METHOD AND APPARATUS FOR TRANSVASCULAR IMPLANTATION OF TENDINE NEOCORDES

专利摘要:
these are methods and devices for the implantation of transvascular prosthetic tendon cords. a catheter is advanced into the left atrium, through the mitral valve, and into the left ventricle. a ventricular anchor is positioned from the catheter and to a wall of the left ventricle, leaving a ventricular suture attached to the ventricular anchor and extending proximally through the catheter. a leaflet anchor is positioned to attach a mitral valve leaflet to a leaflet suture, the leaflet suture extending proximally through the catheter. the leaflet suture is attached to the ventricular suture to limit a range of travel of the leaflet towards the left atrium. an in situ mitral valve leaflet containment is also revealed, which has a neopapillary muscle and a tendon neocord.
公开号:BR112019013553A2
申请号:R112019013553-7
申请日:2017-12-29
公开日:2020-01-07
发明作者:B. Bishop Gordon；T. Lashinski Randall；Griswold Erik
申请人:Pipeline Medical Technologies, Inc.；
IPC主号:

专利说明:

Invention Patent Descriptive Report for: METHOD AND APPARATUS FOR TRANSVASCULAR IMPLANT OF TENDINE NEOCORDES
Incorporation as a Reference to Any Priority Requests [001] This request is a continuation in part of US Patent Application Serial Number 15 / 638,176, filed on June 29, 2017, which claims priority of Provisional Patent Application Number of US Series 62 / 441.031, filed on December 30, 2016, and the totality of each of these requests is incorporated, by reference, in this document, for all purposes.
Background
Field [002] The present disclosure relates, in general, to mitral valve correction devices and techniques, and in particular, to transvascular methods and devices for the replacement of tendinous cords to reduce mitral regurgitation.
Description of the Related Art [003] The heart includes four heart valves, which allow blood to pass through the four chambers of the heart in one direction. The four valves are the tricuspid, mitral, pulmonary and aortic valves. The four chambers are the right and left atria (upper chambers) and the right and left ventricles (lower chambers).
Petition 870190083220, of 26/08/2019, p. 6/200
2/124 [004] The mitral valve is formed by two leaflets, which are known as the anterior leaflet and the posterior leaflet, which open and close in response to the pressure exerted on the leaflets by pumping the heart. There are several problems that can develop or occur in relation to the mitral valve. Such problems include mitral valve regurgitation (RVM), in which the mitral valve leaflets do not close properly, which can cause leakage of the mitral valve. Severe mitral regurgitation can adversely affect cardiac function and compromise the patient's quality and life expectancy.
[005] Several techniques have been developed for the correction of mitral valve regurgitation. They include heart transplantation, valve replacement or correction, shortening or replacement of tendon cords and mitral annular correction, also known as annuloplasty, which depends on the underlying stage and etiology.
[006] Regarding the replacement or correction of tendon cords, some surgical and transapical approaches have been proposed. However, despite efforts, there is still a need for a transvascular approach to the replacement or correction of tendon cords to reduce or eliminate RVM.
Summary of the Invention [007] In accordance with one aspect of this
Petition 870190083220, of 26/08/2019, p. 7/200
3/124 disclosure, a method for implanting prophetic transvascular tendon cords is provided. The method can comprise the steps of advancing a catheter into the left atrium, through the mitral valve, and into the left ventricle; and positioning a ventricular anchor from the catheter and into a wall of the left ventricle, leaving a ventricular suture attached to the ventricular anchor and extending proximally through the catheter. A leaflet anchor is positioned to attach a mitral valve leaflet to a leaflet suture, the leaflet suture extending proximally through the catheter. The leaflet suture is attached to the ventricular suture to limit a range of travel of the leaflet towards the left atrium.
[008] The step of positioning a leaflet anchor may comprise attaching the leaflet anchor to the leaflet, within a range of about 3 mm to about 10 mm, from a coaptive leaflet edge. The step of positioning a ventricular anchor may comprise fixing the anchor to the ventricular septum or to the ventricular wall, preferably away from the apex. The step of positioning a ventricular anchor may comprise advancing an anchor trigger through the mitral valve, rotating the trigger to secure the ventricular anchor, and retracting proximally to the anchor trigger to expose the ventricular suture carried by the ventricular anchor.
Petition 870190083220, of 26/08/2019, p. 8/200
4/124 [009] The step of placing a leaflet anchor may comprise placing a needle guide in contact with the leaflet and advancing a needle from a needle guide and through the leaflet. The method may further comprise deviating a distal portion of the needle guide through an angle of at least about 160 degrees to position a distal end of the needle guide against the ventricle side of the leaflet. The needle guide can comprise a notched tube and the deviation of the needle guide can be performed by proactively retracting a pulling thread.
[010] The securing step may comprise applying a suture lock to the ventricular suture and the leaflet suture. The method may further comprise applying tension to the leaflet suture prior to the clamping step, to improve leaflet function. The method may further comprise applying sufficient tension to the leaflet suture to pull the leaflet path limit during a systole to approximately the level of the annulus. The securing step may comprise engaging a knot to secure the leaflet suture and the ventricular suture. The method may additionally comprise the step of cutting the leaflet suture and the ventricular suture proximally to the suture lock or knot, leaving the leaflet suture and the ventricular suture to function as native cords.
Petition 870190083220, of 26/08/2019, p. 9/200
5/124 [011] The method can additionally comprise the initial stage of identifying a patient, which includes at least three characteristics selected from the group consisting of: the patient was diagnosed with primary or degenerative mitral regurgitation; the patient was diagnosed with functional or secondary mitral regurgitation; the patient was diagnosed with myxomatous mitral regurgitation; the patient was diagnosed with an accentuated leaflet, broken cords, or leaflet prolapse; the patient has grade 1 or more mitral regurgitation; the patient has an annular diameter from leaflet A2 to leaflet P2, at least 5 mm smaller than the sum of leaflet length P2 + A2; the patient has an annular diameter of leaflet A2 to P2 of at least 10 mm; and the patient has an access vessel diameter of at least 2 mm.
[012] The patient may additionally have at least one characteristic selected from the group consisting of: the patient was evaluated by a cardiology team that includes at least one cardiac surgeon, and determined not to be an appropriate candidate for open surgical correction conventional; the patient has predicted STS operative mortality (STS score) of 2 or more; the patient was offered and refused open surgical correction; the patient is between 18 and 90 years old; the patient will not accept blood transfusion; the patient had open surgery
Petition 870190083220, of 26/08/2019, p. 10/200
6/124 thorax anteriorly; and the patient has an ejection fraction of at least 10 percent.
[013] In accordance with an additional aspect of the present disclosure, a method of enlarging the coaptive area of the mitral valve leaflet during systole is provided. The method comprises the steps of attaching at least one first ventricular tension element to a ventricle wall and attaching at least one first leaflet tension element to a mitral valve leaflet. The leaflet tension element is retracted proximally to move the leaflet's path limit, during the systole, towards the ventricle, thereby increasing the coaptive area of the mitral valve leaflet during the systole. The leaflet tension element has since been attached to the ventricular tension element.
[014] The ventricular tension element may comprise a neopapillary muscle that has a distal end facing the ventricular anchor and a proximal end approximately at the top of the native papillary muscle, and the gripping step may comprise grasping the tension element of leaflet to the ventricular tension element at the proximal end of the neopapillary muscle. The neopapillary muscle can comprise an elongated atraumatic body, and can comprise ePTFE.
[015] The step of attaching a tension element to
Petition 870190083220, of 26/08/2019, p. 11/200
7/124 leaflet may comprise advancing a needle guide, which has a distal end through the mitral valve and into the left ventricle, and deflecting the needle guide through an angle of at least 160 degrees to bring the distal end into contact with the leaflet during diastole. The method may further comprise advancing a leaflet anchor positioning needle out of the distal end of the needle guide and through the leaflet, and positioning an anchor from the needle. The step of placing an anchor may comprise placing an anchor from a first reduced cross section, within the positioning needle, to a second enlarged cross section to rest against the atrial side of the leaflet. The step of placing an anchor can comprise placing a pledget.
[016] The step of proximally retracting the leaflet tension element may comprise positioning an opening in the left ventricle, at least the leaflet tension element extending through the opening, and proximally retracting the tension element leaflet, the opening being like a fulcrum, so that the tension element pulls the leaflet towards the ventricle. The fulcrum can comprise a distal opening of the catheter and the step of retracting proximally can comprise retracting proximally the leaflet tension element through the
Petition 870190083220, of 26/08/2019, p. 12/200
8/124 catheter. The method may further comprise attaching a second leaflet tension element to the leaflet and to the ventricular tension element.
[017] In accordance with an additional aspect of the present disclosure, an in situ mitral valve leaflet containment is provided. The restriction comprises an elongated, flexible neopapillary muscle, which has a proximal end and a distal end, and a helical tissue anchor attached to the distal end of the neopapillary muscle. An elongated, flexible neocord extends proximally to the neopapillary muscle, and a leaflet anchor is attached to a proximal end of the neocord. The leaflet anchor is expandable from a reduced first cross section to advance through the leaflet, to a second enlarged cross section to contact an atrial side of the leaflet. The neocord may be attached to a suture that extends distally through the neopapillary muscle, up to the helical tissue anchor.
[018] The helical anchor may comprise a laser-cut hypotube. The helical anchor may comprise one or two or more rounded spiral wires. The neocord may comprise a suture that extends from a proximal end of the neopapillary muscle to the leaflet anchor. The suture can extend through the neopapillary muscle, up to the helical tissue anchor.
Petition 870190083220, of 26/08/2019, p. 13/200
9/124 [019] The neocord may comprise a first component, which extends proximally from the neopapillary muscle, and a second component that extends distally from the leaflet anchor. The proximal portion of the first component and a distal portion of the second component can be joined together by means of a locking device. The locking device can have a locked configuration and an unlocked configuration. The locking device can be configured to be advanced through the first component and the second component when in an unlocked configuration and to securely tighten the first component and the second component when in a locked configuration.
[020] The leaflet anchor can comprise a pledget. The pledget can be configured to collapse by pulling a suture attached to the pledget, so that the pledget takes on the second enlarged cross-section when collapsing. A suture can be threaded through at least two, at least three, or more than three openings in the pledget. The openings can be substantially collinear. The booklet anchor may comprise a marker bar T. The marker bar T may include a bar pivotally coupled to a suture, so that rotation of the bar extends the booklet anchor from the first reduced cross section to the second cut
Petition 870190083220, of 26/08/2019, p. 14/200
10/124 extended cross section. The booklet anchor may comprise a cube. The hub may include a plurality of flexible radially extending spokes. The spokes can be configured to bend in alignment along a longitudinal geometric axis, so that they are confined within a delivery needle. The spokes can be inclined to expand radially outward, when not confined, to enlarge the leaflet anchor from the first reduced cross section to the second enlarged cross section.
[021] The helical anchor may comprise a hub configured to receive and hold, with friction, a suture. The helical anchor may comprise a loop to attach the neopapillary muscle to the helical anchor. The neopapillary muscle can comprise a soft strip.
[022] According to an additional aspect of the present disclosure, a tendon neocord positioning system may include an elongated, flexible tubular body, which has a proximal end and a distal end. A helical ventricular anchor can be positioned inside the tubular body, which has a rotating trigger, which extends proximally through the tubular body. A leaflet anchor radially expandable within the tubular body, which has a suture that extends proximally through the tubular body.
[023] In accordance with an additional aspect of this
Petition 870190083220, of 26/08/2019, p. 15/200
11/124 development, a tendon neocord positioning system is provided. The positioning system comprises a catheter having a proximal end and a distal end; a helical anchor inside the catheter; and a radially expandable leaflet anchor inside the catheter. The helical anchor has a trigger configured to rotate the helical anchor and extend proximally through the catheter. The leaflet anchor has a suture that extends proximally through the catheter.
[024] The radially expandable leaflet anchor can comprise a pledget. The pledget can be transformable, from an elongated strip configuration to a radially enlarged configuration, axially shortened, by means of proximal retraction of the suture. The radially expandable leaflet anchor can comprise the suture inserted between two sheets of material. The radially expandable leaflet anchor may comprise a deviable positioning tube carried within the catheter.
[025] A deviation zone distal from the positioning tube can be deflected through an angle of at least about 160 degrees in response to manipulation of a proximal deviation control. The distal deviation zone can be within about 1.5 cm from a distal end of the positioning tube. The distal deviation zone can be deviated to form a curve with a radius of
Petition 870190083220, of 26/08/2019, p. 16/200
12/124 best fit of no more than about 1.5 cm. The deflectable positioning tube may comprise a notched deflection tube.
[026] The positioning system of the tendinous neocords can be configured to position the helical anchor in a distal direction and to position the radially expandable anchor in a proximal direction. The expandable leaflet anchor can be inserted in sequence in the catheter, after the helical anchor and the driver have been removed from the catheter. The expandable leaflet anchor, the helical anchor, and the driver can be pre-loaded into the catheter.
[027] In accordance with an additional aspect of the present disclosure, a leaflet anchor delivery system is provided. The leaflet anchor delivery system comprises a delivery shaft and a fabric perforation element. The delivery axis has a distal portion, a proximal portion and a deviation zone positioned at a distal portion of the delivery axis. The perforating element of the fabric is configured to be advanced through the distal end of the delivery shaft. The deviation zone is configured to position the distal end of the delivery axis on the ventricular side of the leaflet, with the proximal portion of the delivery axis extending to the left atrium. The deviation zone can comprise a flexible tube. The flexible tube, when
Petition 870190083220, of 26/08/2019, p. 17/200
13/124 deviated, it can have a radius of better curvature adjustment of less than 2 cm.
[028] In accordance with an additional aspect of the present disclosure, a pledget is provided for anchoring in a cardiac leaflet. The pledget comprises two flat sheets that comprise substantially overlapping areas; a suture positioned between the two flat sheets; and one or more openings that extend through the two flat sheets. The suture has a proximal end and a distal end. The proximal end extends from the first side of the two flat sheets. The one or more openings that extend through the two flat sheets are sized to receive the suture. The two flat sheets are joined over the portions of the overlapping areas, on both sides of the suture.
[029] The suture can be at least partially flat between the two leaves. One or more openings may extend through the flattened suture. The distal end of the suture can extend to a second side of the two flat sheets, opposite the first side. The suture may extend between the two flat sheets, along a substantially straight line. The suture can extend between the two flat sheets, along a zigzag or wavy direction. The two flat sheets may comprise expanded polytetrafluoroethylene. At least one of the two
Petition 870190083220, of 26/08/2019, p. 18/200
14/124 flat sheets can be at least partially sintered.
[030] A proximal end of the suture that extends from the first side of the two flat sheets can be threaded through one or more openings. The pledget may comprise a collapsed configuration, in which the two flat sheets are folded at least once to form a radially enlarged cross-section. The radially enlarged cross section can extend around the suture as it passes through one or more openings.
Brief Description of the Drawings [031] Figure 1 illustrates the annulus of the mitral valve with a suture attached as it is delivered through the catheter.
[032] Figure 2 illustrates the distal anchor that is delivered through the catheter and attached to a suture additionally connected to the mitral annulus.
[033] Figure 3 illustrates the distal anchor that is rotated to the apex of the heart, with the suture lines fixed for later fixation to the mitral leaflet or mitral annulus.
[034] Figure 4 illustrates the distal anchor rotated to the apex of the heart with the suture lines attached to the mitral leaflet or the mitral annulus.
[035] Figure 5 illustrates the distal anchor fixed and projected above the apex of the heart, approximately at the same
Petition 870190083220, of 26/08/2019, p. 19/200
12/124 height than the top of the papillary muscles.
[036] Figure 6 illustrates the distal anchor fixed and projected above the apex of the heart, at approximately the same height as the top of the papillary muscles and attached to the mitral annulus and / or the mitral leaflet.
[037] Figure 7 illustrates the distal anchor fixed and projected above the apex of the heart, at approximately the same height as the top of the papillary muscles, and attached to a loop suture that runs through the catheter.
[038] Figure 8 illustrates a suture loop delivered from a perforated catheter through the mitral leaflet, with tension relief on the ventricular side of the mitral leaflet and a distal anchor at the bottom of the left ventricle, with the final suture tension adjustment. is maintained with an advanced suture lock over the suture tails.
[039] Figure 9 illustrates a suture line delivered by a catheter, perforated through the mitral leaflet, with tension relief on the ventricular side of the mitral leaflet and in which a suture lock is advanced to the atrial side of the mitral leaflet to secure the suture tail, before cutting the suture.
[040] Figure 10 illustrates a suture line delivered by a catheter, perforated through the mitral leaflet, with tension relief on the ventricular side of the mitral leaflet, and an advanced suture lock for the atrial side of the
Petition 870190083220, of 26/08/2019, p. 20/200
16/124 mitral leaflet, to attach the suture tail. The other end of the suture tail extends from the catheter that crosses the distal anchor located at the bottom of the left ventricle, for tensioning the suture. An
second suture lock is advanced over the final tail of suture, since the tension of the suture is adjusted by
user.
[041] Figure 11 illustrates a suture loop
delivered by catheter, perforated through the mitral leaflet, with a strain relief on the ventricular side of the mitral leaflet, in a loop configuration over the strain relief, and a distal anchor at the bottom of the left ventricle, with the final tension adjustment suture is maintained with an advanced suture lock over the suture tails. Keeping the leaflet firm and counterbalancing the puncture force of the strain relief are illustrated, with a cryocatheter attached to the mitral leaflet.
[042] Figure 12 illustrates a suture loop
delivered through the catheter, perforated through the mitral leaflet, with a strain relief to be delivered on the ventricular side of the mitral leaflet, in a loop configuration around the strain relief, and a distal anchor at the bottom of the left ventricle, with the final suture tension adjustment is maintained with an advanced suture lock over the tails of
suture. Keeping the leaflet firm and the counterbalance of
Petition 870190083220, of 26/08/2019, p. 21/200
17/124 strain relief puncture force are illustrated, with a cryocatheter attached to the mitral leaflet.
[043] Figure 13 illustrates a view from the side of the atrium that shows where the mitral annulus is perforated and where the distal anchor is located, in relation to the native papillary muscles.
[044] Figure 14 illustrates a view from the side of the atrium that shows where the mitral annulus is perforated and where the distal anchor is located, in relation to the native papillary muscles.
[045] Figure 15 illustrates a variety of anchors for attachment to the apex of the left ventricle, which includes the curled round wire and the laser cut hypotube, with the vertical risers adjusting to the connection point closest to the height of the papillary muscles to better simulate the correct angle and combine new string connections.
[046] Figure 16 illustrates a transeptal catheter that delivers an anchor to the apex of the left ventricle with a plurality of fixed replacement strings and extending out of the catheter handle.
[047] Figure 17 illustrates a transeptal catheter that delivers a drilling tool through the mitral leaflet, to deliver a strain relief anchor connected to a suture loop.
Petition 870190083220, of 26/08/2019, p. 22/200
18/124 [048] Figure 18 illustrates a transeptal catheter that delivers a suture loop through the perforation of the mitral leaflet, through the leaflet with the suture loop.
[049] Figure 19 illustrates a transeptal catheter that delivers tension relief to the ventricle side of the mitral leaflet, which exposes it for delivery through, or with the drilling tool.
[050] Figure 20 illustrates a transeptal catheter that delivers tension relief, and in which the drilling tool is removed for the mitral leaflet.
[051] Figure 21 illustrates a transeptal catheter that delivers tension relief with the connection to the distal anchor and where the suture loop extends backwards, out of the catheter handle.
[052] Figure 22 illustrates a transeptal catheter that delivers a suture lock to the distal anchor that advances over the suture tail, while tension is applied from the proximal end of the suture backwards, out of the catheter handle to adjust the position and tension of the final implant suture, now connected to the mitral leaflet and the distal apical anchor.
[053] Figure 23 illustrates a final suture loop that anchors the distal apical anchor to the mitral leaflet, noting that the mitral anchor can be a single-sided or a single-sided flange, as shown in the non-view.
Petition 870190083220, of 26/08/2019, p. 23/200
Exploded 19/124.
[054] Figure 24 illustrates a continuous loop anchor delivered in its final position, with a distal apical anchor and a strain relief element in the mitral leaflet.
[055] Figure 25 illustrates an example of a distal apical anchor constructed of a stainless tube and a silicone anchor plug // to limit the movement of the suture before the delivery of the suture lock for final positioning. Materials can be varied and changed to accommodate size and material improvements.
[056] Figure 26 illustrates a catheter that penetrates the septum from the right atrium and the left atrium.
[057] Figure 27 illustrates an anchor that is rotated in the left ventricle.
[058] Figure 28 illustrates the distal apical anchor, in place, with suture lines fixed and extending backwards through the catheter, and an extension arm exposed to capture the mitral leaflet with a needle to be triggered, when correctly positioned on the leaflet.
[059] Figure 29 illustrates the extension arm in contact with the mitral leaflet, and the needle connected to a suture loop that penetrates the leaflet to expose a suture loop on the atrial side of the mitral leaflet.
[060] Figure 30 illustrates the suture loop exposed on the atrial side of the leaflet that penetrates through the leaflet
Petition 870190083220, of 26/08/2019, p. 24/200
20/124 mitral valve to accept a loop catheter to capture the suture loop and recover through the catheter.
[061] Figure 31 illustrates the closed suture loop around the suture loop, and in which the suture is removed proximally through the catheter.
[062] Figure 32 illustrates the catheter to deliver a suture lock at the back of the mitral leaflet, as the suture is looped around the pathway, which includes the distal apical anchor.
[063] Figure 33 illustrates a second catheter to contain the ends of the suture, to deliver a suture lock through both leaflets, blocking the suture together, after proper tensioning of the two ends.
[064] Figure 34 illustrates the final position of the suture locks in position above and below the mitral leaflet, and the suture ends cut to leave a final implant of a distal apical anchor connected to the mitral leaflet.
[065] Figure 35A illustrates the fixation of a neopapillary muscle inside the left ventricle.
[066] Figure 35B illustrates a directional leaflet piercing catheter that advances through the mitral valve.
[067] Figure 35C illustrates the directional leaflet perforation catheter deflected through an angle of at least about 180 °.
Petition 870190083220, of 26/08/2019, p. 25/200
21/124 [068] Figures 35D to 35G illustrate the perforation of the leaflet and the placement of a collapsible pledget leaflet anchor.
[069] Figure 35H illustrates a ventricular suture and a leaflet suture that extends proximally through the positioning catheter.
[070] The Figures 351-1 a 351-4 illustrate O positioning an anchor of flyer like with T. identification[071] The Figures 35J-1 to 35J-3 illustrate O positioning an anchor of fabric radially
expandable.
[072] Figure 35K schematically illustrates a fulcrum positioned approximately at the proximal end of the neopapillary muscle.
[073] Figure 35L illustrates the verification of the function of the mitral valve before removal of the positioning system.
[074] Figure 35M illustrates the fixation of the leaflet suture to the ventricle suture that follows the desired tension.
[075] Figure 35N illustrates the cut of the leaflet sutures and the ventricle sutures, leaving the construction of neocords in place.
[076] Figure 350 illustrates a targetable portion,
Petition 870190083220, of 26/08/2019, p. 26/200
22/124 distal, from a leaflet perforation catheter, which has a deviated compound configuration.
[077] Figure 36A is an image of a looped papillary muscle, in a configuration in which it is captured first.
[078] Figure 36B shows the papillary loop pulled up over the strings, in an area where the cutting step is preferably performed.
[079] Figure 37 illustrates a modality of a rope cutting tool.
[080] Figure 38A represents the installation of a helical anchor near the apex of the left ventricle, through a ventricular anchor delivery subsystem.
[081] Figure 38B represents the positioning of a leaflet anchor delivery subsystem on the ventricular side of the leaflet, using a distal flexible tube.
[082] Figure 38C represents the perforation of the leaflet using a needle disposed at the distal end of the ventricular leaflet delivery subsystem.
[083] Figure 38D represents the advancement of a pledget leaflet anchor through the needle, in a reduced radial cross-section.
[084] Figure 38E represents the anchor of the pledget leaflet that expands to an expanded radial cross-section.
Petition 870190083220, of 26/08/2019, p. 27/200
23/124 [085] Figure 38F represents the anchor of the pledget leaflet which is folded in a collapsed configuration to anchor the suture against the atrial side of the leaflet.
[086] Figure 38G represents the advancement of a suture lock through a suture lock delivery subsystem over the leaflet anchor suture and the ventricular anchor suture, to connect the leaflet anchor to the ventricular anchor.
[087] Figure 38H represents the suture lock in the locked position, after the tension has been adjusted with the suture tails cut.
[088] Figure 39A represents a perspective view of a distal end of the ventricular anchor delivery subsystem.
[089] Figure 39B represents a perspective view of a proximal end of the ventricular anchor delivery subsystem.
[090] The figure 39C represents a view partially exploded one end distant of subsystem delivery of anchor ventricular. [091] The figure 4 0A represents a View in
perspective of a distal end of the leaflet anchor delivery subsystem.
[092] Figure 40B represents a perspective view of a proximal end of the subsystem of
Petition 870190083220, of 26/08/2019, p. 28/200
12/24 leaflet anchor delivery.
[093] Figure 40C represents an exploded view of the distal end of the leaflet anchor delivery subsystem.
[094] Figure 40D represents a perspective view of a flexible tube of the leaflet anchor delivery subsystem.
[095] Figure 40E represents a side view of a flexible pipe transition region of the booklet anchor delivery subsystem.
[096] Figure 40F represents an orthogonal side view, from that shown in Figure 40E, of the transition region of the flexible tube of the leaflet anchor delivery subsystem.
[097] Figure 41A represents a perspective view of a distal end of the suture lock delivery subsystem.
[098] Figure 41B represents a perspective view of a proximal end of the suture lock delivery subsystem.
[099] Figure 41C represents a partially exploded view of the distal end of the suture lock delivery subsystem.
[100] Figure 41D represents a perspective view of a distal end of an assembly of
Petition 870190083220, of 26/08/2019, p. 29/200
12/25 cut.
[101] Figure 41E represents a side view of a cutting assembly portion of the suture lock delivery subsystem, in a configuration where the cutting head is not advanced to retain the sutures before they are cut.
[102] Figure 41F represents a side view of a cutting assembly portion of the suture lock delivery subsystem, in a configuration in which the cutting head is advanced to cut the sutures.
[103] Figure 41G represents a side view of a suture lock and a distal end of a trigger
of torque configured for if engage with suture.[104] The figure 41H represents a View gives proximal end of latch suture. [105] The figure 411 represents a View gives
distal end of the suture block.
[106] Figure 42 schematically illustrates a construction of neocords implanted between two papillary muscles, so that the construction of neocords can be substantially aligned parallel to the native strings.
[107] Figure 43A schematically represents a pledget formed by integrating a distal end of a suture between two flat sheets of the pledget.
Petition 870190083220, of 26/08/2019, p. 30/200
26/124 [108] Figure 43B schematically represents a cross section of the pledget in Figure 43A.
[109] Figure 43C schematically represents the pledget in Figure 43C, which includes openings through which the suture tail can be threaded back to form a collapsible anchor.
Detailed Description of the Preferred Modalities [110] A method for fixing a broken or unstable rope could include a catheter delivered through the femoral vein and which passes through the inferior vena cava (IVC) and transeptal to the left atrium, where fixation is made to the mitral annulus. . This fixation can be a single suture loop through the mitral annular tissue, or an anchor inserted in the annulus, either rotated, perforated or screwed into the local tissue, where the mitral leaflet meets or close to the atrial tissue in the mitral annulus. The anchor can be constructed from a coiled wire anchor, which would be rotated on the fabric with a suture receiver to replace the ropes, or a pre-fixed cord attached to the anchor.
[111] A connection to the mitral annulus can provide a safe and positive fixation point, such as a stable anchor, through a piercing anchor, hook or corkscrew. For this fixation point, a rope can be connected to cover the mitral valve leaflet and be additionally attached or anchored to the apex of the ventricle
Petition 870190083220, of 26/08/2019, p. 31/200
27/124 left. It could also be perforated through the anterior or posterior mitral leaflets, in any position. The rope can be produced from PTFE, PE or rounded, flattened nylon, as conventionally used in rope correction surgery.
[112] In some embodiments, the rope can serve as a neocord or prophetic rope. The rope can be a standard suture in certain modalities. In some embodiments, one or more additional prophetic elements may be attached to the rope. For example, tubular structures can be advanced (for example, slid) over the cord via the delivery device. The structures can be configured to position themselves appropriately, along the length of the rope, or the structures can be attached to the rope along an appropriate position (for example, by placing lock members proximally and / or distally from the structure ). Any suitable locking members can be used to position the structures in place. The locking members may be crimped, may comprise mechanical locking mechanisms and / or may engage frictionally with the rope, which requires a threshold amount of force to be advanced on the rope. Any suitable type of locking member can be used. The locking members may be similar to the suture locks described in this document elsewhere. In
Petition 870190083220, of 26/08/2019, p. 32/200
28/124 some modes, the locking members can be configured to be advanced distally and proximally over the rope. In some embodiments, the locking members can be configured to advance in only one direction (for example, distally over the rope). In some embodiments, additional prophetic structures may be attached to a proximal end, distal end, or intermittently along the length of the rope. The rope can be attached to a proximal or distal end of the prophetic structure. For example, two strings can be used, one attached to a proximal end of the structure and one attached to a distal end of the structure. In some embodiments, the rope can connect to the structure, for example, at a proximal and / or distal end (for
example, inserted or wrapped around a shoulder strap at structure), what if extend parallel to long of length of the structure. THE prophetic structure can to be
configured to contact one or more physiological tissues (for example, to interface with the leaflet) and / or can be configured to replicate the mechanical / structural properties of physiological structures (for example, the papillary muscle).
[113] Anchoring to the annulus can provide a fixation point that is positive and immobile in relation to the mitral leaflets, which are difficult to capture with a broken rope,
Petition 870190083220, of 26/08/2019, p. 33/200
12/29 due to movement in each heartbeat. This movement can be interrupted with an unstable leaflet grab by means of a mechanical clamp tool, suction tube or a cryocatheter to freeze the leaflet, as will be described in more detail below, in relation to certain illustrated modalities. As the upper anchor is positively attached to the mitral annulus, it can be covered over the mitral leaflet, and between the existing cords to limit the location laterally, in relation to the leaflet. The location of the leaflet between the existing cords provides the artificial cord with a positive anchor at the upper anchor point, a fixed angular location that passes through the existing cords and another positive location at the apex of the left ventricle. The replacement rope can be a simple suture thread or a plurality of strings that cross the path, as described above, which allows the load to be carried by a plurality of strings.
[114] The lower apical anchor that can be located in the left ventricle can be attached using a rotating screw or plug to positively retain the cord. The anchor can be short, in height, and close to the base of the apex, or have an extended length to better correspond to the native papillary muscles about 20 to 22 millimeters above the apex of the left ventricle.
Petition 870190083220, of 26/08/2019, p. 34/200
12/30
In some embodiments, the anchor extends less than 5 mm, 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm or more than 50 mm, above the apex and / or in a range between the values mentioned above. A single string or a plurality of strings could be attached to one or more anchors at the base of the left ventricle. The anchor can be constructed from an implantable grade of implantable stainless steel, Nitinol or other metallic material that would be visible on fluoroscopy, or a polymeric material, such as PEEK, PTFE or other implantable materials. These polymers can be doped with a radiopaque marker for visibility, if necessary.
[115] A modality for the anchoring system may comprise the apical tissue anchor that attaches or attaches to the left ventricle, an ascending tube that projects the fixation from the apical tissue anchor and that can be constructed from a monolithic material or a combination of materials, which include polymers and metallic components. The construction can be rigid everywhere or have flexible joints to allow movement or an elastic zone, or zones for controlled movement and flexibility. It can be constructed with a rounded crossing profile or any other profile, which includes a longitudinally variable shape. The diameter can be about 6 to 24 French (2 to 8 millimeters) and a length
Petition 870190083220, of 26/08/2019, p. 35/200
31/124 of about 20 to 40 millimeters and is delivered through a directional catheter with or without a guide wire usually along the central geometric axis. Since the anchor of the upper leaflet is attached to the mitral annulus, or to the leaflet, and covered over the mitral leaflet and additionally coupled to the lower anchor, a tension force would allow an adjustment by means of image / monitoring in real time (for example , under live echo), while monitoring booklet movements and reducing regurgitant flow. The final step could be to tension, lock and disconnect the rope from the delivery system. A string tension would apply tension to the strain relief of the connected mitral valve leaflet and a locking device, such as a LSI Solutions Cor-Knot, could be advanced below the string and, finally, the suture tail could be cut .
[116] According to one modality (see Figures 1 to 7), the delivery steps for the replacement string may include:
1. Transvenous, transfemoral entry of the introduction catheter 100;
2. Advance of catheter 100 to the right atrium 10;
3. Transseptal advancement 12 of catheter 100 to the left atrium 14;
Petition 870190083220, of 26/08/2019, p. 36/200
12/32
4. Advance of catheter 100 to the mitral annulus 16 for positioning and delivery of the strain relief anchor 18;
5. Positioning of a mitral leaf grab tool;
6. Fixing the relief anchor
tension 18 to annulus mitral 16 r7. Advance gives rope in replacement 22 regarding the valve mitral 25 and between the strings existing 17;8. Advance gives rope 22 to the summit 20
left ventricle and distal fixation at apex 20;
9. Tensioning of the 22 string, while monitoring the movement of the mitral valve leaflet;
[117] Alternatively, in certain modalities (see, for example, Figures 26 to 34), delivery may be in a somewhat opposite order:
10. Transfemoral entry of delivery catheter 100;
11. Advance of catheter 100 to the right atrium 10;
12. Transseptal advancement 12 of catheter 100 to the left atrium 14;
Petition 870190083220, of 26/08/2019, p. 37/200
12/33
13. Advance of delivery catheter 100 through mitral valve 24 to the apex 20 of the left ventricle;
14. Delivery of the distal ventricular anchor (for example, revolving anchor 32) at the apex 20;
15. Withdrawal of the delivery catheter
100 to expose the lower apical anchor 30;
16. Pull the delivery catheter 100 proximal to expose the new line 22 or lines 22 of rope suture;
17. On each new cord 22, a tension relief from the mitral leaflet can be delivered through the mitral leaflet and on the ventricular side of the leaflet;
18. An advance in a lock suture 26 on the tail of suture 28 for halt The suture position at position of anchor in tension relief; 19. A cut gives tail of suture at
anchor of the mitral leaflet;
20. Advance of a suture lock 26 over the suture tail of the catheter handle to the mitral leaflet anchor;
Petition 870190083220, of 26/08/2019, p. 38/200
12/34
21. An advance of a suture lock 26 over the suture tail of the catheter handle to the distal apical anchor that locks the applied tension, as applied from the most distal suture tail outside the catheter handle;
22. A cut of the suture tail at the distal apical anchor.
[118] Some of the steps in these methods may be optional. Additional steps can be included, as appropriate. In addition, the steps can be rearranged in any viable order.
[119] One embodiment, according to Figures 1 to 7, will now be described in further detail. Figure 1 illustrates the mitral valve annulus 16, with suture 22 attached, as it is delivered through catheter 100. Figure 2 illustrates distal anchor 32 which is delivered through catheter 100 and attached to suture 22, additionally connected to the mitral annulus 16. Figure 3 illustrates the distal anchor 32 that rotates to the apex 20 of the heart, with suture lines 22 attached for later fixation to the mitral leaflet 24 or to the mitral annulus 16. Figure 4 illustrates the distal anchor 32 rotated to the apex 20 of the heart, with suture lines 22 attached to the mitral leaflet 24 or to the mitral annulus 17. Figure 5 illustrates the distal anchor 32 fixed and projected above the apex 20 of the
Petition 870190083220, of 26/08/2019, p. 39/200
35/124 heart, about the same height as the top of the papillary muscles. Anchor 32 may include a riser 70 connected to a connection point 72 which is about 20 to 40 mm long, in certain embodiments. The riser 70 may be of the same material or of a different material, diameter, stiffness, etc. like the rest of the anchor 32. The riser 70 can be in longitudinal alignment with the rest of the anchor 32, or it can be positioned at an angle to the rest of the anchor 32. The riser 70 can be rigidly fixed or integrated with the remainder of anchor 32, hingedly coupled (for example, joint / socket), or flexibly joined (for example, interconnecting loops). The tension placed on anchor 32 after the installation of the neocords can determine or change the orientation of the riser 70 in relation to the heart and / or the rest of the anchor 32. Figure 6 illustrates the distal anchor 32 fixed and projected above the apex 20 of the heart, about the same height as the top of the papillary muscles. The distal anchor 32 can be fixed through one or more suture lines to the mitral annulus 16 and / or to the mitral leaflet 24. Figure 7 illustrates the distal anchor 32 fixed and projected above the apex 20 of the heart, at approximately the same height as the top of the papillary muscles and attached to a suture 33, in the form of a loop through the catheter 100.
Petition 870190083220, of 26/08/2019, p. 40/200
36/124 [120] Figure 8 illustrates an embodiment in which a catheter-delivered suture 50 in a loop shape can be perforated through the mitral leaflet 24 with a strain relief 52 on the ventricular side of the mitral leaflet 24 and a distal anchor 32 at the bottom of the left ventricle and the final adjustment of the suture tension is maintained with an advanced suture lock 54 over the suture tails 56. The simple suture loop 50 can connect distal anchor 32 to tension relief 52 directly distal anchor and / or other booklet anchor. More than one handle can also be used. In some embodiments, the suture 50 may pass through a suture loop structure on the distal anchor 32 and / or on the strain relief 52, so that it effectively duplicates itself again. In some embodiments, suture 50 may pass through a channel in distal anchor 32 and / or strain relief 52, so that a proximal end of suture 50 enters an opening and a distal end of suture 50 exits into another opening . The openings can be positioned on the same side of the distal anchor 32 and / or strain relief 52. The openings can be positioned on opposite sides of the distal anchor 32 and / or strain relief 52. The relative length of the suture tails 56 that extending from distal anchor 32 and strain relief 52 can determine the effective final position of suture lock 56. For example, by minimizing the length of the tail of
Petition 870190083220, of 26/08/2019, p. 41/200
37/124 suture 56 extending from strain relief 52, suture lock 54 can be effectively positioned on the atrial side of the mitral leaflet 24, as well as directly on strain relief 52. Minimizing the length of the tail of suture 56 extending from the proximal end of distal anchor 32, suture lock 54 can be effectively positioned just above distal anchor 32. Suture lock 54 can be any suitable type of suture locking mechanism, which includes those described in this document, elsewhere. The strain relief 52 may comprise an expandable conformation, so that the strain relief 52 is inserted through the leaflet 24 into a collapsed conformation (e.g., a reduced cross-sectional conformation) and expanded (e.g., to an expanded conformation) cross-section) on the ventricular side of the leaflet 24. The strain relief 52 can expand itself. In some embodiments, the strain relief 52 may be a pledget, as described in this document, elsewhere. The strain relief 52 can be inserted through a needle or other suitable tool to pierce the tissue of the leaflet 24, such as those described herein, in another location. The strain relief 52 can be stored inside, and advanced through an internal lumen of the needle. Needle can restrict strain relief 52 in a conformation
Petition 870190083220, of 26/08/2019, p. 42/200
38/124 collapsed. The strain relief 52 can be inserted through the leaflet 24 with the suture 50 preloaded (for example, in loop, through the strain relief), so that both the proximal end and the distal end of the suture 50 extending since the strain relief remains extending through the perforation, through the leaflet 24, when the strain relief 52 is installed. Suture latch 54 can prevent suture tails 56 from advancing or retracting via suture latch 54, thereby keeping the suture strings in a state of tension after suture latch 54 engaged, allowing the tails to engage. 56 are cut close to suture lock 54. Tails 56 of suture 50 can be cut directly, adjacent to suture lock 54, or proximally away from suture lock 54, allowing a length of tails 56 to extend freely from the suture lock 54. Strain relief 52 and distal anchor can be loaded onto suture loop 50, outside the body, and sequentially installed through catheter 100 in any order.
[121] Figure 9 illustrates an embodiment in which a suture line or loop 60 delivered from a catheter can be perforated through the mitral leaflet 24 with a strain relief 52 on the ventricular side of the mitral leaflet 24. Strain relief 52 can be inserted, as described, in relation to Figure 8. In this modality, a suture lock 62 can
Petition 870190083220, of 26/08/2019, p. 43/200
39/124 be advanced to the atrial side of the mitral leaflet 24 to secure the suture tail, before cutting suture 60. Suture lock 62 can be advanced along only a suture tail 60, in such a way that it does not attach the suture tail extending from distal anchor 32, only the tail extending from strain relief 52. Suture lock 62 can be configured (for example, size and / or shape) to prevent the suture lock is pulled through the perforation in the mitral leaflet 24, when under tension. The suture tail that extends from the anchor
distal 32 can be arrested, according described in relation to Figure 10.[122]Figure 10 illustrates a modality in which a line in suture 60 delivered by catheter Can be
perforated through the mitral leaflet 25 with a strain relief 52 on the ventricular side of the mitral leaflet 25 and an advanced suture lock 62 to the atrial side of the mitral leaflet to fix the suture tail, as described, in relation to Figure 9. A another end of the suture tail extends from the catheter handle, through catheter 100 that crosses around distal anchor 32 located at the bottom of the left ventricle to tension the suture. A second suture lock 63 can be advanced over the final suture tail and locked in position at the final suture tail, since the tension of the suture is adjusted by
Petition 870190083220, of 26/08/2019, p. 44/200
40/124 user. The second suture lock 62 can be configured (e.g., size and / or shape) to prevent the suture lock 62 from being pulled through distal anchor 32 when under tension.
[123] Figure 11 illustrates an embodiment in which a suture loop delivered by catheter 60 can be pierced with a piercing element 27 (for example, a needle) through the mitral leaflet 24 with a strain relief 52 on the ventricular side of the mitral leaflet 24, in a loop configuration around the strain relief 52, and a distal anchor 32 at the bottom of the left ventricle, the final adjustment of the suture tension being maintained with an advanced suture lock over the suture tails . The configuration of this modality can be similar to that illustrated in Figures 8 to 10. The conservation of the firm leaflet and the counterbalance of the stress relieving drilling force can be performed using a cryocatheter 70 attached to the mitral leaflet 24. The cryocatheter 70 can be delivered via the same catheter 100 or via a separate catheter. The cryocatheter may temporarily apply a cooling effect to the mitral leaflet 24, causing the tissue in the leaflet 24 to temporarily adhere to the catheter. Other holding devices can also be used, alone or in combination, which include suction devices, tissue grabbing devices, perforation devices
Petition 870190083220, of 26/08/2019, p. 45/200
Additional 41/124, etc. Providing a holding force to the leaflet 24 can advantageously help to apply a counter force to the leaflet during insertion of the perforation element 27.
[124] Figure 12 illustrates a suture loop 60 delivered by a catheter, perforated through the mitral leaflet 24, with a strain relief to be delivered to the ventricular side of the mitral leaflet, in a loop configuration around the strain relief, and a distal anchor 32 at the bottom of the left ventricle, the final adjustment of the suture tension being maintained with an advanced suture lock over the suture tails. Keeping the leaflet firm and counterbalancing the punching force of strain relief are
illustrated with a cryocatheter 70 stuck mitral leaflet. THE modality illustrated in Figure 12 may be similar The modality illustrated in Figure 11, with the element in drilling 27 retracted from the fabric. [125] Figures 13 and 14 illustrate a side view atrial that shows, according to certain s modalities, where O
mitral annulus 16 is perforated and where distal anchor 32 is located, in relation to native papillary muscles. In some embodiments, the anterior or posterior leaflet or the annular tissue adjacent to it may be perforated. The positioning of the perforation and installation of a strain relief or leaflet anchor can be used to affect the
Petition 870190083220, of 26/08/2019, p. 46/200
42/124 amount of tension exerted on the leaflet.
[126] Figure 15 illustrates a variety of anchor modalities 32a, 32b, 32c, 32d, for attachment to the apex of the left ventricle, which includes the curled round wire 32a, 32b, 32c and the laser cut hypotube 32d, with vertical risers 70 that adjust the connection point 72 closer to the height of the papillary muscles to better simulate the correct angle and combine the new string connections. Anchor 32a comprises a single helical coil that extends around the outside of a longitudinally aligned pointed axis. In some embodiments, the axis can be excluded. Anchor 32b comprises two helical coils, which have substantially the same steps, which extend in opposite directions. In some embodiments, a pointed shaft, such as 32a, can extend between the coils. Anchor 32c includes a single helical coil that reduces in its outer diameter from the proximal end of the coil to the distal end of the coil. Anchor 32d includes a single coil formed from the laser cut hypotube. In some embodiments, the connection point 72 may be a single closed loop. Sutures may be looped or otherwise attached to the loop. In some modalities, other types of connections to the suture, or to another type of rope can be used. Anchor 32c includes a riser
Petition 870190083220, of 26/08/2019, p. 47/200
43/124 in the form of a support, and the connection point 72 that can receive the suture 60, which can be secured within the connection point 72 by a silicone plug 74. Any suitable material can be used for the plug. Connection point 72 may have a channel configured (e.g., size and shape) to receive plug 74. The connector may include one or more openings that extend through a side wall of the channel to allow a suture to pass. Plug 74 may engage frictionally with the channel. One or more sutures can extend through the channel and through an opening in the side wall, as shown in Figure 15. The suture can slide freely through the opening during installation, when plug 74 is absent, allowing length adjustment suture and tension in the suture. Plug 74 can be inserted into the channel and form a tight friction fit with the channel. Plug 74 can be chained by one or more sutures between an outer surface of plug 74 and an inner surface of the side wall, thereby effectively locking the suture in place, relative to anchor 32c. Plug 74 can be installed after adjusting the length and tension of one or more sutures. In other embodiments, the suture may extend through a loop, a distal end of the channel, allowing the suture to slide through it. The proximal and distal ends of the suture may extend
Petition 870190083220, of 26/08/2019, p. 48/200
44/124 through the proximal opening of the channel. Plug 74 can frictionally secure the suture as described above and prevent further suture from slipping relative to anchor 32d. The various features of anchors 32a to 32d described in this document can be used in any suitable combination.
[127] Figures 16 to 22 illustrate another method, according to certain modalities. Figure 16 illustrates a transeptal catheter that delivers an anchor 32 to the apex 20 of the left ventricle, with a plurality of replacement strings 22 attached and extending out of the catheter handle 100. Figure 17 illustrates the transeptal catheter 100 of the Figure 16 that delivers a drilling tool 80 through the mitral leaflet 24 to deliver a strain relief anchor connected to a suture loop 60. Figure 18 illustrates the transeptal catheter 100 that delivers a suture loop 60 through the mitral leaflet 24, perforating the leaflet 24 with the suture loop 60. Figure 19 illustrates the transeptal catheter 100 that delivers the strain relief 52 next to the ventricle of the mitral leaflet 24, exposing it for delivery through, or with the drilling tool 80. In some embodiments, strain relief may self-expand after exposure, as described in this document, elsewhere. Figure 20 illustrates the transeptal catheter that delivers the strain relief 52 and the drilling tool 80 that is
Petition 870190083220, of 26/08/2019, p. 49/200
45/124 removal of the mitral leaflet 24. Figure 20 shows a modality in which two tension reliefs are positioned on opposite sides of the mitral leaflet 24. The leaflet can be sandwiched between the tension reliefs on the atrial side and the ventricular side. The strain relief on the atrial side can be advanced over the suture after the strain relief on the ventricular side 52 is placed in place and the tension applied to the suture to bring the strain relief on the ventricular side 52 into direct contact with the leaflet 24 The strain relief on the atrial side can be configured to be locked or attached to the suture to prevent the generation of clearance between the strain reliefs, which could interfere with the contact between the strain reliefs and the leaflet fabric 24 and remove the pressure relievers. In some embodiments, a suture lock can be advanced behind the strain relief on the atrial side and force the strain relief on the atrial side in level contact with the leaflet tissue 24. In some cases, the use of dual strain reliefs can reduce the tension at the perforation point through the leaflet 24 and mitigate any damage to the leaflet tissue 24. Figure 21 illustrates the transeptal catheter 100 that delivers the strain relief 52 with the connection to the distal anchor 32 and the suture loop 60 which extends backwards through the catheter handle. Figure 22 illustrates the transeptal catheter that delivers a suture lock 62 to distal anchor 32. The lock
Petition 870190083220, of 26/08/2019, p. 50/200
46/124 of suture 22 is being advanced over the suture tail, while tension is applied from the proximal end of the suture, through the catheter, to adjust the position and tension of the final suture of the implant, which is now connected to the mitral leaflet 24 and distal apical anchor 32.
[128] Figure 23 illustrates a modality in its final position, in which the continuous suture loop anchors the distal apical anchor 32 to a strain relief element 52 in the mitral leaflet 24. In some embodiments, the continuous loop can be formed applying suture locks to the loop suture tails. Any other suitable means for forming a continuous loop suture can also be used. In some embodiments, the mitral leaflet anchor or strain relief element 52 may be double-sided (for example, comprising a double-sided flange 52b), as shown in the exploded view, or a single-sided flange 52a, as shown in the unexploded view. The double-sided flange 52b may comprise expandable elements (e.g., expandable flanges) configured to be positioned on opposite sides of the mitral leaflet tissue. In some embodiments, the two opposing flanges can be fixedly coupled to each other via an intermediate element that passes through the perforation of the leaflet 24. The flanges can comprise a plurality of strain relief elements (for example, deformable / flexible handles) configured to distribute the
Petition 870190083220, of 26/08/2019, p. 51/200
47/124 tension across a larger surface area of the leaflet 24.
[129] Figure 24 illustrates a modality in which a continuous loop 90 is delivered in its final position with a distal apical anchor 32 and a strain relief element 52 in the mitral leaflet 24. The modality may be similar to that shown in Figure 23 .
[130] Figure 25 illustrates an example of a distal apical anchor 32 constructed of a stainless steel tube 73 and a silicone anchor plug 72 configured to limit the movement of the suture before delivery of the suture lock 62 for final positioning . In some embodiments, plug 72 can be used as a temporary suture lock. In other embodiments, the plug can serve as a temporary suture lock, in addition, or as an alternative to suture lock 62, which advances over the suture. When plug 72 is used temporarily, it can be removed before completing the implant installation. Materials can be varied and changed to accommodate material size and / or enhancements. In some deployments, anchor 32 can be the same or similar to anchor 32c illustrated in Figure 15.
[131] Figures 26 to 34 illustrate a modality in which the order of placement of the distal apical anchor 32 can be modified. As shown, Figure 26 shows a
Petition 870190083220, of 26/08/2019, p. 52/200
48/124 catheter 100 penetrating the septum 12 from the right atrium and the left atrium 14.
[132] Figure 27 illustrates an anchor 32 that is rotated at the apex of the left ventricle. Anchor 32 can be rotated clockwise or counterclockwise, depending on the anchor configuration. Anchor 32 can be rotated by a delivery instrument (for example, a rotary driver) that can be inserted through catheter 100, as described in this document, elsewhere. In addition, although the illustrated modality shows anchor 32 which is rotated at the apex of the left ventricle, in modified modalities,
anchor 32 can to be prey The other locations inside of Left ventricle . Per example, according it will be described in more details below, the modalities From methods and
devices described in this document can also be used in arrangements where anchor 32 is positioned in the left ventricle between the papillary muscles. Such an arrangement can advantageously align the suture that extends the anchor 32 and the mitral leaflet 24, in which one or more of the tendinous cords extend from the anchored mitral valve leaflet 24.
[133] Figure 28 illustrates the distal apical anchor 32 in place with suture lines 22 attached and extending backwards through catheter 100 to a proximal end of the delivery device outside the body. The suture
Petition 870190083220, of 26/08/2019, p. 53/200
49/124 can be in loop through anchor 32, as described in this document, in another location. An extension arm 94 of catheter 100 can be exposed on one side of the catheter, somewhat proximal to the distal end of catheter 100. Extension arm 94 can be angled to extend in a proximal direction, from the side of catheter 100 The extension arm can be configured to capture the mitral leaflet 24, as on the ventricular side of the leaflet 24. The extension arm 94 can have a pointed tip or can comprise a needle, or allow a needle to pass through the catheter 100 and the extension arm 94. The leaflet 24 can be attached to a needle configured to be triggered when correctly positioned in the leaflet 24. In some embodiments, the extension arm can be formed into a separate catheter, which is configured to extend and be, independently and distally, liable to advance and proximally retractable through catheter 100.
[134] Figure 29 illustrates the extension arm 94 in contact with the mitral leaflet 24 and the needle 96 connected to a suture loop 60 that penetrates the leaflet 24 to expose a suture loop 60 on the atrial side of the mitral leaflet 24. In some embodiments, the suture loop can be formed from a tail of the suture that extends through the distal anchor 32. The other end can extend proximally, through the delivery catheter, to a
Petition 870190083220, of 26/08/2019, p. 54/200
50/124 proximal end of delivery catheter 100, and out of the body. In some embodiments, the suture loop 60 may be a ring through which the suture is looped. In some embodiments, the suture loop 60 may be a loop in the suture that engages needle 96, and needle 96 may be configured to retain suture loop 60 and prevent the suture loop from being retracted proximally through needle 96 In some embodiments, a continuous suture can be threaded through distal anchor 32, so that four wires extend from distal anchor 32, two of which extend through the proximal end of catheter 100 and two extend to form the suture loop 60.
[135] Figure 30 illustrates the suture loop 60 exposed on the atrial side of the leaflet that penetrates through the mitral leaflet to accept a loop 99 catheter to capture suture loop 60 and recover via catheter 100. The loop catheter can be delivered through another opening of catheter 100, which is positioned proximally to the extension arm 94. The extension arm 94 and the opening of the loop type catheter can be positioned on the same side as catheter 100. The catheter loop type 99 can be configured to contract around suture loop 60, so that loop 99 catheter can retain suture loop 60 and retract it proximally to catheter 100 through catheter opening
Petition 870190083220, of 26/08/2019, p. 55/200
51/124 of the loop type (advancing the suture loop distally through the extension arm 94).
[136] Figure 31 illustrates loop 99 catheter closed around suture loop 60 and where the suture is removed proximally through catheter 100. Figure 32 illustrates catheter 100 that delivers a suture lock 62 on the from the back of the mitral leaflet, as the suture is looped around the path, which includes distal apical anchor 32. Suture lock 62 and distal anchor 32 can be configured so that suture lock 62 can pass freely through the connection point of distal anchor 32 to reach the ventricular side of leaflet 24. For example, suture lock 62 can be configured to pass through a loop on distal anchor 32. Extension arm 94 can be retracted before or during this step, so that leaflet 24 is no longer captured by extension arm 94. In some embodiments, as described in this document, elsewhere, the extension arm can be formed as part of an internal catheter It is advanced through catheter 100 and can subsequently be removed via catheter 100.
[137] Figure 33 illustrates a second catheter 101 to contain the ends of the suture to deliver a suture lock in both leaflets, locking the suture together after proper tensioning of the two ends. O
Petition 870190083220, of 26/08/2019, p. 56/200
52/124 catheter 100 can be removed, bringing the suture loop 60 out of the body, where it can be aligned with the other end of the suture. The second suture lock can be applied over the ends of the suture and subsequently delivered to the body using the second catheter 101. Figure 34 illustrates the final position of the suture locks 62 in the position above and below the mitral leaflet 35, and the suture ends cut to leave a final implant of a distal apical anchor connected to the mitral leaflet 24. The second suture lock 62 can be positioned in alternative positions also in relation to the leaflet 24, depending on the length of the suture between the two suture locks. The positioning of two suture locks on opposite sides of leaflet 24 may allow the suture locks to serve as tension reliefs. In some embodiments, the first suture lock 62 positioned on the ventricular side of the leaflet 24 can be omitted.
[138] Suture locking and rope end termination configurations and devices may include one or more knots, pledgets or other termination techniques to reduce focal stress at attachment points. Perforation through the annular tissue and leaflets can be achieved by inserting a sharp needle and can be conducted through a targetable catheter and central axis to push, locate and guide the needle through
Petition 870190083220, of 26/08/2019, p. 57/200
53/124 of the mitral leaflet. These procedures can be guided under fluoroscopy, echo guidance or any other suitable visualization or monitoring procedure. The location and isolation of the leaflets can be achieved using a mechanical technique of grasping or clamping the leaflet, or by suction or freeze capture with a cryocatheter. These techniques would include a cryocatheter used in ablation procedures to freeze focal tissue, as described, for example, in reference to Figure 12. These cryoablation catheters used for atrial fibrillation often attach to mitral leaflets accidentally and need to be disabled to release the pinned brochures. This same cryofixation can be used to locate and isolate the leaflet in question for reinstallation of the patch. The cryocatheter uses a gas exchange (NO or Argon) to decrease the temperature of the catheter tip and can reach temperatures up to minus 75 degrees Celsius.
[139] The construction of the lower apical anchor may consist of a distal cut wound to rotate at the apex of the left ventricle with a rounded or flattened wire construction, or a laser cut tube that emulates a corkscrew similar to a wine stopper, as described, for example, in Figure 6 and Figure 15. A variable pitch on the screw will allow a safer fixation on the surrounding tissue. Another device for fixing tissue can
Petition 870190083220, of 26/08/2019, p. 58/200
54/124 include a compression or ovalization of the screw anchor to obtain the same fixation. The fixation to the anchor riser can be secured, welded or joined by other mechanical devices. Alternatively, it can be constructed from the same material, and laser cut from the same stainless steel tube, Nitinol or other implantable material. At the most proximal end there may be a loop or tube for receiving the replacement string, as shown in connection 72 of Figure 15, or a plurality of replacement strings can be pre-loaded, ready for delivery, and extending out of the handle of the catheter.
[140] In another embodiment, the distal anchor can be delivered to the apex of the left ventricle with a multiplicity of replacement cords in the anchor and back extension, up to the most proximal grip section of the catheter. This would allow the delivery of multiple anchors to a single point of origin, extending vertically from the apex of the left ventricle, and the free ends of the replacement cord would be extended backwards, out of the delivery catheter for access and advancement of other tools for locking and cutting. On these free ends, a delivery drill element or tube can be advanced into the mitral leaflet to drill and deliver a pledget or retainer element through the leaflet
Petition 870190083220, of 26/08/2019, p. 59/200
55/124 and to the rear side (ventricular side) of the leaflet. This can ensure that a handle and a restraining element prevent the handle from being pulled by the leaflet and act as a strain relief element. On the same free end of the replacement rope, a locking element can be delivered to maintain the position of the rope and pledget firmly in the position of the leaflet. Once delivered, this free end can be cut. Finding and maintaining the leaflet can be achieved by the cryocatheter to hold the leaflet on the atrial side, or a grab tool to grab the leaflet from the free edge could also be used. Once the first perforation and pledget are delivered, the other free end can now be tensioned around the distal apical anchor and a second locking element can be delivered to maintain its position in relation to the end of the apical anchor. The rope or suture anchor can be secured by an interference fit to the distal apical anchor and / or the other rope line that extends to the mitral leaflet. It is important to note that the drawings illustrate the delivery and installation of the anchor of the mitral leaflet in the posterior leaflet, but the anchors and replacement cords can also be delivered to the anterior leaflet or to any position in the mitral leaflet, which includes the free margin, the coaptation zone or the annulus.
[141] Another method would be to place the revolving anchor
Petition 870190083220, of 26/08/2019, p. 60/200
56/124 distal in the left ventricle that is connected to a continuous loop of suture similar to an elastic band. One end would be attached to the distal anchor, and the other end would pierce the mitral valve leaflet and be connected to a strain relief element to distribute the force on the ventricular side of the mitral leaflet, to prevent the replacement cord from being pulled through the leaflet or leaflet break. The strain relief element could be a laser cut tube that expands from a small configuration to a larger configuration, once passed through the leaflet or through a compressive axial force, or it can be constructed of a memory metal of format, such as Nitinol, where it is preset to a format where the delivery diameter is small, and the delivered diameter expands to a larger state. The delivered diameter can be about 0.5 millimeters, expanding by about 2 to 3 millimeters in diameter and has a length of about 2 to 5 millimeters in shortening the delivery to about 1 to 2 millimeters. It can also be constructed of metal with a shape memory and defined as a rounded shape similar to an Amplatz device or a simple or complex suture node located on the ventricular side of the leaflet. Another configuration could be a looped Nitinol wire, which would look like a daisy with Nitinol wire pedals. This device can also be used to adjust
Petition 870190083220, of 26/08/2019, p. 61/200
57/124 the final length of the loop rope by winding or spiraling the loop end passed through the leaflet. For example, the number of times the suture or cord is wrapped around the device can decrease the free length of the suture or cord increasingly. This winding mechanism can also be located at the distal coil anchor located in the left ventricle. The adjustment can be triggered during delivery to adjust the length of the rope and / or post-procedure in which the adjustment is accessed and shortened or lengthened. A rotary drive with ratchet attached to a drive shaft or wire can be rotated externally to the body by coupling and uncoupling when adjustment is necessary. The drive shaft could be a round wire constructed of stainless steel or Nitinol, where a hexagonal coupling interface between the drive shaft and the winding mechanism could be used to engage and disengage the two elements. The two elements could be delivered in a coupled configuration, with each other, for actuation and, later, coupled using a handle-type catheter to grasp the winding mechanism and couple the drive shaft that engages the drive device hexagonal. The winding mechanism can use a simple rotating reel, with a gear-style stop for anti-rotation or a frictional resistance
Petition 870190083220, of 26/08/2019, p. 62/200
58/124 to maintain the tensioned position. Alternatively, designing the distal coil anchor to accept a corresponding internal pitch adjustment screw, which would be attached to the rope and would allow the outer body of the distal anchor to be driven into the apical tissue and, secondarily, a rotation of the corresponding pitch screw internal tension would allow tensioning of the rope, shortening the relative distance between the two screw elements. The simplest configuration would be a coil inside another coil, where both would have a right or left thread and would be coupled to each other to provide a rotary movement in a translational or axial movement. Locking the two coils together after adjustment would provide a positive location of the rope length between the leaflet and the distal anchor system.
Patient Selection [142] In one embodiment, the method of treating a patient begins with selecting an appropriate patient. The methods, apparatus and systems, disclosed in this document, however, are not limited to application only to preferred or otherwise appropriate patients. Preferably, the patient includes at least one, three or five of the following characteristics of a first group:
• Diagnosed with primary or degenerative mitral regurgitation.
Petition 870190083220, of 26/08/2019, p. 63/200
59/124 [143] • Diagnosed with secondary or functional mitral regurgitation.
• Diagnosed with myxomatous mitral regurgitation.
• Diagnosed with unstable leaflet, broken strings or leaflet prolapse.
• Grade 1 of mitral regurgitation or more; 2 or more; 3 or more or; 4 or more.
• Annular diameter of leaflet A2 for leaflet P2, with at least 5, 10, 15, 20, 30, 50 mm less than the sum of leaflet length P2 + A2. Similar mathematical relationships that ensure adequate redundant coaptation after correction, in order to create a durable correction, can also be used.
• Annular diameter of leaflet A2 for P2, 10 to 50 mm, or preferably 24 to 36 mm, or more preferably 26 to 33 mm.
• Diameter of access vessel with at least 2 to 10 mm in diameter.
Preferably, the patient has at least 1,
Petition 870190083220, of 26/08/2019, p. 64/200
60/124 or 5 of the following characteristics of a second group:
Evaluated by a cardiology team, which includes at least one and, preferably, two cardiac surgeons, and determined not to be suitable candidates for conventional open surgical correction.
STS predicted operative mortality (Society of Thoracic Surgeons Score or STS Score) of 2 to 20 or more.
• The patient was offered and refused for open surgical correction.
• Age between 18 and 90, or preferably between 35 and 85, more preferably between 40 and 85.
• The patient will not accept blood transfusion.
• Previous open chest surgery • Ejection fraction of at least 60 percent
For some modalities of the device, it is preferred that the patient is substantially free of the following conditions (the third group):
Petition 870190083220, of 26/08/2019, p. 65/200
61/124 • Moderate or severe COPD • Hypercoagulative disorder • Systemic degenerative collagen disease (ie Marfan's syndrome) • Previous septal infarction affecting the anchor area • Ventricular septal defect • Known means of contrast allergy • Valve replacement previous mitral valve [145] In one modality, the selected patient can meet at least 1, 2 or 3 criteria in the first group and at least 1, 2 or 3 criteria in the second group. In one embodiment, the selected patient can meet at least 1, 2 or 3 criteria in the first group and at least 1, 2 or 3 criteria in the second group, and not meet at least 1, 2 or 3 conditions in the third group.
[146] Patients can be screened using echocardiographic imaging and / or computed tomography imaging. Magnetic resonance imaging is also possible. Preferably, a cardiac computed tomography with at least 32, 64 or 128 cuts is obtained before the procedure and used for patient selection and / or case planning. Using imaging software, the annular diameter can be measured from the point of articulation of A2 to the point of articulation of the leaflet of P2, and the free length of the
Petition 870190083220, of 26/08/2019, p. 66/200
62/124 leaflet can be measured. These measurements can be compared to ensure that after the procedure is completed, there will be sufficient redundant coaptation to produce a durable correction. In one embodiment, the annular dimension can be reduced using another device or method, such as a transcatheter annuloplasty device, to create an annular diameter small enough.
Imaging [147] The present disclosure has the potential to allow an excellent real-time assessment and adjustment of the suture placement and tension during the procedure. Some modalities of the imaging method offer significant advantages in visualization, even in comparison to what is available during open heart surgery.
Optimizing tension [148] During correction of the open surgical mitral valve, the heart is stopped, flaccid and empty, so that the surgeon has to assess the movement of the dynamic structure based on his experience. The initial stage of the surgeon's assessment involves filling the ventricle with saline to push the mitral leaflets into a closed position and visually assessing the areas of leakage, prolapse and / or inadequate coaptation.
[149] This assessment may be limited because it is not performed on a beating heart, but the sutures are tied
Petition 870190083220, of 26/08/2019, p. 67/200
63/124 and trapped based on this assessment, then the atrium is closed, the heart is resuscitated, and the final assessment by echo or other heartbeat monitoring procedure is performed. If a problem is identified, the surgeon may need to stop the heart again, reopen the atrium and modify the previously completed correction. Due to the fact that sutures are tied and trimmed, they cannot simply be re-tensioned and therefore are usually replaced or additional artificial cords are added. In some modalities of the present disclosure, real-time echocardiographic evaluation is possible, since the suture stresses are being adjusted individually.
[150] In one embodiment, the method for implanting artificial cords includes the following steps: First, attach one end of a plurality of artificial cords to a leaflet of the mitral valve or annulus of the surrounding tissue and the other end to an anchor point. mechanically connected to the left ventricle; second, adjust the tension of the artificial cords, while visualizing an echocardiographic image and another image of the mitral valve.
[151] In some modalities of the method described above, echocardiographic imaging includes color Doppler evaluation of speed and / or flow. In some
Petition 870190083220, of 26/08/2019, p. 68/200
64/124 modalities, the echocardiographic image includes real-time 3D or 4D echo. In some embodiments, color flow Doppler and 3D images are fused or combined. In some modalities, the echo probe is placed through the patient's esophagus. In some modalities, the echo probe is a surface probe on the patient's chest and, in some modalities, the echo probe is within the patient's vascular system.
[152] In some modalities, at least 1, 2, 3, 4 or 5 of the functions below are confirmed under echocardiography, as the artificial cords are being tensioned. In another mode, the functions below are confirmed after the artificial strings are tensioned, but before the strings are permanently disconnected from the control system.
delivery, in what this can allow the new tensioning simplified, if required. • Free of movement of the brochure anterior systolic
causing obstruction or restriction of the left ventricular outflow tract • mitral valve gradient • appearance of regurgitating jets • speed of regurgitating jets • length of regurgitating jets • degree of MR
Petition 870190083220, of 26/08/2019, p. 69/200
65/124 • A minimum coaptation distance of at least 3, 5, 9, 12 or 15 mm is achieved across the entire coaptation line • Degree of leaflet prolapse or measure of the height that a portion of the mitral leaflet moves above the plane of the mitral valve • Areas of smoke or stasis within the atrial ventricle or atrial appendage • Maneuver between the left and right ventricles, especially at anchor sites or other septal sections [153] In addition, during the evaluation period after the initial tensioning of the sutures and before disconnecting the sutures from the delivery system, or before trimming the excess suture, while the suture tension is easily adjustable, at least 1, 2, 3, 4 or 5 among the following are evaluated :
• blood pressure • Cardiac performance • Real clotting time - ACT • ECG electrocardiogram • Cardiac enzymes ckmb and troponin • Clearance of coronary arteries • Fluoroscopic assessment of ventricular maneuver, potentially anchor or transventricular access.
• Fluoroscopic aspect of the ventricular anchor
Petition 870190083220, of 26/08/2019, p. 70/200
66/124 • Fluoroscopic position of the delivery system • Atrial pressure or wedge pressure • Oxygen content of the patient's blood [154] After the assessment step is completed based on the information obtained from the measurements, the doctor or staff can decide to make the results permanent or readjust the tension, add additional repair components or abort the procedure. In some modalities, the doctor also has the option of removing the entire implant. In other modalities, the doctor has the option of removing the portion of artificial cord from the implant, but the ventricular anchor remains implanted. In some modalities, the assessment step is further increased by including a stress echo component in which drugs, such as pressure regulators, are provided to the patient to adjust heart rate, heart rate and ventricular pressure to further assess how correction works in different hemodynamic conditions.
Monitoring [155] During the procedure, the patient is preferably under conscious sedation. This can make Transesophageal Echocardiography more challenging, but it minimizes the risk of anesthesia and allows patients to return home more quickly. With general anesthesia or
Petition 870190083220, of 26/08/2019, p. 71/200
67/124 conscious sedation during the procedure, conventional laboratory catheterization monitoring procedures should be performed, which include blood pressure, ECG, ACT, blood gases, etc. In addition, wedge pressure or left atrial pressure can be useful for this procedure. For this procedure, careful monitoring of blood pressure provides an early indicator of damage to the mitral valve apparatus, entanglement of the device in cords and / or damage to the septal wall. Measuring left atrial pressure can provide a simple quantifiable measure of improvement in mitral function without the challenges associated with obtaining the appropriate echocardiographic view.
Access [156] A blood vessel is accessed using standard conventional methods in interventional cardiology. Preferably, the vessel is a vein. In one embodiment, the vessel is the femoral vein. In another embodiment, the vessel is the radial or subclavian brachial vein. The access can be by a cut needle or percutaneous. In some embodiments, the container is prepared for closure by pre-insertion of a vascular closure device, such as Percolse or Prostar (Abbot Vascular) [157] A guide wire can be advanced, optionally with the use of a guide catheter, through a
Petition 870190083220, of 26/08/2019, p. 72/200
68/124 valve in the right ventricle. The device of the present disclosure can be advanced over the guide wire to a position close to the apex of the ventricle.
[158] A sharp curve can be created at the tip of the device. The curve can be oriented so that the exit lumen points towards the septal wall of the heart. The radius of curvature of the fully curved system is preferably less than about 3 to 30 mm, and the curvature is preferably positioned less than about 5 to 50 mm from the tip of the system.
[159] In one embodiment, this curve is created using a targetable catheter. Certain modalities of a directional catheter incorporate a traction wire that, when pulled, creates the internal radius of the catheter. Some embodiments also include a coil, braid and / or axial reinforcement.
[160] In another mode, the curve is created using coaxial sheaths with different shapes. For example, an outer sheath substantially straight or with a large radius of curvature close to its tip combined with an inner sheath with a small radius of curvature at its distal tip can be used. Advancing the inner sheath out of the outer sheath, the tip of the catheter creates the desired curve. If the curved hem is further advanced, a greater curved angle is obtained.
[161] In some embodiments, hems have
Petition 870190083220, of 26/08/2019, p. 73/200
69/124 different relative hardnesses at different points along its length. In certain embodiments, the outer sheath is curved to access the apex of the ventricle and stabilize through the vena cava. The shape that allows this can be about 7 to 50 cm behind the distal end of the sheath. The inner sheath can be substantially more flexible (for example, less than about 30, 50, 70, or 90% of the flexural stiffness per ASTM three-point bend test) than the outer sheath in the range of about 7 to 55 cm away from its distal tip. This allows the inner sheath to move in relation to the outer sheath, without substantially changing the orientation of the outer sheath in the heart and vena cava. The distal portion of the inner sheath is preferably more rigid than the section previously described, and rigid enough that, as it extends out of the outer sheath, it assumes its approximate shape, despite contact with the structures from heart.
[162] The device can be oriented so that the catheter outlet is close to the apex of the right ventricle, pointing towards the septal wall and, preferably, upwards, towards the mitral valve. The position of the sheath can be confirmed by imaging. A four-chamber echocardiographic view can be used in some modalities. A short geometric axis mitral view can be used in other modalities. Imagology
Petition 870190083220, of 26/08/2019, p. 74/200
70/124 fluoroscopic can be used in some modalities. Depending on the location of the area that needs correction, the desired drilling location can be selected, and the appropriate angle based on the planned orientation of the replacement ropes.
[163] In some modalities, a higher perforation, closer to the insertions of the papillary muscle and away from the ventricular apex is preferable. This location provides the benefit that as the heart remodels and the ventricular volume is reduced to more normal physiological levels, the tension in the cords will change less than with an almost apical fixation.
[164] A needle and / or an dilator can be advanced through the sheath or sheaths and through the septal wall of the heart. In some embodiments, a needle and an dilator are used together. Both the needle and the dilator can be pre-shaped with curvature close to the distal tip to ensure that the needle remains inside the left ventricle and avoids the mitral valve apparatus. The presence of the needle in the left ventricle can be confirmed with echocardiography, fluoroscopy and / or by the presence of pulsatile red (oxygenated) blood at the proximal end of the needle.
[165] After ventricular access is obtained, a guide wire can be advanced through the septum. In some
Petition 870190083220, of 26/08/2019, p. 75/200
71/124 modalities, the guide wire is further advanced through the mitral valve to the atrium and, in some modalities, it is further advanced into a pulmonary vein. The wire can be confirmed not to be entangled in the mitral apparatus using echocardiography and / or wire manipulation. In some embodiments, a device, such as a balloon or sheath, is advanced through the wire to confirm that the wire does not pass through the rope structure.
Ventricular Anchor [166] The present disclosure includes several modalities of ventricular anchors.
[167] In one embodiment, the ventricular anchor is similar to an Amplatz septal occlusion (ST Jude Medicai) consisting of a braided section that expands on both sides of the septal wall.
[168] In another embodiment, the anchor is a structure similar to a barbed stent intended to be positioned within the ventricular wall. The structure of the stent may be self-expanding or mechanically expandable (ie, expandable balloon) and may include barbed anchors similar to those found in stent grafts, such as Endurant (Medtronic) [169] In another embodiment, the anchor is a covered stent with flange, where the right ventricle side opens to a substantially flat configuration, oriented
Petition 870190083220, of 26/08/2019, p. 76/200
72/124 in a plane substantially perpendicular to the stent axis.
[170] In another embodiment, the flange is constructed from a ring around the circumference of the flange, and the flange itself is a layer of fabric. The flange can be collapsed into an elliptical shape and delivered through the lumen. The ring can be constructed from titanium and nitinol stainless steel or a chromium-cobalt alloy. A lumen of tissue can extend through the center of the flange to the transeptal perforation. After implanting the rope, the tension to fit the flange against the septal wall is provided through the strings, in some modalities. During the procedure, a part of the delivery system can be used to push the flange against the septal wall. In other embodiments, the fabric sleeve incorporates and anchors, such as a stent or splinter, for stabilization within the septal wall.
[171] The ventricular anchor can be positioned using a guide wire. After the anchor is positioned, the rope delivery anchors, and their delivery system, can be delivered through the ventricular anchor and through the guide wire.
Positioning [172] The identification of the correct place to place the new strings can be performed substantially with the use of echocardiography. The area of a regurgitant jet or a leaflet prolapse or instability can be identified
Petition 870190083220, of 26/08/2019, p. 77/200
73/124 using 2D or 3D echo and / or color flow Doppler. Preferably, a combination of these imaging modalities is used.
[173] The device for delivering the strings can be advanced through septal perforation. In some embodiments, the same targetable or moldable system used to create the septal perforation is advanced through the perforation. In other embodiments, it is a separate device that can pass through the other sheaths.
[174] The position of the distal tip of the device can be oriented in relation to the mitral structure, as follows. The device can be skewed more anteriorly, increasing the curvature of the system where it passes into the left ventricle through the septum. The device can be more skewed later, reducing the curvature of the system where it passes into the left ventricle through the septum. The device can be skewed from commissure to commissure by rotating the curved portion that passes through the sheath. The device can be biased atrially, extending, or ventricularly, retracting the distal portion of the device.
Primer [175] To replace the primary strings, the strings located near the free edge of the leaflet, various methods of engaging the mitral leaflet are possible. 0 system
Petition 870190083220, of 26/08/2019, p. 78/200
74/124 of bulky knots used by Harpoon Medicai can be used in one modality. The loop suture used by Neochord Inc. can be used in another modality. Both methods seem to work well in the initial clinical experience. The preferred modalities are intended to replicate the clinically proven suture tissue interfaces that were developed in the open surgical experience.
[176] Another modality can use a bifurcated catheter. One side of the catheter engages under the leaflet, and that side can be pushed in to help identify the area of the leaflet where the suture will pass. The other side passes into the atrium. A needle or pair of needles punctures the leaflet on the first side of the catheter, and a loop-type catheter captures the needles or needle suture on the second side of the catheter. In some embodiments, a looped end of the suture is passed over the loop, so that when the tip of the suture needle is pulled back, it forms a joint of the circumference. In other embodiments, the end of the suture loop is twisted and folded twice, forming a knot known as a prusik or double perimeter joint.
Secondary [177] To replace secondary cords, those that are located further behind the free edge of the booklet, some of the devices and methods described for
Petition 870190083220, of 26/08/2019, p. 79/200
75/124 replacing the primary strings may need adaptation. The bulky knot anchoring method may be appropriate to replace secondary ropes without modification.
[178] The bifurcated catheter method may be appropriate for replacing secondary cords with a small adaptation to allow the side of the loop catheter to perforate the leaflet.
Similar Dryness [179] During repair of the mitral valve, surgeons often dry out part of the leaflet tissue. A similar effect can be created using the bifurcated catheter system described above. By placing the suture through a cut of the leaflet and joining the tissue, as the suture is tightened, a similar effect can be achieved. The suture can be seen close to the leaflet to just dry out, or extended and used as a new rope as well.
Partial annuloplasty [180] In some cases, it may be desirable to use the double perforation method at the annulus near the point of articulation of the leaflet to create a result similar to a surgical suture annuloplasty. In some modalities, a series of suture loops are created, surrounding the entire annulus. In some modalities, the suture loops are created only in a safe area, away from the aortic valve,
Petition 870190083220, of 26/08/2019, p. 80/200
76/124 of the coronary arteries and conduction pathways. In some embodiments, suture loops are created in areas where the heart is more likely to dilate (that is, in an area of anterior infarction) or in an area close to the mitral commissures.
Evaluation [181] After one or more correction sutures are placed in the mitral structure, the result can be evaluated. The tension is applied selectively to each artificial rope, until the desired movement is achieved. Preferably, a target coaptation height is achieved by echocardiography. In some modalities, such as excessive tension and very small tension are balanced, the sutures are slightly tensioned to allow remodeling to occur.
Tying [182] In one embodiment, sutures are tied to the right ventricular side of the anchor, using a knot that can be crimped, large enough to prevent the crimped knot from passing through an opening in the anchor.
[183] In another modality, the artificial cords are beaded directly in a stitched suture or tied to the anchor.
Suture Adjustment [184] In some modalities, artificial tension
Petition 870190083220, of 26/08/2019, p. 81/200
77/124 of the string can be adjusted in a similar procedure. In some modalities, this can be achieved entirely from the right ventricle, without crossing the septum again. In one embodiment, the crimped knots are threaded, removed from their base and twisted. The twisting movement of the suture of the pair of sutures that form the artificial cord effectively shortens it. In another embodiment, the crimp knot is attached and pulled, and an additional crimp knot is placed over it.
Multiple Systems [185] In some modalities, it is possible to attach up to 1 to about 10 artificial cords to a single septal anchor. In some modalities, more than one ventricular anchor is used, either to optimize the direction of traction of the cords, or to minimize the load on the septal anchor.
Alternative Methods [186] For some patient anatomies, it may be necessary or desirable to anchor the cords in a different area of the left ventricle, instead of the septal wall. In one embodiment, the anchorage location is in the papillary muscle. Preferably, suture fixation to the papillary muscle or to the ventricular wall is done by creating a suture in eight, as is usually done by surgeons during the replacement of open cords. This type of anchor can be placed by a transcatheter method through the
Petition 870190083220, of 26/08/2019, p. 82/200
78/124 transeptal ventricular perforation described above, or it can be placed through a more conventional atrial transeptal perforation. One modality of the system, adapted for suturing to the papillary muscles, is a simple change to the bifurcated leaflet suture system, in which the ends of the needle and the handle-type catheter are curved inwardly, towards each other, so that , when activated, they can place a suture through a papillary muscle. In another embodiment, the ventricular anchor is a corkscrew-shaped anchor, similar to an Aptos Endovascular clamp (Medtronic Inc) or any of the configurations used to secure the pacemaker electrodes.
Rescue [187] In some modalities, the ventricular anchor is recoverable. An example is a self-expanding recapturable stent, or an Amplatz-like device.
[188] In some modalities, artificial cords are recoverable through a period of hemodynamic evaluation. In one embodiment, this is achieved by pulling both ends of the suture for evaluation, before engaging the perimeter joint for permanent implantation.
Alfieri Concurrent Correction Rings [189] In some modalities, the procedure is performed in conjunction with another correction procedure for the
Petition 870190083220, of 26/08/2019, p. 83/200
79/124 mitral valve. This simulates the multiple techniques normally used by surgeons. There are several devices in clinical use that simulate annuloplasty rings, such as cardiac sinus approaches, approaches based on Mitralign and Valtech sutures, etc. In addition, Mitraclip (Abbott) simulates an Alfieri stitch, a rarely used surgical technique that creates two holes.
Device [190] Certain modalities of the device include an external sheath that is curved to engage the shape of the vena cava and the right ventricle. The proximal end of the outer sheath is connected to the delivery system handle. Inside the external sheath there is a conventional dilator to gain vascular access. Once the right ventricle has been accessed, the dilator is replaced by a special transventricular dilator, with a relatively flexible proximal portion and a more rigid and curved distal portion with a short, conical radio opaque tip. The handle may include a provision for locking the dilator, preventing axial and rotating movement. The internal diameter (Dl) of the dilator allows the release of a long needle, preferably flexible and hollow. In some embodiments, the needle is curved. The needle can be configured to allow the tip of the needle to advance through the distal tip of the dilator and
Petition 870190083220, of 26/08/2019, p. 84/200
80/124 place precisely the transventricular perforation. In some embodiments, the needle is sized to accommodate a guide wire of 0.0233, 0.036, 0.046 or 0.089 centimeters in diameter (0.009, 0.014, 0.018 or 0.035 inches in diameter). In other embodiments, the dilator is advanced through the perforation and through the needle, and the needle is removed. In some embodiments, the needle is an integral part of the dilator and can be retracted into the dilator or extend for a limited length posterior to the tip of the dilator. In some embodiments, the length can be about 2 to 20 mm. In other embodiments, the length can be about 4 to 40 mm. In some embodiments, the length may be less than about 2 mm or greater than about 40 mm.
[191] An exemplary application of the preceding description is discussed below, in connection with Figures 35A to 350. With reference to Figure 35A, a catheter 100 (also here called an elongated flexible tubular body) that has a distal end and a proximal end . The distal end of the catheter 100 entered the left atrium 102 using conventional techniques. Catheter 100 is advanced through mitral valve 104 into the vicinity of apex 112 of left ventricle 106. A tissue anchor 108, such as a helical tissue anchor 110, is rotated on the muscle wall by an anchor trigger (not shown) ,
Petition 870190083220, of 26/08/2019, p. 85/200
81/124 which may be in the form of a rotary actuator (not shown) distally advanced through catheter 100. In certain embodiments, the anchor actuator or rotary diverter can extend proximally through catheter 100. After anchoring the tissue anchor 108, catheter 100 and / or the anchor driver is retracted proximally to
leave the anchor 110 pre to the wall and fixed in an suture in anchorage 114 what if extends proximally to long of length of catheter 100. One distal portion gives suture in
anchorage 114 can carry a neopapillary muscle 116 which may comprise a soft ribbon or soft body 118, which optionally approaches the size of a mitral papillary muscle. Neopapillary muscle 116 can comprise a substantially larger diameter compared to suture 114. Suture 114 can be configured to extend through neopapillary muscle 116 (for example, through a central channel) or can be attached to a proximal end neopapillary muscle, as described in this document, in another location. In certain embodiments, the replacement of the neopapillary muscle 118 may be formed of soft PTFE material.
[192] Preferably, anchor 108 is fixed at a point that is displaced from the thin tissue of the apex 112 and is instead implanted in the generally thicker adjacent wall of the ventricle. The positioning of the anchor is
Petition 870190083220, of 26/08/2019, p. 86/200
82/124 preferably also so that the longitudinal geometric axis of the implanted neocord construction is aligned approximately parallel or concentric with the original path of the native rope. In such arrangements, tissue anchor 108 can be positioned in the left ventricle, between the papillary muscles. As noted and described in this document, the tissue anchor may be in the form of a helical ventricular anchor.
[193] Referring to Figure 35B, a targetable leaflet capture catheter 120 can be advanced distally beyond catheter 100, through mitral valve 104 and into left ventricle 106. Targetable catheter 120 can be delivered through catheter 100. Alternatively, the directional catheter 120 can be delivered beside the catheter 100. In certain embodiments, the directional leaflet capture catheter 120 can be positioned inside the catheter 100, along the actuator (for example, rotary actuator) coupled to the anchor of tissue (for example, a helical ventricular anchor). In certain embodiments, the actuator (for example, rotation actuator) coupled to the tissue anchor (for example, a helical ventricular anchor) can be inserted through catheter 100 and, after implantation, removed or partially removed from catheter 100. The addressable leaflet capture catheter 120 can then be advanced through catheter 100 to the
Petition 870190083220, of 26/08/2019, p. 87/200
83/124 place of destination.
[194] A distal portion of the leaflet capture catheter 120 can be provided with a bypass zone 122. The bypass zone 122 can comprise any variety of bypass mechanisms. For example, a plurality of transverse slits 124 may be spaced along a first side of catheter 120. A second opposite side 126 of the catheter may comprise an axially non-compressible spine. Proximal retraction of one or more traction wires (not shown) can cause the axial collapse of slits 124, thereby deviating the catheter, as shown, for example, in Figure 35C. Slots 124 can be specifically configured to allow the types and ranges of movement suitable for inserting the leaflet anchor.
[195] Preferably, the deviation zone 122 can be deflected over an angle of at least 160 ° and, preferably, at least 180 ° or about 190 °, or more, in a single or compound curve, and have a best-fit radius of curvature less than about 2 cm and, in one embodiment, less than 1.5 and, preferably, less than about 1 cm in one embodiment. In an implantation, the shortest linear distance D between the distal tip 128 and the catheter axis is within the range of about 0.5 cm and about 1.5 cm and approximately, ideally, 1 cm,
Petition 870190083220, of 26/08/2019, p. 88/200
84/124 to position the leaflet anchor at a desired indentation from the leaflet's coaptive edge.
[196] The targetable leaflet capture catheter 120 can be advanced through mitral valve 104 and deflected, as shown in Figure 35C, to position distal tip 128 in contact with a ventricular side 130 of an unstable leaflet 132.
[197] As shown in Figure 35D, a control in a proximal tubing can be manipulated to advance a needle 134 out of distal end 128 and through unstable leaflet 132. Perforation of leaflet 132 through needle 134 can be performed during diastole , when leaflet 132 is skewed towards the left ventricle 106.
[198] Catheter 120 and / or needle 134 can be used to position any of a variety of tissue anchors to attach a suture to leaflet 132. In certain embodiments, as described in this document, the tissue anchor is a radially expandable leaflet anchor attached to a suture that can extend proximally through catheter 100. In the illustrated embodiment, a pledget 136 carried by a leaflet anchoring suture 138 is positioned from needle 134, on the atrium side of leaflet 132 The pledget is in the form of an elongated ribbon, which has a proximal end and a
Petition 870190083220, of 26/08/2019, p. 89/200
85/124 distal end. The distal end is attached to the leaflet anchor suture 138. Leaflet anchor suture 138 can be passed through one or two or four or more openings in the elongated ribbon. As seen in Figures 35E to 35G, the proximal retraction in the anchor suture of leaflet 138 causes the tape to fold and collapse axially, thus forming a mass of sufficient transversal area, so that the proximal tension in the suture of the leaflet is insufficient to pull the resulting pledget through the leaflet. Therefore, in certain arrangements, pledget 136 is transformable from an elongated strip configuration to a radially enlarged configuration, axially shortened by proximal retraction of suture 138.
[199] The leaflet capture catheter 120 can then be retracted proximally, leaving the construction as shown in Figure 35H.
[200] Any of a variety of leaflet anchors can be used, generally sharing the characteristic of being laterally expandable from a low crossing profile to traverse the leaflet, to a larger cross section to resist retraction back through the flyer. Lateral enlargement can be performed by tilting a T anchor or by active deformation by a control wire or elastic deformation after the release of
Petition 870190083220, of 26/08/2019, p. 90/200
86/124 a restriction.
[201] Figures 351-1 to 351-4 illustrate the placement of a T-type anchor through the unstable leaflet 132. An anchor, such as a simple T-bar 140 attached to suture 138, can be distally advanced through needle 134 by a push wire 142. The push wire 142 can be provided with a distal push platform 144, which can be provided with a cut 146 to accommodate suture 138. As the bar 140 comes out of needle 134, it will rotate around the suture fixation point and sit against the atrium side of leaflet 132, when proximal traction in leaflet suture 138. Bar 140 can comprise a single element, as shown, or an X construction or a multi-support construction, depending on the desired performance characteristics.
[202] An alternative booklet anchor is illustrated in the sequence of Figures 35J-1 to 35J-3. The fabric anchor comprises a cube 150 attached to the suture 138. The cube 150 carries a plurality of spokes 152 which are expandable transversely from a linear low profile configuration, when limited within the needle 134, to an expanded configuration illustrated in Figure 35J-3 to resist proximal retraction through leaflet 132. At least two, and preferably four, or six, or more
Petition 870190083220, of 26/08/2019, p. 91/200
87/124 spokes or supports 152 can be provided, extending radially outward from the hub 150 in the positioned configuration, to provide an occupied area against the leaflet. The brackets can be tilted radially outward in the proximal direction to provide a shock absorber, allowing hub 150 to be transiently pulled closer to leaflet 132 in response to voltage spikes, such as when leaflet 132 reaches the travel limit during the systole imposed by the implanted neocords. The spokes 152 and the cube 150 can be laser cut from a NiTi tube and bonded, crimped or otherwise fixed to the leaflet suture 138.
[203] With reference to Figure 35K, a fulcrum 154 can be positioned around the distal end of the neocord and the proximal end of the neopapillary muscle. Fulcrum 154 can provide a point at which the length and / or tension between leaflet anchor 136 and distal anchor 110 can be adjusted. At least the leaflet suture 138 passes through the fulcrum, so that the proximal retraction in the leaflet suture 138 pulls the boundary of the atrium from the unstable leaflet path towards the ventricle. Fulcrum 154 may be the edge of a distal opening of a lumen of an adjustment catheter that is advanced distally through the leaflet suture and potentially also to the ventricular anchor suture. The fulcrum can alternatively
Petition 870190083220, of 26/08/2019, p. 92/200
88/124 comprise an eye or a loop at the distal end of a fulcrum support, such as a hypotube or support wire. Alternatively, fulcrum 154 can be in a suture lock, through which both the anchor suture and the leaflet suture can pass.
[204] Before engaging the suture lock, the leaflet suture can be retracted proximally slowly to progressively limit the prolapse of the unstable leaflet in the left atrium. Mitral regurgitation can be observed using fluoroscopic imaging, and the suture of the leaflets can be retracted until mitral regurgitation (MR) has been eliminated or sufficiently minimized.
[205] Referring to Figure 35L, catheter 100 can be advanced distally to induce looseness in the anchor suture and leaflet suture, thereby minimizing any influence of catheter 100 on leaflet function. This allows the doctor to assess the effect of mitral regurgitation on the current tension level in the leaflet suture. The leaflet suture can be retracted or advanced to further adjust the leaflet's travel range as desired.
[206] Once the desired cardiac function has been achieved, the suture lock can be used, using known techniques or techniques revealed in the present document, elsewhere, to fix the maximum distance between the tissue anchor 108 and the booklet anchor as
Petition 870190083220, of 26/08/2019, p. 93/200
89/124 shown in Figure 35M. Alternatively, if the adjustment catheter is used as a fulcrum, a lock or suture knot can be advanced distally through the catheter to the position in the vicinity of the distal end of the neocord and the proximal end of the neopapillary muscle, and previously attached to retract the adjustment catheter.
[207] Referring to Figure 35N, leaflet suture 138 and anchor suture 114 can be cut proximally to the suture lock, using known techniques or techniques described elsewhere in this document, and catheter 100 can be removed from the patient. This leaves a neopapillary and neocord muscle building in place within the left ventricle.
[208] Referring to Figure 350, a distal bypass zone 122 is illustrated on a modified leaflet capture catheter 120. As with the bypass zone illustrated in Figure 35C, the implantation of Figure 350 includes a plurality of slits axially compressible 124 opposite a non-collapsible spine 126. In the proximal retraction of a traction wire, this construction produces a primary concavity 150. As discussed, the shortest distance D in the maximum flexion of the deviation zone 122 can generally be in the range of about from 0.5 to about 1.5 cm.
[209] Depending on the desired performance, a secondary concavity 152 operable by means of
Petition 870190083220, of 26/08/2019, p. 94/200
90/124 of the axial collapse of the second plurality of slits 154. The flexion of the secondary concavity 152 can be performed by proximal retraction of a second traction wire. Alternatively, the primary concavity 150 and the secondary concavity 152 can be flexed simultaneously by pulling a single pull wire.
[210] In the illustrated embodiment, the secondary concavity 152 is concave in the same plane, and in an opposite direction from the primary concavity 150. Alternatively, the second concavity 152 can be concave in the same direction as the primary concavity 150. In either configuration , the primary concavity may reside in the foreground, and the secondary concavity 152 may reside in a rotatingly displaced background from the
first plan depending on of performance wanted. The Details additional of axes in catheter curvature in compound can be observed at Publication Patent n ° 2014/0243877, whose revelation is incorporated to the present
document in its entirety as a reference.
[211] Referring now to Figures 36A to 37, in some modalities, instead of treating pure degenerative mitral regurgitation, the modalities of the method and devices described in this document can also be used to treat a subset of patients with functional mitral regurgitation, in which patients have a
Petition 870190083220, of 26/08/2019, p. 95/200
91/124 type of leaflet defect stuck. In this anatomy, there is an adequate length of the mitral valve leaflets for the leaflets to close and be sealed against leakage, but the leaflets are not able to move to the plane of the mitral annulus because the cords are too short. This type of anatomy typically occurs because the annulus dilates and / or the ventricle enlarges, while the cords remain approximately the same length. The treatment of these patients can be carried out by cutting all or a part of the native cords as a step during the procedure.
[212] In one embodiment, the step of cutting the rope is performed as the initial step, prior to the implantation steps of the device. This can avoid the possibility of accidental damage to the implant, but it can create a severe regurgitation condition during the procedure. Alternatively, native strings can be cut at any point during implantation of prophetic strings, or after the other stages of implantation of prophetic strings are completed. The cut, as a final step, can create the disadvantage of not being able to evaluate the exact result, until the strings have been implanted. The implanted device can be the same or similar to one of the modalities disclosed in this document.
[213] In certain embodiments, native strings can be cut after placing the initial leaflet and
Petition 870190083220, of 26/08/2019, p. 96/200
92/124 ventricular anchors, but before final tensioning. In certain modalities, this is achieved first, before the implantation of strings, isolating the native strings, passing a guide wire around each papillary muscle, capturing the end of the wire and then advancing a sheath through the wire is created, thereby creating a tight loop around the papillary muscles. These loops can remain intact during the normal implantation of ventricular anchors and leaflets. Once the ventricular and leaflet anchors are in place, using one of the devices and methods described in this document and, preferably, partially tensioned, the native cords are cut. This can be achieved by manipulating the loops around the papillary muscles, so that they move from the papillary heads to the base of the strings and cut them. In one embodiment, the guide wire is simply pulled into the guide, creating a cutting action. In another embodiment, a blade-type tool that fits inside the guide and has lumens for the guide wires to be supplied. By pulling both ends of the guide wire, the strings are pulled against the blade and cut. Many other tissue cutting devices have been described in the art, and would be applicable to the devices and method described in this document. After the native strings are cut, the tension in the
Petition 870190083220, of 26/08/2019, p. 97/200
93/124 implant is adjusted. If the result is satisfactory, it can become permanent, blocking the suture lock and cutting the suture tails, as described in this application or by similar methods. If the result is not satisfactory, additional strings can be added or other repair and correction procedures can be performed together.
[214] Making a loop on the papillary muscle, instead of looping the strings directly, can ensure that all strings are captured, because all normal strings attach to the heads of the papillary muscles. Cutting using a loop guide wire is a method of cutting native strings, but other methods and devices can be used, such as various types of transvascular suture cutters.
[215] Referring now to Figures 36A to 37, Figure 36A is an image of a looped papillary muscle 200 in the configuration in which it is captured for the first time. Figure 36B shows the handle papillary 200 pulled upwards, through the strings 202, in the area where the cutting step is preferably performed. Figure 37 illustrates a string cutting tool embodiment 210. The illustrated embodiment contains two lumens 212, 214, one for each end of a handle guide wire 216, a cutting edge 218 and an element 220 to protect the edge cutting edge 218 against contact with sheath 210 and other parts of the
Petition 870190083220, of 26/08/2019, p. 98/200
94/124 device and patient that are not intended to be cut. The guide wire can be delivered through a first lumen 212 and a loop-type catheter delivered through the second lumen 214 to wrap the guide wire after making a loop around the papillary muscle. The loop catheter can withdraw the guide wire in the second lumen 214. As noted above, cutting using a loop guide wire is a method of cutting native strings, but other methods and devices can be used, such as various types of transvascular suture cutters.
[216] In some embodiments, the procedures described in this document can be performed using specialized delivery systems and devices. Delivery systems can comprise multiple subcomponents configured to perform various steps in the procedure. In some modalities, a tendon neocord positioning system, which comprises an elongated, tubular, flexible body, such as catheter 100, can be used to access the patient's heart (for example, the left atrium). Multiple subsystems can be introduced into the heart via delivery catheter 100. Subsystems can comprise catheters of a smaller diameter than the inner lumen of delivery catheter 100, so that they are configured to be inserted through delivery catheter 100. In some deployments, some or
Petition 870190083220, of 26/08/2019, p. 99/200
95/124 all the various subsystems can occupy the delivery catheter 100 simultaneously, in order to carry out the operations described in this document, in another location. In some deployments, some or all of the various subsystems may subsequently occupy the delivery catheter 100, in order to perform the operations described in this document, elsewhere. For example, the delivery system may comprise a ventricular anchor delivery system 300, a leaflet anchor delivery system 330 and / or a suture lock delivery system 370, as described herein, elsewhere. Figures 38A to 38H schematically illustrate a method of implanting a tendinous neocord through a delivery system that comprises subsystems for delivery of ventricular anchor, delivery of leaflet support and delivery of suture lock. The procedure illustrated in Figures 38A to 38H can be the same or substantially the same as illustrated in Figures 35A to 350. In some embodiments, the tendinous neocords (or prophetic tendinous cords) comprise a suture, as shown in Figures 38A to 38H. In other modalities, the tendinous neocords may be another flexible element. The flexible element can be attached to a suture at its proximal end and / or at its distal end for coupling with ventricular and / or leaflet anchoring.
Petition 870190083220, of 26/08/2019, p. 100/200
96/124 [217] Figure 38A depicts the installation of a helical anchor 302 close to the apex 112 of the left ventricle 196. Although helical anchor 302 is shown positioned close to apex 112 in the following Figures, anchor 302 can be attached to a point that is displaced from the thin tissue of the apex, and can be implanted in the adjacent wall, which is usually thicker in the ventricle, as between the two papillary muscles. The positioning of the anchor is also preferably so that the longitudinal geometric axis of the implanted neocord construction is aligned approximately parallel or concentric with the original path of the native rope. In such arrangements, tissue anchor 302 can be positioned in the left ventricle between the papillary muscles, as shown, for example, in Figure 42. In addition, although a helical anchor is illustrated, the anchor may have a different structure for engaging to the heart tissue and thus, as explained above, other structures can be used instead of a helical structure that includes various perforation or hook structures to engage the tissue.
[218] Helical anchor 302 can be delivered by a ventricular anchor delivery subsystem 300. Figures 39A to 39C illustrate various views of the ventricular anchor delivery subsystem 300 and its components. THE
Petition 870190083220, of 26/08/2019, p. 101/200
97/124
Figure 39A represents a perspective view of a distal end of subsystem 300. Figure 39B represents a perspective view of a proximal end of subsystem 300. Figure 39C represents a partially exploded view of a distal end of subsystem 300. Subsystem 300 can be delivered via delivery catheter 100. Delivery catheter 100 can access the left atrium using conventional techniques, such as through an atrial transeptal perforation. Delivery catheter 100 can be held in a substantially constant location throughout the procedure, as several subsystems are placed and removed from delivery catheter 100. For example, the distal end of delivery catheter 100 can be positioned in the left atrium. . In other implantations, the distal end of the delivery catheter 100 can be positioned in the left ventricle for the entire duration of the procedure.
[219] As shown in Figures 39A and 39C, the ventricular anchor delivery subsystem 300 may comprise an outer sheath 304, a guide shaft 305, a driver 309 (comprising shaft 307 and head 306), a hub of anchor 308 and an anchor. The anchor can be a helical anchor 302 and the driver 309 can be configured to rotate the anchor 302, so that the driver 309 is configured to rotate the helical anchor 302. The anchor
Petition 870190083220, of 26/08/2019, p. 102/200
Helical 98/124 302 can comprise an inner diameter configured to be received through the outer diameter of an anchor hub 308. Helical anchor 302 can be securely attached to anchor hub 308 by an interference fit or other engagement by friction. Anchor hub 308 can be left implanted together with helical anchor 302. Anchor hub 308 can comprise a lumen positioned substantially along a central geometric axis of anchor hub 308 to receive a suture 311 (not shown) and fix suture 311 to helical anchor 302. In some embodiments, suture thread 311 may comprise a fixing element (for example, a knot or washer) with a diameter sized to prevent suture 311 from being pulled proximally through the anchor hub lumen 308. For example, suture 311 can be tied to a distal side of the lumen. In some embodiments, the suture thread 311 can be tied to the anchor hub 308 (for example, passed through the lumen, wrapped around the outer surface, and tied to itself). Helical anchor 302 may comprise a distal winding section and a proximal winding section. The proximal section of the windings can be more spaced than the distal section of the windings, and can be configured to attach the helical anchor 302 to the anchoring hub 308. The distal winding section can be more
Petition 870190083220, of 26/08/2019, p. 103/200
99/124 farther than the proximal winding section and can be configured for insertion into ventricular tissue. The anchor hub 308 may comprise an enlarged cross section at its proximal end configured to abut the helical anchor 302 and / or prevent the helical anchor 302 from advancing proximally through the proximal end of the anchor hub 308. Other helical anchors, as described in this document, elsewhere, they can be configured for use with the ventricular anchor delivery subsystem 300 also described in this document.
[220] The proximal face of helical anchor 308 may comprise a recess to receive an extension portion 306 'from the actuator head 306. The recess may be non-circular (for example, oblong or polygonal), so that it is configured to transfer the torque of the driver 309 to the anchor hub 308, after the rotation of the driver 309. The recess can be positioned around the central lumen of the anchor hub 308. In other embodiments, the anchor hub 308 can comprise an extension portion , and the driver 306 may have a recess. The driver head 306 can be generally cylindrical. The driver head 306 can be fixedly coupled to a drive shaft 307. The driver 309 can comprise a central lumen through the head
Petition 870190083220, of 26/08/2019, p. 104/200
100/124 driver 306 and drive shaft 307 configured to receive suture 311. The central lumen of driver 309 can be configured to be aligned with the central lumen of anchor hub 308. Drive shaft 307 can be received within a guide shaft 305. The diameter of the drive head 306 can be larger than the inner diameter of the drive shaft 305. The outer sheath 304 can be sized to receive the guide shaft 305 as well as the drive head 306, the anchor hub 308 and helical anchor 302.
[221] The outer sheath 304 can be delivered to the left ventricle and proximal to the ventricular fixation site through the delivery catheter 100. In some embodiments, the outer sheath 304 can be delivered without a delivery catheter. In some deployments, helical anchor 308 can be hidden within outer sheath 304 until outer sheath 304 is positioned proximal to the ventricular attachment site and then pushed distally through outer sheath 304 so that helical anchor 302 is exposed. Helical anchor 302 can be placed in contact with the ventricular tissue. Rotation of the drive shaft 307 can cause the drive head 306, anchor hub 308 and helical anchor 302 to rotate, thereby screwing ventricular anchor 302 into the ventricular tissue. The rotation of the driver
Petition 870190083220, of 26/08/2019, p. 105/200
101/124
309 can actuate axially the actuator 309, the anchor hub 308 and the helical screw 302 in a distal direction, in relation to the outer sheath 304. The drive shaft 307 can be rotated manually by a user, using a drive handle 312, as shown in Figure 39B. The proximal end of the ventricular anchor delivery subsystem 300, as shown in Figure 39B, can comprise first and second hemostasis valves 314, 316. The first hemostasis valve 314 can be positioned distally to the drive handle 312 and can provide access to the guide shaft 305. The second hemostasis valve 316 can be positioned proximal to the drive handle 312 and can provide access to the central lumen of the driver. The ventricular anchor suture 311 can extend through the second hemostasis valve 316.
[222] In some embodiments, the ventricular delivery subsystem 300 may include a sheath or shroud 303 (shown in Figure 38A) positioned around the distal end of the outer sheath 304. Shroud 303 may comprise a tubular wall that is fixed or extends outward the tubular sheath 304, which has an open distal end. Protection 303 can be extended from a reduced first cross-section for transluminar navigation to a expanded second cross-section to allow the rotation of the existing anchorage in it.
Petition 870190083220, of 26/08/2019, p. 106/200
102/124 [223] Shield 303 may have an increasing diameter in the distal direction, so that the inner diameter of shield 303 is larger at the distal end of shield 303 than the outer diameter at the distal end of outer sheath 304. The diameter expanded protection 303 can provide enough space for the rotation of helical anchor 302 without coming into contact with an inner surface of protection 303. Protection 303 can be placed in contact with ventricular tissue or positioned in close proximity to ventricular tissue during the installation of helical anchor 302. The guard 303 can advantageously prevent the ropes or other fabric adjacent to helical anchor 302 from being caught in the windings of helical anchor 302 during the rotary insertion of helical anchor 302. Once helical anchor 302 is inserted in the ventricular tissue at an appropriate depth, the driver 309 can be removed from the anchor 308, so that helical anchor 302 is disengaged from the rest of the ventricular anchor delivery subsystem 300.
[224] In some deployments, the insertion portion 306 'of the driver head 306 and the recess in the anchor hub 308 may have a friction engagement that holds the two components together. The friction coupling can be overcome in the proximal retraction of the actuator by an opposite force of the ventricular tissue, since the helical anchor 302 is
Petition 870190083220, of 26/08/2019, p. 107/200
103/124 inserted. In some deployments, the proximal tension in the suture 311 can provide an engaging force between the proximal hub 308 and the driver head 306, which can be released after retraction of the driver 309. The driver head 306 can be removed proximally inward outer sheath 304, before outer sheath 304 is removed for delivery catheter 100.
[225] The non-implanted components of the ventricular anchor delivery subsystem 300 can be removed from delivery catheter 100, and subsequent subsystems can be placed on delivery catheter 100 to complete the implantation of the neocords. In a modified embodiment, the ventricular anchor delivery subsystem 300 and subsequent subsystems, such as the leaflet anchor delivery subsystem 330, can be positioned inside the delivery catheter 100 at the same time, and, in a certain arrangement, tissue and leaflet anchors can be pre-loaded into the delivery catheter. In alternative modalities, the implantation of the ventricular anchor device can be performed in a different order (for example, after implantation of the leaflet anchor). The ventricular anchor delivery components can be retracted proximally through a proximal end of suture 311, which can remain extending through the delivery catheter 100 to ventricular anchor 302. The
Petition 870190083220, of 26/08/2019, p. 108/200
104/124
Figures 38A to 38H describe the installation of a neocord without a neopapillary muscle 116, as shown, for example, in Figure 35A. However, the procedure can also be performed in combination with a neopapillary muscle 116. Neopapillary muscle 116 can be advanced through suture 311, for example, after the installation of ventricular anchor 302. In some modalities, the neopapillary muscle can be attached to the anchor hub 308.
[226] Figures 38B to 38F represent several steps that comprise the installation of the leaflet anchor through a leaflet anchor delivery subsystem 330. The leaflet anchor can be delivered after the installation of the ventricular anchor. The leaflet anchor delivery subsystem 330 can be delivered via delivery catheter 100, next to the ventricular anchor suture 311, which remains connected to the ventricular anchor 302. In some embodiments, the leaflet anchor can be delivered prior to installation of the ventricular anchor 302. The leaflet delivery subsystem 330 can alternatively be delivered through the ventricle wall, such as transapically to the left ventricle, or transeptally, from the right ventricle to the left ventricle.
[227] Figures 40A to 40F illustrate various views of the booklet anchor delivery subsystem 330 and its components. Figure 40A represents a perspective view
Petition 870190083220, of 26/08/2019, p. 109/200
105/124 of a distal end of subsystem 330. Figure 40B represents a perspective view of a proximal end of subsystem 330. Figure 40C represents an exploded view of the distal end of subsystem 330. Figure 40D represents a perspective view of a flexible tube 332. Figures 40E and 40F represent different side views of a transition region of flexible tube 332.
[228] As shown in Figures 40A and 40C, the booklet anchor delivery subsystem 330 can comprise a delivery shaft 334. A divertable flexible tube 332 can be coupled to the distal end of the delivery shaft 334. Figure 40D represents a implantation of flexible tube 332. The deflectable flexible tube 332 can form a deviation zone 122, as described in the present document, in another location. The divertable flexible tube 332 can be configured to be steerable by an operator, as described in this document, in another location, such as by proximal retraction of one or two or more pull strands (not shown), along several sides of the flexible tube 332. The operator can control flexion of the flexible tube using a button 352 or a lever, or other actuation mechanism positioned on a handle 350 at the proximal end of the booklet anchor delivery subsystem 330, as shown in Figure 40B .
[229] As shown in Figure 40D, the tube
Petition 870190083220, of 26/08/2019, p. 110/200
106/124 flexible can comprise transverse grooves. The transverse grooves can be positioned in various lengths of the flexible tube 332, substantially opposite one side of the flexible tube 332, which does not comprise any opening or groove, to form a relatively rigid or axially incompressible spine. The axial spacing of the transverse grooves, the axial width of the transverse grooves, the shape of the transverse grooves, the circumferential orientation of the transverse grooves and / or the circumferential length of the transverse grooves can affect the degree of flexibility and / or the direction that the flexible pipe 332 is prone to flex in a local area or generally along the entire length of flexible tube 332.
[230] Flexible tube 332 can comprise two or more sections along the length of flexible tube 332, with different transverse groove patterns and / or different bending properties. For example, the flexible tube 332 shown in Figure 40D comprises a proximal section and a distal section that has different transverse groove patterns. Figures 40E and 40F show side views in the foreground of flexible tube 332, close to the transition between the proximal section and the distal section. The views in Figures 40E and 40F are approximately rotated by 90 degrees from each other, in relation to the longitudinal geometric axis of the flexible tube 332.
Petition 870190083220, of 26/08/2019, p. 111/200
107/124 [231] Flexible tube 332 can be used to direct or guide the distal end of the booklet anchor delivery subsystem 330, to the booklet. The flexible tube 332 can be especially advantageous for positioning the distal end on the ventricular side of the leaflet, when the subsystem is delivered to the heart, from the right atrium. As shown in Figure 38B, the distal end of the leaflet anchor delivery subsystem 330 can be offset (for example, at least about 180 degrees), so that the proximal retraction of the subsystem exerts pressure on the ventricular surface of the leaflet. The best fit radius or radius of curvature of the deflected flexible tube 332 is generally less than about 2 cm, and preferably less than about 1.5 cm or 1.0 cm.
[232] A flexible liner 333 can wrap flexible hose 332 and delivery shaft 334. An internal flexible shaft 336 that terminates at a distal end with a needle tip can extend through delivery shaft 334 and flexible pipe 333 The inner flexible shaft 336 can comprise a braided tube or catheter that is flexible enough to fit the shape of the flexible tube 332. A needle tip 338 can be attached to the distal end of the inner flexible shaft 336. The proximal end of the shaft internal flexible 336 can be connected to a needle handle 354, as shown in Figure 40B. The 354 needle grip
Petition 870190083220, of 26/08/2019, p. 112/200
108/124 may comprise a 356 hemostasis valve. Leaflet suture 344 may be inserted through valve 356. Valve 356 may be somewhat stiff. The needle handle 354 can include additional ports 358 to access the lumen of the internal flexible shaft 336. The handle of the needle 354 can be positioned proximally to the handle 350, so that the internal flexible shaft 336 extends through the handle 350, and to the lumen of the delivery shaft 334. The handle 350 may comprise a hemostasis valve for receiving the inner flexible shaft 336 and sealing the internal components of the handle, including the opening for the delivery shaft 334, from the environment. Needle 338 can be extendable and retractable by extending needle handle 354 to handle 350 or by retracting needle handle 354 from handle 350, respectively.
[233] Applying pressure to the leaflet, when needle tip 338 extends distally beyond flexible tube 332 and flexible sleeve 333, can cause needle tip 338 to pierce the leaflet so that needle tip 338 can extend to the opposite side (for example, the atrial side) of the leaflet, as shown in Figure 38C. This pressure can be exerted by extending the needle tip 338 and / or retracting the entire delivery device 330 in a proximal direction with the needle tip 338 in an extended position.
[234] Figures 38D to 38F represent the
Petition 870190083220, of 26/08/2019, p. 113/200
109/124 Positioning the leaflet anchor. The leaflet anchor may be a pledget 340 similar to that described in this document, elsewhere. Pledget 340 can be attached or attached to the distal end of a suture 344. The pledget can comprise a soft and / or flexible material, such as a fabric. Suture 344 can extend through the internal flexible axis 336. The pledget 340 can be folded or compressed in a configuration that comprises a reduced radial cross-section, so that it can be arranged inside the internal flexible axis 336 for delivery, as shown in Figures 38D and 40A. Pledget 340 can expand to assume a larger radial cross-section after positioning the distal end of needle tip 338, as shown in Figure 38E. In some embodiments, the pledget 340 can be pushed through the internal flexible axis 336, through a push wire or a release wire (not shown), similar to that illustrated in Figure 35E. After delivery, through the tip of the needle 338, the proximal retraction of the leaflet suture 344 can cause the leaflet anchor to assume a radially enlarged shape, axially collapsed, preventing the leaflet anchor from being retracted through the perforation in the and thus anchor the leaflet suture to the leaflet, as shown in Figure 38F.
[235] Figure 40C schematically represents a
Petition 870190083220, of 26/08/2019, p. 114/200
110/124 pledget 340 connected to the distal end of a leaflet suture 344. The pledget 340 can comprise two wings 341, 342, which can be rolled / folded (for example, both clockwise and counterclockwise) around longitudinal geometric axis of pledget 340, to form a reduced cross-sectional conformation. In some embodiments, leaflet suture 344 can be formed in an integrated manner with pledget 340, as described in this document, in another location (Figures 43A to 43C). In order to produce a collapsible or collapsible configuration, the proximal end of the suture 344 that extends from pledget 340 can be threaded backwards, through one or more openings (for example, two openings, three openings, four openings, etc.) formed in pledget 340, as shown in Figure 38E. In some embodiments, the openings can be aligned along a center of the pledget 340. The openings can extend through the pledget 340 and through the portion of the embedded portion of suture 344, which is part of the pledget 340. The embedded part of the Suture 344 can be, at least partially, flattened within pledget 340. In some embodiments, the openings can be placed substantially near the center of the pledget (for example, immediately to the left or right of the embedded suture 344 or alternately between the left side and the right side of the suture thread 344).
Petition 870190083220, of 26/08/2019, p. 115/200
111/124
When positioned, suture 344 can be effectively joined to a distal end of pledget 340 (for example, suture 344 can make a return loop to where it inserts between pledget sheets). Pledget 340 can be formed so that wings 341, 342 are approximately the same size or can be formed to be different sizes. After the proximal retraction of the leaflet suture 344, pledget 340 can be folded to assume an accordion-like shape, as shown in Figure 38F. The pledget 340 can assume a conformation that comprises a substantially flat surface that is approximately perpendicular to the longitudinal geometric axis of the suture of the leaflet 344. This conformation can facilitate the anchoring of the suture 344 in the leaflet. By anchoring the leaflet suture 344 in the leaflet, the leaflet anchor delivery subsystem 340 can be removed from the delivery catheter 100. The leaflet anchor delivery components can be retracted proximally along a proximal end of the suture 344 , which can remain extending through the delivery catheter 100 to the leaflet anchor 340, next to the ventricular anchor suture 311.
[236] The ventricular anchor suture 311 and the leaflet anchor suture 344 can be tightly coupled to form the neocord implant or join two sections of the neocord implant so that the neocord
Petition 870190083220, of 26/08/2019, p. 116/200
112/124 extend between the ventricular anchor 302 and the leaflet anchor 340. The total length of the neocords can be modulated so that an appropriate tension is applied to the leaflet, with the tension maintained by the ventricular anchor 302. The sutures 311, 344 may remain extending through delivery catheter 100 to an out-of-body location. In some embodiments, the proximal ends of suture 311, 344 can be fed into a handle or a proximal portion of a suture lock delivery system 370, during suture lock placement and suture cut 311, 344. In some modalities, the proximal ends
can remain free or attached or trapped by others
means.
[237] Figures 41A to 411 illustrate various views of the 370 suture lock delivery subsystem and its components. Figure 41A represents a perspective view of a distal end of subsystem 370. Figure 41B
represents a perspective view of a far end
proximal to subsystem 370. Figure 41C represents a partially exploded view of the distal end of subsystem 370. Figure 41D represents a perspective view of a distal end of a section assembly. Figures 41E and 41F represent side views of a sectional mounting part of subsystem 370. Figure 41G represents a view
side of a 37 6 suture lock and a far end
Petition 870190083220, of 26/08/2019, p. 117/200
113/124 distal from a torque driver 388 configured to engage with suture lock 376. Figures 41H and 411 represent a view of the proximal end and a view of the distal end, respectively, of suture lock 376.
[238] The suture lock delivery subsystem 370 can be configured to advance (for example, slide) a locking suture 376 through both sutures 311, 344 (or even additional sutures) by securing the same joints. Each of the sutures 311, 344 can be retracted proximally to tension the sutures 311, 344 and modulate the length of each suture 311, 344 between suture lock 376 and the respective tissue anchors 302, 340. Once the tension and the length of the neocord implant, suture lock 376 can be locked to fix the length of sutures 311, 344, so that sutures 311, 344 can no longer move, relative to suture lock 376. sutures 311, 344 can then be cut at a proximal point of suture lock 376. Suture 311, 344 can be cut by the same suture lock delivery subsystem 370 that delivered suture lock 376. In other embodiments, a separate cutting device can be inserted into the delivery catheter 100 after the suture lock has been locked in place.
[239] Figure 38G represents the advance of suture lock 376 through the suture of the ventricular anchor 311 and the
Petition 870190083220, of 26/08/2019, p. 118/200
114/124 suture of leaflet 344. The suture lock delivery subsystem 370 can be advanced through delivery catheter 100 and can push a suture lock 37 6 along the distal direction of sutures 311, 344, bringing the proximal portions together sutures 311, 344 at the distal end of suture lock 37 6. Suture lock 37 6 can be advanced along the sutures by a retainer catheter 373. The distal end of retainer catheter 373 can be coupled to a retainer 377 (Figure 41C). The retainer element may comprise a flange 371 or other mechanical feature configured to engage suture lock 376. For example, flange 371 can be inserted into a recess, at a proximal end of suture lock 376. In some embodiments, the rotation of the retention catheter 373 and / or the translation substantially perpendicular to the axial direction of the retention catheter 373 can be used to disengage the retainer catheter 373 from suture lock 376. Sutures 311, 344 can extend from respective tissue anchors to pass through suture lock 376, entering from a distal channel 395, on a distal side of suture lock 376, shown in Figure 411, and exiting on a proximal channel 394 on a proximal face of suture lock 376, shown in Figure 41H. Sutures 311, 344 can extend through a channel in a cutting head 375, proximal to the
Petition 870190083220, of 26/08/2019, p. 119/200
115/124 suture 376 and along the outside of retainer catheter 373, and through delivery catheter 100. Cutting head 375 can be attached to the distal end of a cutting catheter 372. Retaining catheter 373 can extend through an internal lumen of the cutter catheter 372, such that the two catheters 372, 373 can be extensible or retractable, in relation to each other.
[240] Once sutures 311, 344 are locked (fixedly attached) within the suture lock
376, the proximal ends of the suture 311, 344 can be cut adjacent to the proximal face of the suture lock. The sutures 311, 344 can be cut by advancing the cutting catheter 372 coupled to the cutting head 375, towards the proximal face of the suture lock 376. As shown schematically in Figures 41E to 41F, when the cutting head 375 advances to the along the retainer catheter 373, towards the retainer element 377, the cutting head approaches the sutures 311, 344 of the cutting blade 379 positioned on the retainer element 377. The cutting head 375 is configured to advance over the retainer element
377, so that the channel in the cutting head 375 that holds sutures 311, 344 is increasingly spatially occupied by blade 379. As blade 379 is forced into the channel of cutting head 375, blade 379 cuts sutures 311, 344. The application of tension
Petition 870190083220, of 26/08/2019, p. 120/200
116/124 proximal to sutures 311, 344 can facilitate the cutting of sutures 311, 344. In other embodiments, different actions (for example, the rotation of a cutting catheter) can be configured to cut sutures 311, 344. In some deployments, more than two sutures can be employed, and can be locked within suture lock 376 and separated by suture lock delivery subsystem 370 in the same way. In some embodiments, advancing cutting head 375 through retainer element 377 can facilitate disengagement of retaining catheter 373 from suture lock 376. For example, cutting head 375 can advance to a distal position, where it is configured to stabilize suture lock 376, allowing retainer catheter 373 to be axially and / or rotatively detached from suture lock 376.
[241] Figure 41G illustrates a side view of an example of a 376 suture lock (shown with its outer shell / sheath removed). The sutures can pass through suture lock 376 from a distal end to a proximal end, as described herein, in another location. Suture lock 376 may comprise a screw 382 configured to distally advance or proximally retract a push wedge 384, depending on the direction of rotation of the screw. Screw 382 can be rotated by a torque shaft 388. The
Petition 870190083220, of 26/08/2019, p. 121/200
117/124 torque 388 can comprise a driver head configured to correspond to recess 381 (for example, a polygonal recess or other non-circular recess, as shown in Figure 41H) positioned at the proximal end of suture lock 376, so that the rotation of the torque shaft 388 causes the rotation of the screw 382. The torque shaft 388 can extend through an internal lumen of the retaining catheter 373. The torque shaft 388 can be rotated at its proximal end by a button 398 or other actuation mechanism positioned at a proximal end of the handle of subsystem 396. Handle 396 may include a hemostasis valve 397. In some deployments, sutures 311, 344 may pass through hemostasis valve 397.
[242] The advance of the pushing wedge 384, through the torque axis 388, can cause a ramp or inclined surface 386 to gradually compress one or more springs, such as the spring pins 388. The compression of one or more springs 388 it can force a staple 390 downward on sutures 311, 344, compressing sutures 311, 344 between two opposite surfaces. In some embodiments, the clamp 390 and the opposite surface 392 may have toothed surfaces configured to fit together in discrete increments. Coupled notch surfaces can provide increased retention of sutures 311, 344 between surfaces
Petition 870190083220, of 26/08/2019, p. 122/200
118/124 opposite, so that they cannot be removed, proximally or distally, from suture lock 376. In some embodiments, the tightening can be reversible by turning the torque axis in the opposite direction.
[243] Once the suture lock is properly positioned over sutures 311, 344 and locked in place, sutures 311, 344 can be cut, as described in this document, elsewhere. Figure 38H represents the retraction of the suture lock delivery subsystem 370 after sutures 311, 344 have been cut. Once the suture lock delivery subsystem 370 has been removed from delivery catheter 100, delivery catheter 100 can be removed from the body.
[244] Figure 42 schematically illustrates a helical anchor 110 implanted in a portion of the ventricle comprising the relatively thick tissue between two of the papillary muscles. As described in this document, in another location, the implanted neocord construction, the optional neopapillary muscle and / or the helical anchor can be aligned along a substantially parallel or concentric longitudinal geometric axis with the original path of the native rope and / or the path of the surrounding native strings. In certain embodiments, the construction of the implanted neocord, the optional neopapillary muscle and / or the helical anchor aligned along a geometric axis
Petition 870190083220, of 26/08/2019, p. 123/200
119/124 longitudinal which is within 5 degrees, 10 degrees or 15 degrees of being parallel to the original path of the native rope and / or the path of the surrounding native rope.
[245] Figures 43A to 43C schematically represent an example of a pledget, as described in this document, elsewhere, in particular, with reference to Figures 38E and 38F. Figure 43A schematically illustrates a pledget 340 formed by attaching a distal end (shown in dashed lines) of suture 344 between two flat sheets, so that the sheets are for the left and right wings 341, 342. Figure 43B shows a cross section of pledget 340, along the geometric axis BB illustrated in Figure 43A. In some embodiments, suture 344 may be inserted between two sheets (for example, substantially in the middle of the sheets) and pressed and / or laminated to join the three components together (for example, under heat and / or pressure ). At least one of the layers can be partially sintered. Suture 344 can be flattened and / or densified to improve resistance to rupture of the suture. The sheets may be flat sheets of polytetrafluoroethylene (PTFE) (for example, thin sheets of uncured, expanded PTFE (ePTFE)) or any other suitable material. In some deployments, leaflet suture 344 may be arranged between sheets in alternative configurations, such as a
Petition 870190083220, of 26/08/2019, p. 124/200
120/124 zigzag or S-shaped configuration. Figure 43C shows pledget 340 of Figure 43A comprising a plurality of openings 343 through which the proximal end of suture 344 can be threaded through the
same. In some modalities, an or more openings 343 can be formed through of pledget, in many settings, to to form an structure collapsible,
as described in this document, elsewhere, which are configurable to anchor a 344 suture against the mitral leaflet. Figure 43C shows openings 343 that alternate around opposite sides of suture 344. In some embodiments, openings 343 can be formed on the same side of suture 344 (for example, wing wing 341 or wing 342). In some embodiments, the openings 343 can be formed through the suture 344. The openings 343 can be aligned along a center of the pledget 340. The openings
343 can be aligned along the length of the suture
344 (for example, they can form a straight line). Suture 344 can be at least partially flattened between the two opposing sheets, which can facilitate the placement of openings 343 through suture 344. Various combinations of openings 343, which include the positioning described above, can be used.
[246] Although this disclosure describes certain modalities and examples, many aspects of the systems and
Petition 870190083220, of 26/08/2019, p. 125/200
121/124 methods described above can be combined differently and / or modified to form further acceptable modalities or examples. All such changes and variations must be included in this document, within the scope of this disclosure. In fact, a wide variety of projects and approaches are possible, and are within the scope of this disclosure.
[247] Furthermore, while there may be some modalities within the scope of this disclosure that are not expressly mentioned above or elsewhere in this document, this disclosure contemplates and includes all modalities within the scope of what this disclosure shows and describes. In addition, this disclosure contemplates and includes modalities that comprise any combination of any structure, material, stage, or other resource revealed anywhere in this document, with any other structure, material, stage or other resource revealed anywhere in this document. .
[248] In addition, certain features that are described in this disclosure, in the context of separate deployments, can also be deployed in combination in a single deployment. On the other hand, several features described in the context of a single deployment can also be deployed in multiple deployments separately or in any suitable subcombination. Furthermore, although
Petition 870190083220, of 26/08/2019, p. 126/200
122/124 features can be described above as acting in certain combinations, one or more features of a claimed combination can, in some cases, be removed from the combination, and the combination can be claimed as a subcombination or variation of a subcombination.
[249] For the purpose of this disclosure, certain aspects, advantages and resources are described in this document. Not necessarily all of these aspects, advantages and resources can be achieved according to any particular modality. Those skilled in the art recognize that disclosure can be incorporated or carried out in a manner that achieves an advantage or group of advantages, as taught in this document, without necessarily achieving other advantages, as can be taught or suggested in this document.
[250] The disclosure, in this document, of any resource, aspect, method, property, characteristic, quality, attribute, particular element, or similar, in connection with various modalities, can be used in all other modalities presented in this document. . In addition, any methods described in this document can be practiced using any suitable device to perform the indicated steps.
[251] In addition, although components and operations can be represented in the drawings or described
Petition 870190083220, of 26/08/2019, p. 127/200
123/124 in the specification, in a particular arrangement or order, such components and operations need not be arranged and performed in the particular arrangement and order shown, either in sequential order, or include all components and operations, to achieve desirable results. Other components and operations that are not represented, or described, can be incorporated into the modalities and examples. For example, one or more additional operations can be performed before, after, simultaneously or between any of the described operations. In addition, operations can be redeployed or reordered in other deployments. In addition, the separation of various system components in the deployments described above should not be understood as requiring such separation in all deployments, and it should be understood that the components and systems described can generally be integrated into a single product or packaged in multiple products.
[252] In summary, several modalities and illustrative examples are described in this document. Although the systems and methods have been revealed in the context of these modalities and examples, this disclosure extends beyond the modalities specifically revealed to other alternative modalities and / or other uses of the modalities, as well as certain modifications and equivalents thereof. It is
Petition 870190083220, of 26/08/2019, p. 128/200
124/124 disclosure expressly contemplates that several resources and aspects of the revealed modalities can be combined, or substitute each other. Consequently, the scope of this disclosure should not be limited by the particular disclosed modalities described above, but should be determined only by a fair reading of the claims that follow, as well as by their total scope of equivalents.

权利要求:
Claims (70)
[1]
1. Method of implanting prophetic transvascular tendon cords characterized by the fact that it comprises the steps of:
advance a catheter to the left atrium, through the mitral valve, and to the left ventricle;
position a ventricular anchor from the catheter and into a wall of the left ventricle, leaving a ventricular suture attached to the ventricular anchor and extending proximally to the catheter;
advancing a leaflet anchor to a mitral valve leaflet from the ventricle to attach the mitral valve leaflet to a leaflet suture, the leaflet suture extending proximally to the catheter; and attaching the leaflet suture to the ventricular suture to limit a range of travel of the leaflet towards the left atrium.
[2]
2. Method, according to claim 1, characterized by the fact that the advance of a leaflet anchoring step comprises attaching the leaflet anchor to the leaflet within a range of about 3 mm to about 10 mm, from of a leaflet coaptive border.
[3]
3. Method, according to claim 1 or 2, characterized by the fact that the step of placing a ventricular anchor comprises fixing the anchor to the septum
Petition 870190060712, of 06/28/2019, p. 39/59
2/18 ventricular.
[4]
4. Method according to claims 1 to 3, characterized by the fact that the step of positioning a ventricular anchor comprises advancing an anchor trigger through the mitral valve, turning the trigger to secure the ventricular anchor, and retracting proximally to the anchor trigger to expose the ventricular suture carried by the ventricular anchor.
[5]
5. Method according to any one of the preceding claims, characterized by the fact that the fastening step comprises applying a suture lock to the ventricular suture and the leaflet suture.
[6]
6. Method according to any one of the preceding claims, characterized in that it further comprises applying tension to the leaflet suture prior to the clamping step, to improve the leaflet function.
[7]
Method according to claim 6, characterized in that it comprises applying sufficient tension to the leaflet suture to pull the leaflet path limit during a systole to approximately the level of the annular space.
[8]
8. Method according to any one of the preceding claims, characterized by the fact that the clamping step comprises engaging a knot to clamp the leaflet suture and the ventricular suture.
Petition 870190060712, of 06/28/2019, p. 40/59
3/18
[9]
9. Method according to claim 5, characterized by the fact that it additionally comprises the step of cutting the leaflet suture and the ventricular suture proximally to the node, leaving the leaflet suture and the ventricular suture to function as cords native.
[10]
10. Method according to claim 5, characterized by the fact that it additionally comprises the step of cutting the leaflet suture and the ventricular suture proximally to the suture lock, leaving the leaflet suture and the ventricular suture to work like native strings.
[11]
11. Method according to any one of the preceding claims, characterized by the fact that it further comprises identifying a mitral valve that is insufficient due to the constriction of the leaflet and the cutting of at least a portion of a native string from the mitral valve.
[12]
12. Method according to any of the preceding claims, characterized by the fact that it additionally comprises an initial step of identifying a patient, which includes at least three characteristics selected from the group consisting of:
the patient was diagnosed with degenerative or primary mitral regurgitation;
the patient was diagnosed with functional or secondary mitral regurgitation;
Petition 870190060712, of 06/28/2019, p. 41/59
4/18 the patient was diagnosed with myxomatous mitral regurgitation;
the patient was diagnosed with an accentuated leaflet, broken cords, or leaflet prolapse;
the patient has grade 1 or more mitral regurgitation;
the patient has an annular diameter from leaflet A2 to leaflet P2, at least 5 mm smaller than the sum of leaflet length P2 + A2;
the patient has an annular diameter of leaflet A2 to P2 of at least 10 mm; and the patient has an access vessel diameter of at least 2 mm.
[13]
13. Method according to claim 12, characterized by the fact that the patient additionally has at least one characteristic selected from the group consisting of:
the patient was evaluated by a cardiology team that includes at least one cardiac surgeon, and determined not to be an appropriate candidate for conventional open surgical correction;
the patient has predicted STS operative mortality (STS score) of 2 or more;
the patient was offered and refused open surgical correction;
the patient is between 18 and 90 years old;
Petition 870190060712, of 06/28/2019, p. 42/59
5/18 the patient will not accept blood transfusion;
the patient has had open chest surgery previously; and the patient has an ejection fraction of at least 10 percent.
[14]
14. Method according to any one of the preceding claims, characterized by the fact that the ventricular suture is attached to the ventricular anchor through a ventricular tension element.
[15]
15. Method according to claim 14 characterized by the fact that the ventricular tension element comprises ePTFE.
[16]
16. Method according to any one of the preceding claims, characterized in that the step of advancing a leaflet anchor comprises placing a needle guide in contact with the leaflet and advancing a needle from a needle guide and through the flyer.
[17]
17.
Method according to claim 16, characterized in that it further comprises diverting a distal portion of the needle guide through an angle of at least about
160 degrees to position a distal end of the needle guide against the ventricle side of the leaflet.
[18]
18. Method, according to the claim characterized by the fact that the needle guide comprises
Petition 870190060712, of 06/28/2019, p. 43/59
6/18 a notched tube, and the deviation of the needle guide is performed by proactively retracting a pull thread.
[19]
19. Method of increasing the coaptive area of the mitral valve leaflet during systole, characterized by the fact that it comprises the steps of:
advance a catheter to the first ventricle;
attach, with the catheter, at least one first ventricular tension element to a wall of the ventricle;
attach, with the catheter, at least one first leaflet tension element to a mitral valve leaflet;
retract proximally the leaflet tension element to move the leaflet path limit, during the systole, towards the ventricle, thereby increasing the coaptive area of the mitral valve leaflet during the systole; and securing the leaflet tension element to the ventricular tension element.
[20]
20. Method for increasing the coaptive area of the mitral valve leaflet, according to claim 19, characterized by the fact that the ventricular tension element comprises a neopapillary muscle that has a distal end facing the ventricular anchor and a proximal end approximately at the top of the native papillary muscle, where the clamping step comprises clamping the leaflet tension element to the tension element
Petition 870190060712, of 06/28/2019, p. 44/59
7/18 ventricular at the proximal end of the neopapillary muscle.
[21]
21. Method for increasing the coaptive area of the mitral valve leaflet, according to claim 19 or 20, characterized by the fact that the neopapillary muscle comprises an elongated atraumatic body.
[22]
22. Method of increasing the coaptive area of the mitral valve leaflet, according to claim 21, characterized by the fact that the neopapillary muscle comprises ePTFE.
[23]
23. Method of increasing the coaptive area of the mitral valve leaflet, according to claim 21, characterized in that the gripping of a leaflet tension element with the catheter comprises advancing a needle guide having an end distal through the mitral valve and into the left ventricle, and deflect the needle guide through an angle of at least 160 degrees to bring the distal end into contact with the leaflet during systole.
[24]
24. Method of increasing the coaptive area of the mitral valve leaflet according to claim 23, characterized in that it additionally comprises advancing a leaflet anchor positioning needle outside the distal end of the needle guide and through the leaflet, and position an anchor from the needle.
[25]
25. Method of increasing the coaptive area of a leaflet
Petition 870190060712, of 06/28/2019, p. 45/59
8/18 mitral valve, according to claim 24, characterized by the fact that the step of positioning an anchor comprises positioning an anchor from a first reduced cross section, inside the positioning needle, up to a second cross section enlarged to seat against the atrial side of the leaflet.
[26]
26. Method of increasing the coaptive area of the mitral valve leaflet, according to claim 24, characterized by the fact that the step of placing an anchor comprises placing a pledget.
[27]
27. Method of increasing the coaptive area of the mitral valve leaflet according to any one of claims 19 to 26, characterized in that the step of proximally retracting the leaflet tension element comprises positioning an opening in the left ventricle , at least the leaflet tension element extending through the opening, and retract the leaflet tension element proximally, the opening functioning as a fulcrum, so that the tension element pulls the leaflet in the direction of the ventricle.
[28]
28. Method of increasing the coaptive area of the mitral valve leaflet, according to claim 27, characterized by the fact that the fulcrum is a distal opening of the catheter, and the step of retracting proximally comprises retracting proximally the element of booklet tension
Petition 870190060712, of 06/28/2019, p. 46/59
9/18 through the catheter.
[29]
29. Method of increasing the coaptive area of the mitral valve leaflet, according to any one of claims 19 to 28, characterized in that it additionally comprises attaching a second leaflet tension element to the leaflet and the ventricular tension element.
[30]
30. Containing a mitral valve leaflet in an assembled site characterized by the fact that it comprises:
a neopapillary, elongated, flexible muscle that has a proximal end and a distal end;
an helical tissue anchor attached to the distal end of the neopapillary muscle;
an elongated, flexible neocord that extends proximally to the neopapillary muscle; and a leaflet anchor attached to a proximal end of the neocord;
wherein the leaflet anchor is expandable from a first reduced cross section to advance through the leaflet, to a second enlarged cross section to contact an atrial side of the leaflet.
[31]
31. Containment of a mitral valve leaflet in situ, according to claim 30, characterized by the fact that the neocord is fixed in a suture that extends distally through the neopapillary muscle, up to the helical tissue anchor.
Petition 870190060712, of 06/28/2019, p. 47/59
10/18
[32]
32. Containment of an in situ mitral valve leaflet, according to claim 30 or 31, characterized by the fact that the helical anchor comprises a laser-cut hypotube.
[33]
33. Mitral valve leaflet containment in place, according to any one of claims 30 to 32, characterized by the fact that the helical anchor comprises a rounded spiral wire.
[34]
34. Containment of a mitral valve leaflet in situ, according to claim 33, characterized by the fact that the helical anchor comprises two rounded spiral wires.
[35]
35. Mitral valve leaflet containment in situ, according to any of claims 30 to 32, characterized by the fact that the neocord is a suture that extends from a proximal end of the neopapillary muscle to the leaflet anchor .
[36]
36. Containment of a mitral valve leaflet in place, according to claim 35, characterized by the fact that the suture extends through the neopapillary muscle to the helical tissue anchor.
[37]
37. Containment of a mitral valve leaflet in situ, according to claim 35, characterized by the fact that the neocord comprises a first component, which extends proximally from the
Petition 870190060712, of 06/28/2019, p. 48/59
11/18 neopapillary muscle, and a second component extending distally from the leaflet anchor, and in which a proximal portion of the first component and a distal portion of the second component are joined together by means of a locking device.
[38]
38. Containment of a mitral valve leaflet in situ, according to claim 37, characterized by the fact that the locking device has a locked configuration and an unlocked configuration, and in which the locking device is configured to be advanced through of the first component and the second component, when in an unlocked configuration, and to securely tighten the first component and the second component, when in a locked configuration.
[39]
39. Mitral valve leaflet containment in situ, according to any of claims 30 to 32, characterized by the fact that the leaflet anchor comprises a pledget.
[40]
40. Containment of mitral valve leaflet on site, according to claim 39, characterized by the fact that the pledget is configured to collapse by pulling a suture coupled to the pledget, with the pledget taking the second cross-section enlarged when collapsing.
[41]
41. Containing mitral valve leaflet in situ
Petition 870190060712, of 06/28/2019, p. 49/59
12/18 assembled according to claim 39, characterized by the fact that a suture is threaded through at least two openings in the pledget.
[42]
42. Mitral valve leaflet containment in place, according to claim 41, characterized by the fact that the suture is threaded through at least three openings in the pledget, the openings being substantially collinear.
[43]
43. Containment of an in situ mitral valve leaflet according to any one of claims 30 to 32, characterized by the fact that the helical anchor comprises an axis configured to receive and hold, with friction, a suture.
[44]
44. Containing a mitral valve leaflet in situ, according to any one of claims 30 to 32, characterized by the fact that the helical anchor comprises a loop to secure the neopapillary muscle to the helical anchor.
[45]
45. Containing a mitral valve leaflet in situ, according to any of claims 30 to 32, characterized by the fact that the neopapillary muscle comprises a soft strip.
[46]
46. Containment of a mitral valve leaflet in situ, according to any one of claims 30 to 32, characterized by the fact that the leaflet anchor
Petition 870190060712, of 06/28/2019, p. 50/59
13/18 comprises a T marker bar and the T marker bar comprises a bar rotatably coupled to a suture, so that rotation of the bar extends the leaflet anchor from the first reduced cross section to the second enlarged cross section.
[47]
47. In-place mitral valve leaflet containment according to any of claims 30 to 32, characterized in that the leaflet anchor comprises an axis, the axis comprising a plurality of flexible radially extending spokes , and where the spokes are configured to bend in alignment along a longitudinal geometric axis, so that they are confined within a delivery needle and inclined to expand radially outward, when not confined, to enlarge the booklet anchor from the first reduced cross section to the second enlarged cross section.
[48]
48. Tendon neocord positioning system characterized by the fact that it comprises:
a catheter having a proximal end and a distal end;
a helical anchor inside the catheter, which has a trigger configured to rotate the helical anchor that extends proximally through the catheter; and a radially expandable leaflet anchor within the
Petition 870190060712, of 06/28/2019, p. 51/59
14/18 catheter that has a suture that extends proximally through the catheter.
[49]
49. Tendinous neocord positioning system according to claim 48, characterized by the fact that the radially expandable leaflet anchor comprises a pledget.
[50]
50. Tendinous neocord positioning system according to claim 49, characterized by the fact that the pledget is transformable from an elongated strip configuration to an axially shortened configuration, radially enlarged by means of proximal retraction of the suture.
[51]
51. Tendinous neocord positioning system, according to claim 48, characterized by the fact that the radially expandable leaflet anchor comprises the suture inserted between two sheets of material.
[52]
52. Positioning system for tendinous neocords, according to claim 48, characterized by the fact that the radially expandable leaflet anchor is transported within a deviable positioning tube transported within the catheter.
[53]
53. Tendinous neocord positioning system according to claim 52, characterized in that a distal deviation zone of the positioning tube is deviable through an angle of at least about 160 degrees in response to the manipulation of a bypass control
Petition 870190060712, of 06/28/2019, p. 52/59
Proximal 15/18.
[54]
54. Tendon neocord positioning system according to claim 53, characterized in that the distal deviation zone is within about 1.5 cm from a distal end of the positioning tube.
[55]
55. Tendon neocord positioning system according to claim 53, characterized by the fact that the distal deviation zone is deviable to form a curve that has a better fit radius of no more than about 1.5 cm.
[56]
56. Tendon neocord positioning system according to claim 53, characterized by the fact that the deviable positioning tube comprises a notched deviation tube.
[57]
57. Tendon neocord positioning system according to claim 48, characterized by the fact that it is configured to position the helical anchor in a distal direction, and configured to position the radially expandable anchor in a proximal direction.
[58]
58. Tendon neocord positioning system, according to claim 48, characterized by the fact that the expandable leaflet anchor can be inserted in sequence in the catheter, after the helical anchor, and the driver has been removed from the catheter.
[59]
59. Neocord tendon positioning system,
Petition 870190060712, of 06/28/2019, p. 53/59
16/18 according to claim 48, characterized by the fact that the expandable leaflet anchor and the helical anchor and the actuator can be preloaded inside the catheter.
[60]
60. Leaflet anchor delivery system characterized by the fact that it comprises:
a delivery rod having a distal portion, a proximal portion and having a deviation zone positioned on a distal portion of the delivery rod;
a tissue piercing element configured to be advanced through the distal end of the delivery rod;
where the deviation zone is configured to position the distal end of the delivery rod on the ventricular side of the leaflet, with the proximal portion of the delivery rod extending to the left atrium.
[61]
61. Leaflet anchor delivery system according to claim 60, characterized by the fact that the diversion zone comprises a flexible tube.
[62]
62. Leaflet anchor delivery system according to claim 61, characterized in that the flexible tube, when deflected, can have a better radius of curvature of less than about 2 cm.
[63]
63. Pledget to anchor in a cardiac leaflet, the pledget being characterized by the fact that it comprises:
two flat sheets that comprise areas that
Petition 870190060712, of 06/28/2019, p. 54/59
17/18 substantially overlap;
a suture positioned between the two flat sheets, the suture having a proximal end and a distal end, where the proximal end extends on the first side of the two flat sheets; and one or more openings extending through the two flat sheets, which are sized to receive the suture;
wherein the two flat sheets are joined together through portions of overlapping areas on both sides of the suture.
[64]
64. Pledget according to claim 63, characterized by the fact that the suture is at least partially flat between the two sheets.
65. Pledget, in wake up with the claim 64, characterized by fact that an or more openings if extend through the flattened suture.66. Pledget, in wake up with Any of them of
claims 63 to 65, characterized by the fact that the distal end of the suture extends to a second side of the two flat sheets, the second side being opposite the first side.
[65]
67. Pledget according to any one of claims 63 to 66, characterized in that the suture extends between the two flat sheets along
Petition 870190060712, of 06/28/2019, p. 55/59
18/18 a substantially straight line.
[66]
68. Pledget according to any one of claims 63 to 66, characterized in that the suture extends between the two flattened sheets along a zigzag or undulating direction.
[67]
69. Pledget according to any one of claims 63 to 68, characterized in that the two flat sheets comprise expanded polytetrafluoroethylene.
[68]
70. Pledget according to any one of claims 63 to 69, characterized in that at least one of the two flat sheets is at least partially sintered.
[69]
71. Pledget according to any one of claims 63 to 70, characterized in that a proximal end of the suture extending from one side of the two flat sheets is threaded through one or more openings.
[70]
72. Pledget according to claim 71, characterized by the fact that the pledget comprises a collapsed configuration in which the two flat sheets are folded at least once to form a radially enlarged cross section extending around the suture, as it passes through one or more openings.

类似技术:

---

公开号 | 公开日 | 专利标题

---

BR112019013553A2|2020-01-07|METHOD AND APPARATUS FOR TRANSVASCULAR IMPLANTATION OF TENDINE NEOCORDES

---

US10925731B2|2021-02-23|Method and apparatus for transvascular implantation of neo chordae tendinae

---

US20210022858A1|2021-01-28|Method and apparatus for repairing a heart valve

---

US9592122B2|2017-03-14|Annuloplasty ring with intra-ring anchoring

---

US9474606B2|2016-10-25|Over-wire implant contraction methods

---

US9277994B2|2016-03-08|Implantation of repair chords in the heart

---

US8252050B2|2012-08-28|Implantation of repair chords in the heart

---

US8940042B2|2015-01-27|Apparatus for guide-wire based advancement of a rotation assembly

---

EP3441045B1|2020-07-29|Apparatus to draw first and second portions of tissue toward each other

---

JP2021517485A|2021-07-26|Methods and devices for mitral valve chordae tendineae repair

---

JP2020127779A|2020-08-27|Systems and methods for anchoring implant

同族专利:

---

公开号 | 公开日

---

US9877833B1|2018-01-30|

---

KR20190104045A|2019-09-05|

---

RU2019121972A3|2021-10-18|

---

US10667910B2|2020-06-02|

---

CA3048893A1|2018-07-05|

---

JP2020503165A|2020-01-30|

---

EP3562410A1|2019-11-06|

---

US20180185150A1|2018-07-05|

---

US10675150B2|2020-06-09|

---

RU2019121972A|2021-02-01|

---

US20200345496A1|2020-11-05|

---

US10682230B2|2020-06-16|

---

EP3562410A4|2020-08-12|

---

AU2017388857A1|2019-08-08|

---

CN110325125A|2019-10-11|

---

WO2018126188A1|2018-07-05|

---

US20180185151A1|2018-07-05|

---

US20180185152A1|2018-07-05|

引用文献:

---

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

---

---

US5329923A|1991-02-15|1994-07-19|Lundquist Ingemar H|Torquable catheter|

---

US6458107B1|1993-08-13|2002-10-01|Daig Corporation|Steerable coronary sinus catheter|

---

ES2335252T3|1997-06-27|2010-03-23|The Trustees Of Columbia University In The City Of New York|APPARATUS FOR THE REPAIR OF VALVES OF THE CIRCULATORY SYSTEM.|

---

US20030105519A1|1997-09-04|2003-06-05|Roland Fasol|Artificial chordae replacement|

---

FR2768324B1|1997-09-12|1999-12-10|Jacques Seguin|SURGICAL INSTRUMENT FOR PERCUTANEOUSLY FIXING TWO AREAS OF SOFT TISSUE, NORMALLY MUTUALLY REMOTE, TO ONE ANOTHER|

---

US6752813B2|1999-04-09|2004-06-22|Evalve, Inc.|Methods and devices for capturing and fixing leaflets in valve repair|

---

US7604646B2|1999-04-09|2009-10-20|Evalve, Inc.|Locking mechanisms for fixation devices and methods of engaging tissue|

---

US7563267B2|1999-04-09|2009-07-21|Evalve, Inc.|Fixation device and methods for engaging tissue|

---

EP2078498B1|1999-04-09|2010-12-22|Evalve, Inc.|Apparatus for cardiac valve repair|

---

US6626930B1|1999-10-21|2003-09-30|Edwards Lifesciences Corporation|Minimally invasive mitral valve repair method and apparatus|

---

US6743239B1|2000-05-25|2004-06-01|St. Jude Medical, Inc.|Devices with a bendable tip for medical procedures|

---

US6840246B2|2000-06-20|2005-01-11|University Of Maryland, Baltimore|Apparatuses and methods for performing minimally invasive diagnostic and surgical procedures inside of a beating heart|

---

US20050177180A1|2001-11-28|2005-08-11|Aptus Endosystems, Inc.|Devices, systems, and methods for supporting tissue and/or structures within a hollow body organ|

---

US8075570B2|2001-11-28|2011-12-13|Aptus Endosystems, Inc.|Intraluminal prosthesis attachment systems and methods|

---

US6978176B2|2001-12-08|2005-12-20|Lattouf Omar M|Treatment for patient with congestive heart failure|

---

US20030120341A1|2001-12-21|2003-06-26|Hani Shennib|Devices and methods of repairing cardiac valves|

---

US7048754B2|2002-03-01|2006-05-23|Evalve, Inc.|Suture fasteners and methods of use|

---

US6969098B2|2002-07-03|2005-11-29|Illinois Tool Works Inc.|Non-elevating handle for center lift carrier|

---

US7083628B2|2002-09-03|2006-08-01|Edwards Lifesciences Corporation|Single catheter mitral valve repair device and method for use|

---

CN101184455A|2005-03-25|2008-05-21|安普尔医药公司|Devices, systems, and methods for reshaping a heart valve annulus|

---

AU2006203909A1|2003-11-20|2006-07-13|Arthrosurface, Inc.|System and method for retrograde procedure|

---

US7763063B2|2003-09-03|2010-07-27|Bolton Medical, Inc.|Self-aligning stent graft delivery system, kit, and method|

---

WO2005027754A1|2003-09-15|2005-03-31|Abbott Laboratories|Suture locking device and methods|

---

US20080228265A1|2007-03-13|2008-09-18|Mitralign, Inc.|Tissue anchors, systems and methods, and devices|

---

US7637903B2|2004-02-09|2009-12-29|Cryocor, Inc.|Catheter articulation segment with alternating cuts|

---

US7390329B2|2004-05-07|2008-06-24|Usgi Medical, Inc.|Methods for grasping and cinching tissue anchors|

---

KR100634376B1|2004-07-07|2006-10-16|삼성전자주식회사|Apparatus drying substrates|

---

AU2006206591B2|2005-01-21|2011-08-25|Mayo Foundation For Medical Education And Research|Thorascopic heart valve repair method and apparatus|

---

US20110060407A1|2005-02-07|2011-03-10|Ted Ketai|Methods, systems and devices for cardiac valve repair|

---

US8394113B2|2005-05-20|2013-03-12|Neotract, Inc.|Coiled anchor device|

---

US8685083B2|2005-06-27|2014-04-01|Edwards Lifesciences Corporation|Apparatus, system, and method for treatment of posterior leaflet prolapse|

---

US8951285B2|2005-07-05|2015-02-10|Mitralign, Inc.|Tissue anchor, anchoring system and methods of using the same|

---

US20070118151A1|2005-11-21|2007-05-24|The Brigham And Women's Hospital, Inc.|Percutaneous cardiac valve repair with adjustable artificial chordae|

---

US7632308B2|2005-11-23|2009-12-15|Didier Loulmet|Methods, devices, and kits for treating mitral valve prolapse|

---

DE102005062657A1|2005-12-28|2007-07-12|Osypka, Peter, Dr.-Ing.|Device for closing an opening located in a heart separation wall|

---

US7635386B1|2006-03-07|2009-12-22|University Of Maryland, Baltimore|Methods and devices for performing cardiac valve repair|

---

US7431692B2|2006-03-09|2008-10-07|Edwards Lifesciences Corporation|Apparatus, system, and method for applying and adjusting a tensioning element to a hollow body organ|

---

US20070219565A1|2006-03-17|2007-09-20|Vahid Saadat|Kinetic anchoring deployment system|

---

US20080004485A1|2006-06-30|2008-01-03|Moreschi Rafael M|Trans-Septal Heart Assist Devices and Methods of Use|

---

EP2046227A2|2006-08-03|2009-04-15|Hansen Medical, Inc.|Systems for performing minimally invasive procedures|

---

WO2008028102A2|2006-09-01|2008-03-06|St. Jude Medical, Cardiology Division, Inc.|System for arterial access|

---

WO2008045877A2|2006-10-10|2008-04-17|St. Jude Medical, Atrial Fibrillation Division, Inc.|Electrode tip and ablation system|

---

EP3345572A1|2007-02-14|2018-07-11|Edwards Lifesciences Corporation|Suture and method for repairing heart|

---

US20190240023A1|2007-03-13|2019-08-08|Edwards Lifesciences Corporation|Tissue anchors, systems and methods, and devices|

---

US8303622B2|2007-03-14|2012-11-06|St. Jude Medical, Inc.|Heart valve chordae replacement methods and apparatus|

---

US8480730B2|2007-05-14|2013-07-09|Cardiosolutions, Inc.|Solid construct mitral spacer|

---

US7914515B2|2007-07-18|2011-03-29|St. Jude Medical, Atrial Fibrillation Division, Inc.|Catheter and introducer catheter having torque transfer layer and method of manufacture|

---

US20090069847A1|2007-08-17|2009-03-12|Wilson-Cook Medical Inc.|Suture lock|

---

US20090088837A1|2007-09-28|2009-04-02|The Cleveland Clinic Foundation|Prosthetic chordae assembly and method of use|

---

US8728097B1|2008-02-26|2014-05-20|Mitralign, Inc.|Tissue plication devices and methods for their use|

---

US9131939B1|2008-02-27|2015-09-15|Mitralign, Inc.|Device for percutaneously delivering a cardiac implant through the application of direct actuation forces external to the body|

---

US20090287304A1|2008-05-13|2009-11-19|Kardium Inc.|Medical Device for Constricting Tissue or a Bodily Orifice, for example a mitral valve|

---

US20100023118A1|2008-07-24|2010-01-28|Edwards Lifesciences Corporation|Method and apparatus for repairing or replacing chordae tendinae|

---

US8778016B2|2008-08-14|2014-07-15|Edwards Lifesciences Corporation|Method and apparatus for repairing or replacing chordae tendinae|

---

US8945211B2|2008-09-12|2015-02-03|Mitralign, Inc.|Tissue plication device and method for its use|

---

US8147542B2|2008-12-22|2012-04-03|Valtech Cardio, Ltd.|Adjustable repair chords and spool mechanism therefor|

---

US8808368B2|2008-12-22|2014-08-19|Valtech Cardio, Ltd.|Implantation of repair chords in the heart|

---

US8911494B2|2009-05-04|2014-12-16|Valtech Cardio, Ltd.|Deployment techniques for annuloplasty ring|

---

US9968452B2|2009-05-04|2018-05-15|Valtech Cardio, Ltd.|Annuloplasty ring delivery cathethers|

---

US20110011917A1|2008-12-31|2011-01-20|Hansen Medical, Inc.|Methods, devices, and kits for treating valve prolapse|

---

US9326843B2|2009-01-16|2016-05-03|Claret Medical, Inc.|Intravascular blood filters and methods of use|

---

EP3300691B1|2009-09-21|2021-06-30|Boston Scientific Scimed, Inc.|Intravascular blood filters|

---

US20170202657A1|2009-01-16|2017-07-20|Claret Medical, Inc.|Intravascular blood filters and methods of use|

---

US8828053B2|2009-07-24|2014-09-09|Depuy Mitek, Llc|Methods and devices for repairing and anchoring damaged tissue|

---

US9011520B2|2009-10-29|2015-04-21|Valtech Cardio, Ltd.|Tissue anchor for annuloplasty device|

---

US9180007B2|2009-10-29|2015-11-10|Valtech Cardio, Ltd.|Apparatus and method for guide-wire based advancement of an adjustable implant|

---

US8940042B2|2009-10-29|2015-01-27|Valtech Cardio, Ltd.|Apparatus for guide-wire based advancement of a rotation assembly|

---

US9307980B2|2010-01-22|2016-04-12|4Tech Inc.|Tricuspid valve repair using tension|

---

US9277915B2|2010-06-26|2016-03-08|Vasostitch, Inc.|Method and apparatus for transapical access and closure|

---

US10076327B2|2010-09-14|2018-09-18|Evalve, Inc.|Flexible actuator mandrel for tissue apposition systems|

---

US9782168B2|2010-09-20|2017-10-10|Entourage Medical Technologies, Inc.|System for providing surgical access|

---

WO2012040865A1|2010-10-01|2012-04-05|Alberto Weber|Medical apparatus and method for heart valve repair|

---

US8920518B2|2010-10-15|2014-12-30|Evolution Industries, Inc.|Socket system including a vacuum liner for prosthetic or orthotic devices and associated methods|

---

US8968335B2|2010-10-27|2015-03-03|Mitralign, Inc.|Hand operated device for controlled deployment of a tissue anchor and method of using the same|

---

US9259306B2|2010-12-30|2016-02-16|Claret Medical, Inc.|Aortic embolic protection device|

---

CA2830828A1|2011-04-04|2012-10-11|The Medical Research, Infrastructure, And Health Services Fund Of The Tel Aviv Medical Center|Device and method for heart valve repair|

---

CN103813757A|2011-06-01|2014-05-21|尼奥绰德有限公司|Minimally Invasive Repair of heart valve leaflets|

---

WO2013003228A1|2011-06-27|2013-01-03|University Of Maryland, Baltimore|Transapical mitral valve repair device|

---

US8926588B2|2011-07-05|2015-01-06|Medtronic Vascular, Inc.|Steerable delivery catheter|

---

US9198649B2|2012-01-27|2015-12-01|Arthrocare Corporation|Rotating locking member suture anchor and method for soft tissue repair|

---

US8961594B2|2012-05-31|2015-02-24|4Tech Inc.|Heart valve repair system|

---

CA2885354A1|2012-09-29|2014-04-03|Mitralign, Inc.|Plication lock delivery system and method of use thereof|

---

US20140142689A1|2012-11-21|2014-05-22|Didier De Canniere|Device and method of treating heart valve malfunction|

---

WO2014093861A1|2012-12-14|2014-06-19|Mayo Foundation For Medical Education And Research|Mitral valve repair devices|

---

WO2014108903A1|2013-01-09|2014-07-17|4Tech Inc.|Soft tissue anchors|

---

EP2968847A4|2013-03-15|2016-11-30|Mitralign Inc|Translation catheters, systems, and methods of use thereof|

---

WO2015047552A1|2013-09-24|2015-04-02|Stavrianoudakis Jim Steve|Method and apparatus for locking assemblies|

---

US20170156861A1|2013-10-23|2017-06-08|Lc Therapeutics, Inc.|Percutaneous or Minimally Invasive Cardiac Valve Repair System and Methods of Using the Same|

---

JP6574421B2|2013-12-10|2019-09-11|セント・ジュード・メディカル・エイトリアル・フィブリレーション・ディヴィジョン・インコーポレーテッド|Catheter curve shape strut|

---

US10426515B2|2013-12-26|2019-10-01|The Regents Of The University Of California|Transseptal access device and methods|

---

US9681864B1|2014-01-03|2017-06-20|Harpoon Medical, Inc.|Method and apparatus for transapical procedures on a mitral valve|

---

EP3104812B1|2014-02-14|2020-05-13|Edwards Lifesciences Corporation|Percutaneous leaflet augmentation|

---

US20150250590A1|2014-03-10|2015-09-10|St. Jude Medical, Cardiology Division, Inc.|Transapical mitral chordae replacement|

---

WO2015184452A1|2014-05-30|2015-12-03|Rechord Medical Solutions Llc|Mitral and ventricular geometry restoration systems and methods|

---

EP3154475B1|2014-06-12|2018-05-02|The Cleveland Clinic Foundation|Device and system for treating a regurgitant heart valve|

---

US9801720B2|2014-06-19|2017-10-31|4Tech Inc.|Cardiac tissue cinching|

---

CN106999174B|2014-07-17|2019-08-23|核心医疗股份公司|Medical Devices and method for heart valve reparation|

---

GB2536538B|2014-09-17|2018-07-18|Cardiomech As|Anchor for implantation in body tissue|

---

EP3922213A4|2014-10-14|2021-12-15|Valtech Cardio Ltd|Leaflet-restraining techniques|

---

US20160228117A1|2014-12-15|2016-08-11|Peter Scott Borden|Suture lock|

---

US20160256269A1|2015-03-05|2016-09-08|Mitralign, Inc.|Devices for treating paravalvular leakage and methods use thereof|

---

US10799357B2|2015-10-21|2020-10-13|Coremedic Ag|Medical instrument and method for heart valve repair|

---

CN112618108A|2015-10-21|2021-04-09|核心医疗股份公司|Medical implant and method for heart valve repair|

---

JP6798753B2|2015-10-21|2020-12-09|コアメディック アーゲーＣｏｒｅｍｅｄｉｃ Ａｇ|Medical devices and methods for heart valve repair|

---

WO2017079153A1|2015-11-02|2017-05-11|University Of Maryland, Baltimore|Distal anchor apparatus and methods for mitral valve repair|

---

EP3397209A4|2015-12-30|2019-11-27|Pipeline Medical Technologies, Inc.|Mitral leaflet tethering|

---

US10624743B2|2016-04-22|2020-04-21|Edwards Lifesciences Corporation|Beating-heart mitral valve chordae replacement|

---

US20170340443A1|2016-05-24|2017-11-30|Edwards Lifesciences Corporation|Posterior mitral valve leaflet approximation|

---

CN113288514A|2016-12-16|2021-08-24|爱德华兹生命科学公司|Deployment systems, tools, and methods for delivering anchoring devices for prosthetic valves|

---

US10925731B2|2016-12-30|2021-02-23|Pipeline Medical Technologies, Inc.|Method and apparatus for transvascular implantation of neo chordae tendinae|

---

US9877833B1|2016-12-30|2018-01-30|Pipeline Medical Technologies, Inc.|Method and apparatus for transvascular implantation of neo chordae tendinae|

---

US11083580B2|2016-12-30|2021-08-10|Pipeline Medical Technologies, Inc.|Method of securing a leaflet anchor to a mitral valve leaflet|

---

US10743991B2|2017-01-23|2020-08-18|Edwards Lifesciences Corporation|Chordae tendineae adjustment|

---

US11123187B2|2017-04-05|2021-09-21|Opus Medical Therapies, LLC|Transcatheter atrial anchors and methods of implantation|

---

US10765515B2|2017-04-06|2020-09-08|University Of Maryland, Baltimore|Distal anchor apparatus and methods for mitral valve repair|

---

CN110944600A|2017-06-19|2020-03-31|哈珀恩医疗有限公司|Method and apparatus for cardiac surgery|

---

EP3764919A4|2018-03-12|2022-01-19|Pipeline Medical Tech Inc|Method and apparatus for mitral valve chord repair|

---

US20190314155A1|2018-04-12|2019-10-17|Edwards Lifesciences Corporation|Mitral valve spacer device|

---

US20190365539A1|2018-05-29|2019-12-05|Edwards Lifesciences Corporation|Reverse ventricular remodeling and papillary muscle approximation|

---

US20190380835A1|2018-06-05|2019-12-19|Edwards Lifesciences Corporation|Valve repair devices and procedures|

---

US11224418B2|2018-06-15|2022-01-18|Edwards Lifesciences Corporation|Papillary muscle approximation pads|GB2536538B|2014-09-17|2018-07-18|Cardiomech As|Anchor for implantation in body tissue|

---

US10925731B2|2016-12-30|2021-02-23|Pipeline Medical Technologies, Inc.|Method and apparatus for transvascular implantation of neo chordae tendinae|

---

AU2019397490A1|2018-12-12|2021-07-29|Pipeline Medical Technologies, Inc.|Method and apparatus for mitral valve chord repair|

---

US11083580B2|2016-12-30|2021-08-10|Pipeline Medical Technologies, Inc.|Method of securing a leaflet anchor to a mitral valve leaflet|

---

US9877833B1|2016-12-30|2018-01-30|Pipeline Medical Technologies, Inc.|Method and apparatus for transvascular implantation of neo chordae tendinae|

---

US10058428B1|2017-03-28|2018-08-28|Cardiac Success Ltd.|Method of repositioning papillary muscles to improve cardiac function|

---

WO2019081985A2|2017-10-23|2019-05-02|Cardiac Success Ltd.|Adjustable self-locking papillary muscle band|

---

EP3764919A4|2018-03-12|2022-01-19|Pipeline Medical Tech Inc|Method and apparatus for mitral valve chord repair|

---

US11253360B2|2018-05-09|2022-02-22|Neochord, Inc.|Low profile tissue anchor for minimally invasive heart valve repair|

---

WO2019217638A1|2018-05-09|2019-11-14|Neochord, Inc.|Systems and methods for transcatheter heart valve repair|

---

US11173030B2|2018-05-09|2021-11-16|Neochord, Inc.|Suture length adjustment for minimally invasive heart valve repair|

---

EP3796876A1|2018-05-22|2021-03-31|Boston Scientific Scimed, Inc.|Percutaneous papillary muscle relocation|

---

US10470797B1|2018-07-17|2019-11-12|SlipStream, LLC|Systems and methods for vascular access|

---

US10595994B1|2018-09-20|2020-03-24|Vdyne, Llc|Side-delivered transcatheter heart valve replacement|

---

US11071627B2|2018-10-18|2021-07-27|Vdyne, Inc.|Orthogonally delivered transcatheter heart valve frame for valve in valve prosthesis|

---

US11109969B2|2018-10-22|2021-09-07|Vdyne, Inc.|Guidewire delivery of transcatheter heart valve|

---

WO2020109582A1|2018-11-29|2020-06-04|Cardiomech As|Device for heart repair|

---

US20200188114A1|2018-12-12|2020-06-18|W. L. Gore & Associates, Inc.|Implantable component with socket|

---

US11253359B2|2018-12-20|2022-02-22|Vdyne, Inc.|Proximal tab for side-delivered transcatheter heart valves and methods of delivery|

---

CN109498216A|2018-12-25|2019-03-22|乐普（北京）医疗器械股份有限公司|A kind of drag wire locking catheters for valve reparation|

---

US11185409B2|2019-01-26|2021-11-30|Vdyne, Inc.|Collapsible inner flow control component for side-delivered transcatheter heart valve prosthesis|

---

US11076956B2|2019-03-14|2021-08-03|Vdyne, Inc.|Proximal, distal, and anterior anchoring tabs for side-delivered transcatheter mitral valve prosthesis|

---

US11173027B2|2019-03-14|2021-11-16|Vdyne, Inc.|Side-deliverable transcatheter prosthetic valves and methods for delivering and anchoring the same|

---

EP3955855A1|2019-04-16|2022-02-23|NeoChord, Inc.|Transverse helical cardiac anchor for minimally invasive heart valve repair|

---

AU2020267390A1|2019-05-04|2021-11-11|Vdyne, Inc.|Cinch device and method for deployment of a side-delivered prosthetic heart valve in a native annulus|

---

AU2020268426A1|2019-05-09|2021-12-09|W.L. Gore & Associates, Inc.|Continuous tethered tissue anchor and associated systems and methods|

---

WO2021035032A1|2019-08-20|2021-02-25|Vdyne, Inc.|Delivery and retrieval devices and methods for side-deliverable transcatheter prosthetic valves|

---

WO2021041639A1|2019-08-28|2021-03-04|Boston Scientific Scimed, Inc.|Method and device for mitral repair including papillary muscle relocation|

---

WO2021138339A1|2019-12-31|2021-07-08|Creative Heart Valve Solutions Llc|Methods, implants, and systems for treatment of mitral valve prolapse|

---

WO2021135270A1|2019-12-31|2021-07-08|杭州德晋医疗科技有限公司|Integrated anchor and anchoring system|

---

WO2021146757A2|2020-01-16|2021-07-22|Neochord, Inc.|Helical cardiac anchors for minimally invasive heart valve repair|

---

US11234813B2|2020-01-17|2022-02-01|Vdyne, Inc.|Ventricular stability elements for side-deliverable prosthetic heart valves and methods of delivery|

法律状态:
2021-10-13| B350| Update of information on the portal [chapter 15.35 patent gazette]|

---

2022-03-03| B06W| Patent application suspended after preliminary examination (for patents with searches from other patent authorities) chapter 6.23 patent gazette]|

优先权:

---

申请号 | 申请日 | 专利标题

---

US201662441031P| true| 2016-12-30|2016-12-30|

---

US62/441,031|2016-12-30|

---

US15/638,176|2017-06-29|

---

US15/638,176|US9877833B1|2016-12-30|2017-06-29|Method and apparatus for transvascular implantation of neo chordae tendinae|

---

PCT/US2017/069046|WO2018126188A1|2016-12-30|2017-12-29|Method and apparatus for transvascular implantation of neo chordae tendinae|

---