• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a tool holder (1) for a surgical tool such as a cutter for milling the acetabular cavity of a patient. The tool holder (1) comprises a locking slider (9) slidably disposed on a longitudinal drive shaft (6) movably between a locking position, in which locking means (10) carried by the locking slide (9) cooperate with a connecting plate (7) for retaining said surgical tool on the connection plate (7), and a release position, in which said surgical tool can be separated from the connecting plate (7). ). The tool holder (1) is arranged such that it does not require elastic return means of the locking slide (9) in the locking position. It can be sterilized without disassembly of the slide is necessary.
    公开号:CH710378A2
    申请号:CH01611/15
    申请日:2015-11-06
    公开日:2016-05-13
    发明作者:Gradel Thomas
    申请人:Deuxventorio Sàrl；
    IPC主号:
    专利说明:

    The present invention relates to a tool holder for surgical tool, in particular for a cutter for milling the acetabular cavity of a patient.
    An example of a tool holder known for such a cutter is described in EP 0 704 191, EP 1 129 667 and EP 1 624 814. This tool holder bayonet-type connection plate having notches substantially L-shaped, is very complex and expensive to manufacture because of the large number of parts it has. The presence of the return spring constantly reminding locking lugs in the locking position also makes this tool holder very complex to sterilize satisfactorily. A spring has indeed tend to retain and compact polluted particles between its turns and on its supports. Good sterilization thus requires at least partial disassembly of the tool holder, making it possible to fully extract the return spring, which takes a long time and involves a risk of loss of parts, which can render the tool holder unusable.
    US 2012/023 733 discloses another known tool holder for a milling cutter for milling the acetabular cavity of a patient. Again, a return spring recalls permanently a locking slide in the locking position.
    US 4,023,572 discloses a tool holder having a locking slider, the holding in a given axial position on the longitudinal drive shaft is provided by reversible latching holding means comprising a ball continuously pushed by a coil spring. This coil spring also has the disadvantage of a potential accumulation of polluted particles between its turns and on its supports.
    The problem proposed by the invention is to design a tool holder for a surgical tool, such as a cutter for milling the acetabular cavity of a patient, which is simple, easily sterilizable or inexpensive enough to be discarded after a single use.
    To achieve these objects as well as others, the invention provides a tool holder for a surgical tool such as a cutter for milling the acetabular cavity of a patient, the tool holder comprising:a longitudinal drive shaft comprising a first end with a connection plate shaped to removably receive said surgical tool and to rotate it about the longitudinal direction,a locking slide, slidably disposed on the longitudinal drive shaft being movable between a locking position, in which locking means carried by the locking slide cooperate with the connection plate to retain said surgical tool on the connecting plate, and a release position, wherein said surgical tool can be separated from the connection board; in which:the tool holder is devoid of elastic return means of the locking slide in the locking position,reversible latching retaining means for holding the locking slide in the locking position, according to the invention, the reversible latching holding means comprise:an elastically expandable operating ring radially and forming part of the locking slide,a nevure carried by one of the operating ring or the longitudinal drive shaft, and a groove on the other of the operating ring or the longitudinal drive shaft, the rib and the groove being shaped to engage one into the other in a locking position.
    A firm hold of the locking slide in the locking position is thus ensured, without this requiring the presence of a return spring. The number of constituent elements of the tool holder is thus considerably reduced, and its assembly is simplified. In case of re-sterilization for reuse, it is not necessary to disassemble the slide, given the absence of return spring.
    The snap-fastening means with elastically expandable and interference-shaped snap ring with the longitudinal drive shaft by means of the rib and the groove are simple, inexpensive to manufacture and very easy to use. No helical spring is used to push or hold the operating ring in the locked position.
    [0009] Advantageously, it can be provided that:the connection plate is a bayonet type connection plate having notches substantially L-shaped adapted to receive said surgical tool,the locking means comprise longitudinal locking fingers carried by the locking slide,in the locking position, the longitudinal locking fingers penetrate substantially L-shaped notches to retain said surgical tool,in the release position, the longitudinal locking fingers are at least partially removed from the substantially L-shaped notches.
    The assembly of the surgical tool is thus done in a simple and intuitive way on the connection plate, by a translational movement in the longitudinal direction to put the tool on the connection board, followed by a light rotational movement about the longitudinal direction relative to the connection board.
    [0011] Preferably, it can be provided that:the locking fingers penetrate into the substantially L-shaped notches by longitudinal passages formed in the connection plate,between the locking position and the release position, the locking fingers remain permanently engaged at least partially in the longitudinal passages.
    The permanent engagement of the locking fingers in the longitudinal passages ensures that the locking slide can be maneuvered unhindered from its release position to its locking position. The user does not have to worry about the relative positioning in rotation of the locking slide around the longitudinal drive shaft relative to the connection plate and its longitudinal passages.
    Advantageously, the locking slide and the locking fingers can be made in one piece, which avoids a delicate assembly of the locking fingers, which are small parts, on the slide.
    [0014] Preferably, the locking fingers may comprise a tapered sloped end. The inclined slope promotes a good engagement of the surgical tool in the notches L when the surgical tool, after its installation on the translation connection plate, has undergone an incomplete rotation relative to the connection plate .
    [0015] Preferably, it can be provided that:the groove is formed on the outer cylindrical surface of the longitudinal drive shaft,a frustoconical portion extends from the groove by increasing cross section away from the first end.
    The frustoconical section makes it possible to progressively radially expand the operating ring when the user moves it from its locking position to its release position. This facilitates the handling of the operating ring. In addition, the user moving the operating ring to its release position is thus oppose a gradually increasing intensity force. This avoids a too abrupt movement of the operating ring, maneuver that could cause an untimely and unfortunate fall of the surgical tool released by the movement of the operating ring in the release position.
    Advantageously, it can be provided that the operating ring is provided with at least one longitudinal slot allowing its radial expansion. This makes it easy and inexpensive to provide a radially expandable character to the operating ring.
    To ensure irreproachable sterility to the surgical block, more and more practitioners wish to have a disposable tool holder that is supplied in the sterile state to the operating room and is discarded after use. This requires providing a tool holder inexpensive and that can not be reused. For this purpose, it is advantageous to provide that the slider is made of plastic.
    Indeed, in an operating room, reuse is possible if the tool holder has been re-sterilized. In this regard, gas sterilization devices, such as ethylene oxide, or gamma radiation are not available in a surgical block and are generally implemented by an external provider. The only sterilization device directly available in an operating room is the autoclave. However, the plastic melts when it is autoclaved. Thus, the locking slide would be out of order if one sought to reuse the tool holder by a re-sterilization in the operating room to circumvent the single-use prescription formulated by practitioners.
    Preferably, the slider may be PET. PET is a plastic material that has sufficient elasticity to achieve reversible ratcheting, and sufficient rigidity to provide a reliable snap. This limits the risk of inadvertent breakage of the slide, breakage that would make the tool holder unusable, and the risk of accidental reverse maneuver of the snap, reverse maneuver that could lead to a fall of the surgical tool and therefore to a pollution or deterioration.
    For easy and quick assembly of the tool holder, the longitudinal drive shaft may comprise a hollow tubular end portion of the rod in which is inserted by force the connection plate. In addition, the shaft of the longitudinal shaft drive can be hollow along its length to further limit the weight of the tool holder.
    In these cases, the connection plate can be easily and quickly inserted into the hollow tubular end portion according to a knurled cylindrical section.
    To ensure proper machining when using the tool holder in the surgical block, the connection plate and the shaft of the longitudinal drive shaft may be metal. The toolholder thus has sufficient rigidity effectively limiting the risk of sagging that may compromise the geometry of the work performed by the surgeon.
    Other objects, features and advantages of the present invention will emerge from the following description of particular embodiments, made in relation to the attached figures, among which:<tb> fig. 1 <SEP> is a perspective view of a tool holder according to one embodiment of the invention, with a slider in the locking position;<tb> fig. 2 <SEP> is a partial view in longitudinal section of the tool holder of FIG. 1;<tb> fig. 3 <SEP> is a detail view of FIG. 2;<tb> fig. 4 <SEP> is a perspective view of the tool holder of FIG. 1, with the slider in the release position;<tb> fig. 5 <SEP> is a partial view in longitudinal section of the tool holder of FIG. 4;<tb> fig. 6 <SEP> is a partial perspective view of the tool holder of FIG. 1, at one end of which is disposed a surgical tool type bur for milling the acetabular cavity of a patient; and<tb> figs. 7 and 8 <SEP> are perspective views of two burs adapted to be connected to the tool holder of FIG. 1.
    An example of a tool holder 1 according to the invention is illustrated in FIGS. 1 to 6. This tool holder 1 is intended to carry and rotate a surgical tool such as a mill 2 for milling the acetabular cavity of a patient.
    Examples of such a mill 2 are illustrated in FIGS. 7 and 8. In these figures, the cutters 2 are substantially in the form of a substantially hemispherical cup 3 provided with a plurality of teeth 4 sharpened. To ensure its attachment to the tool holder 1, each cutter 2 comprises a fastening structure 5 with four branches 5a to 5d radial arranged in a cross, extending from the center of the cup 3 towards the annular edge of the cup 3 In fig. 7, all the branches 5a to 5d are integral with the annular edge of the cup 3. In FIG. 8, only two branches 5a and 5c are integral with the annular edge of the cup 3. The burs 2 may nevertheless have a different number of branches, for example two or three.
    Referring to FIG. 1, the tool holder 1 comprises a longitudinal drive shaft 6 comprising a first end 6a. The first end 6a comprises a connecting plate 7 shaped to removably receive a mill 2 and to rotate it about the longitudinal direction I-I. The connection plate 7 is a bayonet-type connection plate 7 having notches 7a to 7d with a substantially L-shaped longitudinal profile adapted to receive said surgical tool 2. The number of notches 7a to 7d and their arrangement is a function of the number and arrangement of the branches 5a to 5d of the mill 2.
    At its second end 6b, the longitudinal drive shaft 6 comprises a section 6c of non-circular cross section (here hexagonal) for driving in rotation of the longitudinal drive shaft 6 by drive means with motor.
    An outer grip sleeve 8 is pivotally connected to the longitudinal drive shaft 6 and allows the surgeon to hold in hand and orient the tool holder 1 when the longitudinal drive shaft 6 is driven into position. rotation.
    The tool holder 1 also comprises a locking slider 9, slidably disposed on the longitudinal drive shaft 6, being movable between a locking position (FIGS. 1 to 3 and 6), in which means 10 carried by the locking slider 9 cooperate with the connection plate 7 to hold said surgical tool 2 on the connection plate 7, and a release position (FIGS 4 and 5), in which said surgical tool 2 can be separated from the connection board 7.
    The device does not include elastic return means, such as a coil spring, to permanently recall the locking slider 9 to its locking position: it is the user who must manually move the locking slider 9 from its locking position to its release position, and vice versa.
    The locking means 10 comprise locking fingers 12a to 12d carried by the locking slide 9.
    In the locking position (Figures 1 to 3 and 6), the longitudinal locking fingers 12a to 12d are engaged in notches 7a to 7d substantially L-shaped in a length sufficient to prevent extraction of branches 5a to 5d or 5a and 5c of the surgical tool 2 out of the substantially L-shaped notches 7a to 7d In the release position (Figs 4 and 5), the longitudinal locking fingers 12a-12d are at least partially removed from the notches 7a to 7d substantially L-shaped, sufficient to allow extraction of the branches 5a to 5d or 5a and 5c of the surgical tool 2 out of notches 7a to 7d substantially L-shaped.
    The locking slider 9 and the locking fingers 12a to 12d are made in one piece.
    The locking fingers 12a to 12d comprise a beveled end inclined slope 120a to 120d.
    The tool holder 1 comprises retaining means 11 for reversible snap-fastening for holding the locking slide 9 in the locking position.
    We see more particularly in FIG. 3 that the reversible latching means 11 comprise:an operating ring 13 elastically expandable radially and forming part of the locking slidera rib 14 carried by the operating ring 13, and a groove 15 formed on the outer cylindrical surface of the longitudinal drive shaft 6, the rib 14 and the groove 15 being shaped to engage one in the other in a locking position.
    However, it is possible to provide an inverted latching system, in which the rib 14 is carried by the outer cylindrical surface of the longitudinal drive shaft 6, and in which the groove 15 is formed in the operating ring 13. .
    The device thus does not include elastic return means, such as a coil spring, to maintain the locking slide 9 in the locking position.
    [0040] Also seen in FIG. 3 that a frustoconical portion 16 extends from the groove 15 and gradually increases in cross section away from the first end 6a.
    To facilitate the radial expansion of the operating ring 13, the operating ring 13 is provided with two slots 17a and 17b longitudinal. The operating ring 13 is thus in the form of two half rings connected together elastically. A different number of longitudinal slots may nevertheless be provided depending on the mechanical characteristics of the material constituting the operating ring 13.
    The operating ring 13 is made of plastic. Good results have been obtained using polyethylene, which has elasticity allowing expansion deformation with limited risk of failure. And the polyethylene after expansion is able to resume a shape and dimensions very close to the shape and initial dimensions, which limits the risk of inadvertent escape of the snap.
    We see more particularly in Figs. 2 and 5 that the locking slide 9 and the locking fingers 12a to 12d are made in one piece.
    Also shown in Figs. 2 and 5 that the longitudinal drive shaft 6 comprises a rod 6d hollow end end portion 6e in which is inserted in force the connection plate 7. To do this, the connection plate 7 comprises a cylindrical section to Knurling 18. The connecting plate 7 and the rod 6d are metal.
    Alternatively, the rod 6d can be hollow over its entire length.
    Similarly, at the other end 6b of the longitudinal drive shaft 6, the section 6c of non-circular cross section can be inserted into force in another hollow tubular end portion of the rod 6d, that the rod 6d is full for part of its length or digs over its entire length.
    It is observed in Figs. 1, 2, 4 and 5 that the locking fingers 12a to 12d respectively enter the notches 7a to 7d substantially L-shaped by longitudinal passages 19a to 19d formed in the connection plate 7. Between the locking position (fig. 1 and 2) and the release position (Figures 4 and 5), the locking fingers 12a to 12d remain permanently engaged at least partially in the respective longitudinal passages 19a to 19d.
    When using the tool holder 1 according to the invention, the user begins by manually moving the locking slider 9 towards the end 6b of the longitudinal drive shaft 6 to bring the slider locking 9 in the release position as illustrated in FIGS. 4 and 5. In this position, the locking fingers 12a to 12d are sufficiently extracted from the notches 7a to 7d to allow the introduction into them (or withdrawal from them) of the branches 5a to 5d or 5a and 5c of the strawberry 2.
    During the displacement of the locking slide 9 towards its release position, the rib 14 escapes from the groove 15 and then bears against the frustoconical section 16. The longitudinal slots 17a and 17b and the elasticity of the material constituting the operating ring 13 allow a radial expansion of the operating ring 13 as the diameter of the portion of the frustoconical portion 16 on which the rib 14 bears is supported.
    The radial expansion of the operating ring 13 is easily seen by comparison of FIG. 2, on which the operating ring 13 has an outer diameter D1, with FIG. 5, on which the operating ring 13 has an outer diameter D2 greater than D1.
    Once the locking slider 9 in the release position, it remains in the release position, not being biased to its locking position by elastic return means. The user then approaches the mill 2 of the connection plate 7 by an axial translation movement in the longitudinal direction I-I illustrated by the arrow 20. The branches 5a to 5d or 5a and 5c of the mill 2 then enter the portions extending longitudinally from L-shaped notches 7a to 7d.
    Once the branches 5a to 5d or 5a and 5c reached the end of these longitudinally extending portions of notches 7a to 7d, the user applies to the mill 2 a rotation about the longitudinal direction I-I, by a movement illustrated by the arrow 21, to bring the branches 5a to 5d or 5a and 5c of the mill 2 at the closed end of the portions extending substantially transversely notches 7a to 7d L-shaped.
    Finally, the user manually moves the locking slide 9 from its release position to its locking position until the rib 14 snaps into the groove 15. If the user has not completed the rotational movement illustrated by the arrow 21 that incompletely, inclined slopes 120a to 120d provided at the end of the beveled ends of the locking fingers 12a to 12d complete, during the displacement of the locking slide 9, to move the branches 5a to 5d or 5a and 5c at the end of the portions extending substantially transversely of the notches 7a to 7d.
    The snap of the rib 14 in the groove 15 opposes an accidental movement of the locking slide 9 to its release position. The locking fingers 12a to 12d are then sufficiently inserted into the notches 7a to 7d L-shaped to prevent relative movement of the cutter 2 relative to the longitudinal drive shaft 6 in a reverse movement from that illustrated by the Arrow 21. The cutter 2 can then be rotated by the longitudinal drive shaft 6 about the longitudinal direction I-I to be milled the acetabular cavity of a patient.
    After performing the milling, the locking slider 9 is operated in a reverse manner from its locking position to its release position. The cutter 2 is then removed from the connection plate 7 by applying a reverse movement to that illustrated by the arrow 21, then by applying a reverse movement to that illustrated by the arrow 20.
    If the tool holder 1 is provided for a single use, it is then discarded. If the operating room staff tries to contravene this single-use prescription and attempts to re-sterilize the tool holder 1 in an autoclave, the locking slide 9 made of plastic melts, so that the tool holder is rendered unusable.
    If the tool holder 1 is provided for reuse, it is entrusted to a certified external service provider to carry out sterilization by gas or gamma rays. In this case, it is possible not to completely disassemble the tool holder 1 to perform the sterilization, it being devoid of elastic return means capable of accumulating and store polluted particles.
    The present invention is not limited to the embodiments that have been explicitly described, but it includes the various variants and generalizations contained in the field of the claims below.
    权利要求:
    Claims (12)
    [1]
    A tool holder (1) for a surgical tool (2) such as a milling cutter for milling a patient's acetabular cavity, the tool holder (1) comprising:- A longitudinal drive shaft (6) comprising a first end (6a) with a connection plate (7) shaped to removably receive said surgical tool (2) and to rotate it about the longitudinal direction (I). -I),- A locking slider (9) slidably disposed on the longitudinal drive shaft (6) being movable between a locking position, in which locking means (10) carried by the locking slider (9). cooperate with the connection board (7) to retain said surgical tool (2) on the connection board (7), and a release position, wherein said surgical tool (2) can be separated from the board (7). ), in which:The tool holder (1) is devoid of elastic return means of the locking slide (9) in the locked position,- reversible ratchet holding means (11) make it possible to hold the locking slide (9) in the locking position,characterized in that the retentive locking means (11) comprise:An elastically expandable operating ring (13) radially and forming part of the locking slide (9),- a rib (14) carried by one of the operating ring (13) or the longitudinal drive shaft (6), and a groove (15) formed on the other of the operating ring (13). ) or the longitudinal drive shaft (6), the rib (14) and the groove (15) being shaped to engage one into the other in a locking position.
    [2]
    2. Tool holder (1) according to claim 1, characterized in that:- The connection plate (7) is a connection plate (7) bayonet type having notches (7a-7d) substantially L-shaped adapted to receive said surgical tool (2),The locking means (10) comprise longitudinal locking fingers (12a-12d) carried by the locking slide (9),In the locking position, the longitudinal locking fingers (12a-12d) penetrate into the substantially L-shaped notches (7a-7d) in order to retain the said surgical tool (2),In the release position, the longitudinal locking fingers (12a-12d) are at least partially removed from the substantially L-shaped notches (7a-7d).
    [3]
    Tool holder (1) according to claim 2, characterized in that:The locking fingers (12a-12d) penetrate into the substantially L-shaped notches (7a-7d) through longitudinal passages (19a-19d) formed in the connection plate (7),- Between the locking position and the release position, the locking fingers (12a-12d) remain permanently engaged at least partially in the longitudinal passages (19a-19d).
    [4]
    4. Tool holder (1) according to one of claims 2 or 3, characterized in that the locking slider (9) and the locking fingers (12a-12d) are manufactured in one piece.
    [5]
    5. Tool holder (1) according to any one of claims 2 to 4, characterized in that the locking fingers (12a-12d) comprise a sloped end inclined slope (120a-120d).
    [6]
    6. Tool holder (1) according to any one of claims 1 to 5, characterized in that:The groove (15) is formed on the outer cylindrical surface of the longitudinal drive shaft (6),- A frustoconical section (16) extends from the groove (15) increasing in cross section away from the first end (6a).
    [7]
    7. Tool holder (1) according to any one of claims 1 to 6, characterized in that the operating ring (13) is provided with at least one longitudinal slot (17a, 17b) allowing its radial expansion.
    [8]
    8. Tool holder (1) according to any one of claims 1 to 7, characterized in that the operating ring (13) is plastic.
    [9]
    9. Tool holder (1) according to claim 8, characterized in that the operating ring (13) is PET.
    [10]
    10. Tool holder (1) according to any one of claims 1 to 9, characterized in that the longitudinal drive shaft (6) comprises a rod (6d) with tubular end portion (6e) hollow in which is inserted in force the connection plate (7).
    [11]
    11. Tool holder (1) according to claim 10, characterized in that the connection plate (7) is inserted into the tubular end portion (6e) of the rod (6d) in a cylindrical section provided with a knurling (18).
    [12]
    12. Tool holder (1) according to one of claims 10 or 11, characterized in that the connection plate (7) and the rod (6d) are metal.
    类似技术:
    公开号 | 公开日 | 专利标题
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    EP0826340A2|1998-03-04|Support for surgical staple of elastic, superelastic or shape memory type
    FR2481103A1|1981-10-30|MEDICAL BISTOURI FOR COLLECTING A BLOOD DROP AND METHOD FOR MANUFACTURING THE SAME
    FR3041239A1|2017-03-24|DEVICE FOR THE STERILE COUPLING OF A PERCUTANE SURGICAL INSTRUMENT AND A DRIVE TOOL AND METHOD FOR MAKING SUCH A COUPLING
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    EP1894540A1|2008-03-05|Dental or surgical handpiece
    FR2731895A1|1996-09-27|Self-sealing trocar with automatic closure
    WO2014191663A1|2014-12-04|Osteosynthesis device comprising a cervico-cephalic screw
    FR3000380A1|2014-07-04|Assembly for inserting implant into part i.e. bone, of e.g. human body, has sheath comprising bearing seat for implant in state of insertion of implant in sheath and in state of separation of implant from gripping device
    CH707195B1|2018-05-31|Tool holder for surgical tool.
    CA3132926A1|2020-11-19|Device for holding and releasing an object and corresponding methods
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    EP3595754A1|2020-01-22|Needle protection device for a pre-filled syringe with staked needle, and syringe comprising such a device
    同族专利:
    公开号 | 公开日
    FR3028169A1|2016-05-13|
    FR3028169B1|2020-02-14|
    CH710378B1|2020-02-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP3485821A1|2017-10-10|2019-05-22|Symmetry Medical Manufacturing, Inc.|Orthopaedic reamer system|CA1031945A|1974-08-06|1978-05-30|Bernhard Bellmann|Milling cutter for preparing socket joints in complete prosthetic hip joint replacements|
    US5462548A|1992-07-06|1995-10-31|Pappas; Michael J.|Acetabular reamer|
    CH690021A5|1994-09-28|2000-03-31|Precifar Sa|Cutter holder and cutter set for surgery.|
    US6264647B1|2000-03-02|2001-07-24|Precifar S.A.|Instrument holder for surgical instrument|
    US8192453B2|2006-03-16|2012-06-05|Valla Joseph R|Surgical cutting tool and system|
    GB0812406D0|2008-07-07|2008-08-13|Smith & Nephew|Medical device|
    法律状态:
    2017-10-13| PLI| Licence|Free format text: LICENCE NON EXCLUSIVE Name of requester: QUANTIEMEPLUS SA, CH |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1460782A|FR3028169B1|2014-11-07|2014-11-07|TOOL HOLDER FOR SURGICAL TOOL|
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