澳大利亚专利AU2013200055A1 System and method for treating tissue using an expandable antenna

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专利摘要:
SYSTEM AND METHOD FOR TREATING TISSUE USING AN EXPANDABLE ANTENNA A method of repairing an inner vessel wall includes the step of inserting at least a portion of a microwave ablation device (10) into a vessel. The microwave ablation device (10) includes an inner conductor (18) disposed within an outer conductor (20) and defines a longitudinal axis. The method also includes the steps of inserting a repairing sealant (50) into the vessel such that the repairing sealant (50) is disposed between an inner vessel wall and the outer conductor (20) and expanding at least a portion of the outer conductor (20) relative to the longitudinal axis to force at least a portion of the repairing sealant (50) into the inner vessel wall. The method also includes the step of delivering energy to at least one of the inner conductor (18) and the outer conductor (20) to activate the repairing sealant (50) to repair the inner vessel wall. 'x"T" 18 20e 2020d 30 20c -- +"A" 20b 20a 4 10 20e 20d 30 20c "IT" 2 20b 20 20a "B" 40 "iC"
公开号:AU2013200055A1
申请号:U2013200055
申请日:2013-01-02
公开日:2013-07-25
发明作者:Kenlyn S. Bonn；Anthony C. Lee；Mani N. Prakash；Francesca Rossetto
申请人:Vivant Medical LLC；
IPC主号:A61B17-00

专利说明:
S&F Ref: P058863 AUSTRALIA PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT Name and Address Vivant Medical, Inc., of 5920 Longbow Drive, Boulder, of Applicant : Colorado, 80301, United States of America Actual Inventor(s): Anthony C. Lee Kenlyn S. Bonn Mani N. Prakash Francesca Rossetto Address for Service: Spruson & Ferguson St Martins Tower Level 35 31 Market Street Sydney NSW 2000 (CCN 3710000177) Invention Title: System and method for treating tissue using an expandable antenna The following statement is a full description of this invention, including the best method of performing it known to me/us: 5845c(6997723_1) 1 SYSTEM AND METHOD FOR TREATING TISSUE USING AN EXPANDABLE ANTENNA FIELD [00011 The present disclosure relates to electrosurgical ablation devices and methods. More particularly, the disclosure relates to treating tissue using a deployable antenna capable of being expanded. BACKGROUND 100021 In the treatment of diseases such as cancer, certain types of cancer cells have been found to denature at elevated temperatures that are slightly lower than temperatures normally injurious to healthy cells. These types of treatments, known generally as hyperthermia therapy, typically utilize electromagnetic radiation to heat diseased cells to temperatures above 41 'C while maintaining adjacent healthy cells at lower temperatures where irreversible cell destruction will not occur. Other procedures utilizing electromagnetic radiation to heat tissue also include ablation and coagulation of the tissue. Such microwave ablation procedures, e.g., such as those performed for menorrhagia, are typically done to ablate and coagulate the targeted tissue to denature or kill it. Many procedures and types of devices utilizing electromagnetic radiation therapy are known in the art. Such microwave therapy is typically used in the treatment of tissue and organs such as the prostate, heart, and liver. [00031 One non-invasive procedure generally involves the treatment of tissue (e.g., a tumor) underlying the skin via the use of microwave energy. The microwave energy is able to non invasively penetrate the skin to reach the underlying tissue. However, this non-invasive procedure may result in the unwanted heating of healthy tissue. Thus, the non-invasive use of microwave energy requires a great amount of control. This is partly why a more direct and precise method of applying microwave radiation has been sought. [00041 Presently, there are several types of microwave probes in use, e.g., monopole, dipole, and helical. One type is a monopole antenna probe consisting of a single, elongated microwave conductor exposed at the end of the probe. The probe is sometimes surrounded by a dielectric sleeve. The second type of microwave probe commonly used is a dipole antenna consisting of a coaxial construction having an inner conductor and an outer conductor with a dielectric separating a portion of the inner conductor and a portion of the outer conductor. In the 2 monopole and dipole antenna probe, microwave energy generally radiates perpendicularly from the axis of the conductor. [00051 Because of the perpendicular pattern of microwave energy radiation, conventional antenna probes are typically designed to be inserted directly into the tissue, e.g., a tumor, to be radiated. However, such typical antenna probes commonly fail to provide uniform heating axially and/or radially about the effective length of the probe. 100061 It is often difficult to assess the extent to which the microwave energy will radiate into the surrounding tissue, i.e., it is difficult to determine the area or Volume of surrounding tissue that will be ablated. Furthermore, when conventional microwave antennas are inserted directly into the tissue, e.g., cancerous tissue, there is a potential of dragging or pulling cancerous cells along the antenna body into other parts of the body during insertion, placement, or removal of the antenna probe. [00071 In certain circumstances, it is advantageous to create a relatively large ablation region, which often requires multiple ablation instruments inserted into a patient. OBJECT [00081 It is the object of the present invention to substantially overcome or ameliorate one or more of the disadvantages of the prior art, or at least provide a useful alternative. SUMMARY 100091 As used herein the term "distal" refers to that portion of the microwave ablation device, or component thereof, farther from the user while the term "proximal" refers to that portion of the microwave ablation device or component thereof, closer to the user. 100101 According to another aspect of the present disclosure, a method of repairing an inner vessel wall is provided. The method includes the step of inserting at least a portion of a microwave ablation device into a vessel for purposes of treating conditions such as, but not limited to, macroangiopathy. The microwave ablation device includes an inner conductor disposed within an outer conductor. The inner conductor defines a longitudinal axis. The method also includes the steps of inserting a repairing sealant into the vessel such that the 3 repairing sealant is disposed between an inner vessel wall and the outer conductor and expanding at least a portion of the outer conductor relative to the longitudinal axis to force at least a portion of the repairing sealant into the inner vessel wall. The method also includes the step of delivering energy to at least one of the inner conductor and the outer conductor to activate the repairing sealant to repair the inner vessel wall. [00111 The method may further include the steps of retracting the expanded portion of the outer conductor toward the longitudinal axis, moving the microwave ablation device within the vessel relative to the repairing sealant, repeating the expanding step, and repeating the delivering step. [00121 Alternatively or in addition, the inserting steps of the method may occur substantially simultane. [0013] Alternatively or in addition, the repairing sealant may include a mesh matrix configured to engage at least a portion of the outer conductor prior to the inserting steps of the method. [0014] The method may further include the steps of retracting the expanded portion of the outer conductor toward the longitudinal axis and withdrawing the inserted portion of the microwave ablation device from the vessel. [00151 Alternatively or in addition, the expanding step of the method may cause the outer conductor to separate into a plurality of conductors along at least a portion thereof. [00161 Alternatively or in addition, the repairing sealant may be activated by heat generated as a result of the delivering step of the method. [00171 According to a further aspect of the present disclosure, a microwave treatment system is provided. The system includes an electrosurgical energy source and a microwave antenna assembly operatively connected to the electrosurgical energy source. The microwave antenna assembly includes a radiating portion configured to deliver energy from the energy source to tissue of a patient. The radiating portion has an outer conductor and an inner conductor extending therethrough. The inner conductor is disposed within the outer conductor and defines a longitudinal axis. One of the inner conductor and the outer conductor is movable relative to 4 the other to cause at least a portion of the outer conductor to expand radially relative to the longitudinal axis. [00181 Alternatively or in addition, at least one of the outer and inner conductors may terminate in a distal tip configured to pierce tissue. 100191 Alternatively or in addition, the distal tip may be insulative. 100201 Alternatively or in addition, the outer conductor may include a plurality of deployable conductors disposed at least partially along a length thereof and configured to expand radially relative to the longitudinal axis. 100211 Alternatively or in addition, the plurality of deployable conductors may be configured to mechanically cut through tissue. [00221 Alternatively or in addition, the plurality of deployable conductors may be configured to cut through tissue with the aid of energy from the power source. [00231 Alternatively or in addition, at least a portion of the outer conductor may be flexible. [00241 Alternatively or in addition, a distance between the outer conductors and the inner conductor may define an ablation region when the outer conductors are radially expanded relative to the longitudinal axis. [00251 Alternatively or in addition, the outer conductor and the inner conductor may be configured to form an electromagnetic field within the ablation region upon actuation thereof. 100261 Alternatively or in addition, distal movement of the outer conductor relative to the inner conductor may cause at least a portion of the outer conductor to expand radially relative to the longitudinal axis. 100271 Alternatively or in addition, proximal movement of the inner conductor relative to the outer conductor may cause at least a portion of the outer conductor to expand radially relative to the longitudinal axis.
5 10028] According to a further aspect of the present disclosure, a method of repairing a vessel is provided. The method includes the step of inserting at least a portion of an ablation device into a vessel. The ablation device includes an inner conductor disposed within an outer conductor. The method also includes the step of inserting a repairing sealant into the vessel such that the repairing sealant is disposed between the vessel and the outer conductor. The method also includes the steps of expanding at least a portion of the outer conductor toward the vessel and delivering energy to at least one of the inner conductor and the outer conductor to activate the repairing sealant to repair the inner vessel wall. [00291 The method may also include the steps of retracting the expanded portion of the outer conductor away from the vessel, moving the ablation device within the vessel, and repeating the expanding and delivering steps. BRIEF DESCRIPTION OF THE DRAWINGS [00301 Various embodiments of the present disclosure are described herein with reference to the drawings wherein: [00311 Fig. I shows a diagram of a microwave antenna assembly in accordance with an embodiment of the present disclosure; 100321 Fig. 2 is a schematic view of the microwave antenna assembly of Fig. 1 connected to a generator; 100331 Fig. 3 is a cross-sectional view taken along section line 3-3 of Fig. 2; [00341 Fig. 4 is a side view of a distal portion of the microwave antenna assembly of Figs. 1-3; 100351 Fig. 5 is a perspective view of the distal portion of the microwave ablation device of Figs. 1-4; [00361 Fig. 6A is a side view of the distal portion of the microwave ablation device of Figs. 1-5 unexpanded and disposed within a vessel; and 6 [00371 Fig. 6B is a side view of the distal portion of the microwave ablation device of Figs. 1 6 expanded and disposed within the vessel. DETAILED DESCRIPTION 100381 Embodiments of the presently disclosed microwave ablation devices are described in detail with reference to the drawings, in which like reference numerals designate identical or corresponding elements in each of the several views. [00391 An ablation device (e.g., a microwave ablation device) in accordance with the present disclosure is referred to in the figures as reference numeral 10. Referring initially to Fig. 1, microwave ablation device 10 includes a handle portion 13 and a microwave antenna 12 having a shaft or feedline 14. Feedline 14 includes an outer conductor 20 and an inner conductor 18, that defines a longitudinal axis X-X. A power transmission cord 21 is shown to connect microwave ablation device 10 to a suitable electrosurgical generator 22 (see Fig. 2). Additionally, an actuation element 7 is illustrated in Fig. 1 in accordance with various embodiments of the present disclosure. [00401 As seen in Fig. 2, a distal tip 30 is disposed adjacent to or coupled to a distal end of inner conductor 18 and/or outer conductor 20. In the illustrated embodiment, the proximal end of feedline 14 includes a coupler 19 that electrically couples antenna 12 to generator 22 via power transmission cord 21. As will be discussed in further detail below, outer conductor 20 includes a distal portion 23 configured to expand radially relative to longitudinal axis X-X such that distal portion 23 separates into a plurality of radially deployable conductors (e.g., conductors 20a, 20b, 20c, 20d, and 20e) upon actuation of actuation element 7. [00411 Microwave ablation device 10 may be introduced to a treatment site via a straight, arcuate, non-deployable and/or deployable applicator or introducer. In embodiments, tip 30 is configured to pierce tissue to facilitate introduction of microwave ablation device 10 to the treatment site. Tip 30 may be insulative and/or formed of a dielectric material. 100421 As described above and as shown in Figs. 2 and 3, feedline 14 may be in the form of a coaxial cable. Portions of feedline 14 may be flexible and formed of outer conductor 20 surrounding inner conductor 18. Inner conductor 18 and/or outer conductor 20 may be made of a suitable conductive metal that may be semi-rigid or flexible, such as, for example, copper, 7 gold, or other conductive metals with similar conductivity values. Alternatively, portions of inner conductor 18 and outer conductor 20 may also be made from stainless steel that may additionally be plated with other materials, e.g., other conductive materials, to improve their properties, e.g., to improve conductivity or decrease energy loss, etc. [0043] With continued reference to Fig. 3, feedline 14 of antenna 12 is shown including a dielectric material 28 surrounding at least a portion of a length of inner conductor 18 and outer conductor 20 and/or conductors 20a-20e surrounding at least a portion of a length of dielectric material 28 and/or inner conductor 18. That is, a dielectric material 28 is interposed between inner conductor 18 and outer conductor 20, to provide insulation therebetween and may be comprised of any suitable dielectric material. [00441 Referring now to Figs. 4 and 5, the distal portion 23 of outer conductor 20 is separated into a plurality of radially deployable outer conductors 20a, 20b, 20c, 20d, and 20e. Conductors 20a-20e are illustrative only in that the distal portion 23 of outer conductor 20 may be separated into any two or more radially deployable conductors. Outer conductor 20 may be at least partially formed of a flexible material wherein separation of the distal portion 23 of outer conductor 20 into conductors 20a-20e may be achieved during the manufacturing process by cutting or slicing through the flexible material along at least a portion of the distal portion 23 of outer conductor 20 in multiple locations around the circumference of distal portion 23. Distal tip 30 is in mechanical cooperation with each conductor 20a-20e or inner conductor 18. In one embodiment, inner conductor 18 is movable relative to outer conductor 20 via translation of actuation element 7 (See Fig. 1), as discussed in detail below. In another embodiment, outer conductor 20 is movable relative to inner conductor 18 and distal tip 30, as discussed in detail below. In some embodiments, distal tip 30 is also in electrical communication with either outer conductors 20a-20e or inner conductor 18. [00451 Translation of actuation element 7 (see Fig. 1) causes movement of inner conductor 18 (substantially along longitudinal axis X-X) with respect to outer conductor 20 or vice-versa. More specifically, distal translation of actuation element 7 causes inner conductor 18 to move distally in the direction of arrow "A" and proximal translation of actuation element 7 causes inner conductor 18 to move proximally in the direction of arrow "B." In response to proximal movement of inner conductor 18, the distal portion 23 of outer conductor 20 is forced or expanded radially relative to longitudinal axis X-X in the direction of arrow "C" (see Figs. 4 and 8 5) such that outer conductor 20 separates into conductors 20a-20e. Thus, an ablation region 40, as defined by the boundaries of conductors 20a-20e (including the area between conductors 20a 20e and inner conductor 18), is expanded (e.g., widened) as a distance between conductors 20a 20e and inner conductor 18 becomes larger. In response to distal movement of inner conductor 18, conductors 20a-20e retract toward longitudinal axis X-X in the direction opposite to arrows "C". 100461 In embodiments, at least a portion of each conductor 20a-20e is flexible to facilitate the radial expansion of conductors 20a-20e relative to longitudinal axis X-X. The ablation region 40 may be an electromagnetic field generated by opposing polarities of inner conductor 18 (e.g., positive) relative to conductors 20a-20e (e.g., negative) for ablating tissue disposed within the ablation region 40. [0047] In one embodiment, translation of actuation element 7 (see Fig. 1) causes movement of outer conductor 20 (substantially along longitudinal axis X-X) with respect to inner conductor 18 and distal tip 30. In this embodiment, inner conductor 18 and distal tip 30 are stationary along the longitudinal axis X-X. More specifically, distal translation of actuation element 7 causes outer conductor 20 to move distally in the direction of arrow "A" and proximal translation of actuation element 7 causes outer conductor 20 to move proximally in the direction of arrow "B." In response to distal movement of outer conductor 20, the distal portion 23 of outer conductor 20 is forced or expanded radially relative to longitudinal axis X-X, in the direction of arrow "C" (see Figs. 4 and 5) such that outer conductor 20 separates into conductors 20a-20e. In response to proximal movement of outer conductor 20, conductors 20a-20e retract toward longitudinal axis X-X in the direction opposite to arrow "C". [00481 Each conductor 20a-20e may be configured to pierce or slice through tissue, either mechanically and/or with the aid of energy, e.g., radiofrequency energy, heat energy, resistive energy, etc. In the embodiment where conductors 20a-20e can mechanically pierce or slice through tissue, conductors 20a-20e may be thin enough to pierce or slice through tissue upon the exertion of a predetermined amount of force (e.g., the amount of force generated upon retraction of inner conductor 18 and/or radial expansion of conductors 20a-20e). In other words, antenna 12 is positioned within tissue when conductors 20a-20e are disposed in a non-expanded, parallel configuration relative to the longitudinal axis X-X and then the conductors 20a-20e are expanded to pierce into and through tissue. As a result thereof, tissue is embedded within the 9 ablation zone 40 for treatment. Additionally or alternatively, conductors 20a-20e may be configured to conduct energy, e.g., from generator 22, to slice or pierce through tissue. Deployment of conductors 20a-20e also helps secure the antenna 12 relative to a tumor and maintain the antenna 12 in place during treatment. 100491 Referring specifically to Fig. 4, conductors 20a-20e are shown radially expanded relative to the longitudinal axis X-X prior to insertion of antenna 12 into tissue "T". In this scenario, a distal force applied to antenna 12 in the direction of arrow "A" causes conductors 20a-20e to slice through the tissue "T" such that at least a portion of tissue "T" is disposed within ablation region 40. [00501 Referring specifically to Fig. 5, antenna 12 is shown inserted into or through tissue "T" prior to radial expansion of conductors 20a-20e relative to the longitudinal axis X-X. In this scenario, a proximal force applied to antenna 12 in the direction of arrow "B" causes conductors 20a-20e to slice through tissue "T" such that at least a portion of tissue "T" is disposed within ablation region 40. 100511 As discussed above, conductors 20a-20e may be configured to pierce or slice through tissue mechanically and/or with the aid of energy from generator 22. In the case of conductors 20a-20e utilizing the aid of energy from generator 22 to pierce or slice through tissue, conductors 20a-20e may be energized prior to engagement with tissue "T" or, alternatively, substantially simultaneously therewith. 100521 By retracting and expanding the conductors 20a-20e during a procedure, the effective length and impedance of the antenna 12 is changed, thereby changing the performance of the antenna 12. In this manner, the antenna 12 may be actively tuned during a procedure. 100531 Referring now to Figs. 6A and 6B, feedline 14 is shown disposed within a vessel "V". A vessel repairing sealant 50 (e.g., fibrin or elastic/collagen matrix) is disposed between an inner wall of vessel "V" and outer conductor 20 and is configured to repair the inner walls of vessel "V" once properly deployed. Sealant 50 may be, for example, a sleeve and/or a mesh matrix configured to be slid over at least a portion of feedline 14 such that upon deployment of feedline 14 within vessel "V", sealant 50 is disposed between the inner surface of vessel "V" and at least a portion of feedline 14. As illustrated in Fig. 6A, feedline 14 is inserted within 10 vessel "V" while conductors 20a-20e are disposed in a non-expanded or retracted state relative to longitudinal axis X-X. Once feedline 14 is positioned relative to sealant 50 within vessel "V", actuation element 7 is translated proximally in the direction of arrow "F" to retract inner conductor 18, thereby pulling distal tip 30 proximally to force conductors 20a-20e to expand radially relative to longitudinal axis X-X. As discussed above, actuation element 7 may, in certain embodiments, be translated distally in the direction of arrow "E" to move outer conductor 20 distally to engage distal tip 30, thereby forcing conductors 20a-20e to expand radially relative to the longitudinal axis X-X. 100541 In either scenario, radial expansion of conductors 20a-20e forces sealant 50 to engage the inner wall of vessel "V" to repair cracks or damaged areas in the vessel "V", as shown in Fig. 6B. In embodiments, once sealant 50 engages the inner wall of vessel "V", generator 22 is configured to selectively supply energy (e.g., RF or microwave energy) to conductors 20a-20e to activate or cure sealant 50 via the generation of heat. That is, sealant 50 may be a mesh matrix having vessel repairing gel or collagen disposed thereon that is configured to leach to the inner wall of vessel "V" upon the application of heat caused by the supply of energy through conductors 20a-20e and/or inner conductor 18. Examples of such vessel repairing sealants include, without limitation, Evicel@ liquid fibrin sealant and the CryoSeal@ FS system. 100551 Once a desired portion of sealant 50 is applied to the inner wall of vessel "V", conductors 20a-20e may be radially retracted toward longitudinal axis X-X via actuation of actuation element 7 such that antenna 12 is movable proximally (arrow "F") or distally (arrow "E") within vessel "V" for purposes of removal therefrom or for purposes of movement relative to sealant 50, as shown in Fig. 6A. In this manner, distal portion 23 of outer conductor 20 may be positioned or re-positioned to substantially align with a portion of sealant 50 that has not yet been forced to engage the inner wall of vessel "V" and/or been activated or cured by the application of heat generated by the supply of energy through conductors 20a-20e and/or inner conductor 18. 100561 The described embodiments of the present disclosure are intended to be illustrative rather than restrictive, and are not intended to represent every embodiment of the present disclosure. Various modifications and variations can be made without departing from the spirit or scope of the disclosure as set forth in the following claims both literally and in equivalents recognized in law.

权利要求:
Claims (20)
[1] 1. A method of repairing an inner vessel wall, comprising the steps of: inserting at least a portion of a microwave ablation device into a vessel, the microwave ablation device including an inner conductor disposed within an outer conductor and defining a longitudinal axis; inserting a repairing sealant into the vessel such that the repairing sealant is disposed between an inner vessel wall and the outer conductor; expanding at least a portion of the outer conductor relative to the longitudinal axis to force at least a portion of the repairing sealant into the inner vessel wall; and delivering energy to at least one of the inner conductor and the outer conductor to activate the repairing sealant to repair the inner vessel wall.
[2] 2. A method according to claim 1, further comprising the steps of: retracting the expanded portion of the outer conductor toward the longitudinal axis; moving the microwave ablation device within the vessel relative to the repairing sealant; repeating the expanding step; and repeating the delivering step.
[3] 3. A method according to claim 1, wherein the inserting steps occur substantially simultaneously.
[4] 4. A method according to claim 1, wherein the repairing sealant includes a mesh matrix configured to engage at least a portion of the outer conductor prior to the inserting steps.
[5] 5. A method according to claim 1, further comprising the steps of: retracting the expanded portion of the outer conductor toward the longitudinal axis; and withdrawing the inserted portion of the microwave ablation device from the vessel.
[6] 6. A method according to claim 1, wherein the expanding step causes the outer conductor to separate into a plurality of conductors along at least a portion thereof.
[7] 7. A method according to claim 1, wherein the repairing sealant is activated by heat generated as a result of the delivering step. 12
[8] 8. A microwave treatment system, comprising: an electrosurgical energy source; a microwave antenna assembly operatively connected to the electrosurgical energy source, the microwave antenna assembly including: a radiating portion configured to deliver energy from the energy source to tissue of a patient, the radiating portion having an outer conductor and an inner conductor extending therethrough, the inner conductor disposed within the outer conductor and defining a longitudinal axis; wherein one of the inner conductor and the outer conductor is movable relative to the other to cause at least a portion of the outer conductor to expand radially relative to the longitudinal axis.
[9] 9. A microwave treatment system according to claim 8, wherein the at least one of the outer and inner conductors terminates in a distal tip configured to pierce tissue.
[10] 10. A microwave treatment system according to claim 9, wherein the distal tip is insulative.
[11] 11. A microwave treatment system according to claim 8, wherein the outer conductor includes a plurality of deployable conductors disposed at least partially along a length thereof and configured to expand radially relative to the longitudinal axis.
[12] 12. A microwave treatment system according to claim 11, wherein the plurality of deployable conductors are configured to mechanically cut through tissue.
[13] 13. A microwave treatment system according to claim 11, wherein the plurality of deployable conductors are configured to cut through tissue with the aid of energy from the power source.
[14] 14. A microwave treatment system according to claim 11, wherein at least a portion of the outer conductor is flexible.
[15] 15. A microwave treatment system according to claim 11, wherein a distance between the outer conductors and the inner conductor defines an ablation region when the outer conductors are radially expanded relative to the longitudinal axis. 13
[16] 16. A microwave treatment system according to claim 15, wherein the outer conductor and the inner conductor are configured to form an electromagnetic field within the ablation region upon actuation thereof.
[17] 17. A microwave treatment system according to claim 8, wherein distal movement of the outer conductor relative to the inner conductor causes at least a portion of the outer conductor to expand radially relative to the longitudinal axis.
[18] 18. A microwave treatment system according to claim 8, wherein proximal movement of the inner conductor relative to the outer conductor causes at least a portion of the outer conductor to expand radially relative to the longitudinal axis.
[19] 19. A method of repairing a vessel, comprising the steps of: inserting at least a portion of an ablation device into a vessel, the ablation device including an inner conductor disposed within an outer conductor; inserting a repairing sealant into the vessel such that the repairing sealant is disposed between the vessel and the outer conductor; expanding at least a portion of the outer conductor toward the vessel; and delivering energy to at least one of the inner conductor and the outer conductor to activate the repairing sealant to repair the inner vessel wall.
[20] 20. A method according to claim 19, further comprising the steps of: retracting the expanded portion of the outer conductor away from the vessel; moving the ablation device within the vessel; repeating the expanding step; and repeating the delivering step. Dated 20 December, 2012 Vivant Medical, Inc. Patent Attorneys for the Applicant/Nominated Person SPRUSON & FERGUSON

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法律状态:
2013-10-24| PC1| Assignment before grant (sect. 113)|Owner name: COVIDIEN LP Free format text: FORMER APPLICANT(S): VIVANT MEDICAL, INC. |

2014-07-24| FGA| Letters patent sealed or granted (standard patent)|

2017-07-27| MK14| Patent ceased section 143(a) (annual fees not paid) or expired|

优先权:

申请号 | 申请日 | 专利标题

US13/344,753|US9113931B2|2012-01-06|2012-01-06|System and method for treating tissue using an expandable antenna|

US13/344,753||2012-01-06||

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