IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0952492
(2004-09-27)
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등록번호 |
US-7367975
(2008-05-06)
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발명자
/ 주소 |
- Malecki,William
- Francis,Dan
- Horne,Kenneth
- Deem,Mark E.
- Gifford,Hanson
- Alejandro,Jose
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출원인 / 주소 |
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대리인 / 주소 |
Townsend and Townsend and Crew LLP
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인용정보 |
피인용 횟수 :
133 인용 특허 :
174 |
초록
▼
Methods for treating anatomic tissue defects such as patent foramen ovale (PFO) generally involve positioning a distal end of an elongate catheter device at the site of the anatomic defect, exposing an expandable housing and energy transmission member out of the distal end of the catheter device, en
Methods for treating anatomic tissue defects such as patent foramen ovale (PFO) generally involve positioning a distal end of an elongate catheter device at the site of the anatomic defect, exposing an expandable housing and energy transmission member out of the distal end of the catheter device, engaging the housing with tissues at the site of the anatomic defect, applying suction to the tissues via the housing to bring the tissues together; and applying energy to the tissues with the energy transmission member to substantially close the anatomic defect acutely. Apparatus generally include an elongate catheter body, a housing extending from a distal end of the catheter body for engaging tissues at the site of the anatomic defect, and an energy transmission member adjacent a distal end of the housing, the energy transmission member having at least one substantially planar surface.
대표청구항
▼
What is claimed is: 1. Apparatus for treating an anatomic defect in a heart, the apparatus comprising: an elongate catheter body having a proximal end and a distal end; a housing extending from the distal end of the catheter body for engaging tissues at the site of the anatomic defect, said housing
What is claimed is: 1. Apparatus for treating an anatomic defect in a heart, the apparatus comprising: an elongate catheter body having a proximal end and a distal end; a housing extending from the distal end of the catheter body for engaging tissues at the site of the anatomic defect, said housing including a narrow proximal end coupled with the distal end of the catheter body and a flared distal end flexible, said housing further including a foot extending laterally from the flared distal end for contacting the tissues, said flexible foot having a larger diameter than a diameter of the flared distal end; and an energy transmission member adjacent a distal end of the housing, the energy transmission member having at least one substantially planar surface; wherein the housing is adapted to apply vacuum to the tissues to bring them together and position them against the energy transmission member. 2. Apparatus as in claim 1, further comprising a sheath disposed over at least part of the catheter body and having a proximal end and a distal end, wherein the energy transmission member and the housing are collapsible and axially movable relative to the sheath from a collapsed position within the sheath to an expanded position beyond the distal end of the sheath. 3. Apparatus as in claim 2, wherein the sheath includes a bend, closer to its distal end than its proximal end. 4. Apparatus as in claim 3, wherein the catheter body includes a bend, closer to its distal end than a proximal end of the sheath, and wherein the catheter body bend and the sheath bend allow a user to change an angle of orientation of the energy transmission member and the housing by moving the catheter body relative to the sheath. 5. Apparatus as in claim 2, wherein the sheath includes a stretchable distal end for facilitating movement of the housing and the energy transmission member from the expanded configuration to the collapsed configuration within the sheath. 6. Apparatus as in claim 1, wherein the housing and the flexible foot comprise different materials. 7. Apparatus as in claim 1, wherein the electrode is movable relative to the housing to apply energy to the tissues at multiple locations within the larger diameter of the flexible foot. 8. Apparatus as in claim 1, wherein the flared distal end has a shape selected from the group consisting of circular, ovoid, elliptical, rectangular, triangular, pentagonal, hexagonal, octagonal, crescent-shaped and fan-shaped. 9. Apparatus as in claim 1, wherein the housing comprises at least one material selected from the group consisting PET, DACRON��, other polyesters, polypropylene, PTFE, ePTFE, PEEK, nylon, polyurethane, polyethylene, silicone, urethane and metal. 10. Apparatus as in claim 9, wherein the housing further comprises a lubricious coating over at least part of an outer surface. 11. Apparatus as in claim 1, wherein the housing comprises at least one supportive strut for preventing complete collapse of the housing when vacuum is applied to the tissues. 12. Apparatus as in claim 11, wherein the housing and the strut(s) comprise the same material. 13. Apparatus as in claim 11, wherein the housing and the strut(s) comprise different materials. 14. Apparatus as in claim 1, wherein the housing comprises at least one radiopaque marker or radiopaque material. 15. Apparatus as in claim 1, further comprising: an irrigation tube extending through the catheter body and having a distal aperture disposed within the housing; and a vacuum tube extending through the catheter body and having a distal aperture disposed within the housing. 16. Apparatus as in claim 15, wherein an inner surface of the housing comprises a plurality of ridges and valleys forming channels to direct irrigation fluid from the irrigation tube distal aperture toward the tissues and subsequently toward the vacuum tube distal aperture. 17. Apparatus as in claim 16, wherein the inner surface further includes an irrigation fluid blocking surface feature to help direct fluid forward and away from the irrigation tube distal aperture. 18. Apparatus as in claim 15, wherein the irrigation tube is adapted to allow passage of a guidewire therethrough. 19. Apparatus as in claim 1, wherein the at least one energy transmission member comprises a planar radiofrequency energy electrode disposed adjacent the distal end of the housing. 20. Apparatus as in claim 19, wherein the electrode is axially movable in and out of the distal end of the housing. 21. Apparatus as in claim 19, wherein the electrode is directly attached to the housing. 22. Apparatus as in claim 19, wherein the planar surface electrode has a shape selected from the group consisting of circular, ovoid, elliptical, rectangular, triangular, pentagonal, hexagonal, octagonal, crescent-shaped and fan-shaped. 23. Apparatus as in claim 19, wherein the planar surface electrode comprises: an outer rim extending at least partially around an outer circumference of the electrode; and a plurality of metallic struts formed in a pattern within the outer rim. 24. Apparatus as in claim 19, wherein the electrode further comprises at least one guidewire aperture to allow passage of a guidewire through the electrode. 25. Apparatus as in claim 19, further comprising a thermocouple attached to the electrode. 26. Apparatus as in claim 1, wherein the at least one energy transmission member comprises a radiofrequency energy electrode disposed adjacent the distal end of the housing, the electrode having at least two planar surfaces, for promoting contact with asymmetrical tissues. 27. Apparatus as in claim 26, wherein electrode comprises: a first planar surface; a bend; and a second planar surface. 28. Apparatus as in claim 27, wherein the first and second planes are parallel to one another. 29. Apparatus as in claim 1, wherein the energy transmission member comprises a planar, expandable, braided wire. 30. Apparatus for treating an anatomic defect in a heart, the apparatus comprising: an elongate catheter body having a proximal end and a distal end; a housing extending from the distal end of the catheter body for engaging tissues at the site of the anatomic defect; and an energy transmission member adjacent a distal end of the housing, the at least one energy transmission member comprising a planar radiofrequency energy electrode, the energy transmission member having at least one substantially planar surface and includes an outer rim extending at least partially around an outer circumference of the electrode, and a plurality of metallic struts formed in a pattern within the outer rim; wherein the housing is adapted to apply vacuum to the tissues to bring them together and position them against the energy transmission member. 31. Apparatus as in claim 30, wherein the rim is discontinuous. 32. Apparatus as in claim 30, wherein the rim includes one or more inward bends directed toward the struts, the inward bends adapted to promote collapsibility of the electrode. 33. Apparatus as in claim 30, wherein some of the struts are attached to other struts as well as to the outer rim. 34. Apparatus as in claim 30, wherein the struts are attached only to the outer rim and not to one another. 35. Apparatus as in claim 30, wherein the pattern of struts includes at least one area of more closely positioned struts relative to another area of less closely positioned struts, such that different areas of the electrode provide different amounts of energy transmission to the tissues. 36. Apparatus as in claim 30, wherein the pattern of struts includes at least one area of thicker struts relative to another area of thinner struts, such that different areas of the electrode provide different amounts of energy transmission to the tissues. 37. Apparatus as in claim 30, wherein the pattern of struts includes at least one fold line along which the electrode folds to allow the electrode to collapse. 38. Apparatus as in claim 30, wherein the struts are attached asymmetrically to the outer rim such that a first half of the housing and electrode folds into a second half of the housing and electrode when the housing and electrode assume their collapsed configurations. 39. Apparatus as in claim 30, wherein the struts are attached to the outer rim at between 8 and 16 attachment points to enhance collapsibility of the electrode. 40. Apparatus as in claim 30, further comprising a plurality of metallic attachment members extending from the outer rim for attaching the electrode to the housing. 41. Apparatus as in claim 40, wherein the plurality of attachment members comprises: an inferior attachment member for attaching proximally to an inferior portion of the housing; and multiple superior attachment members for attaching proximally to a superior portion of the housing. 42. Apparatus as in claim 41, wherein the inferior attachment member extends onto an inferior portion of the catheter body, and the superior attachment members extend onto a superior portion of the catheter body. 43. Apparatus as in claim 41, wherein the inferior attachment member divides before attaching to the outer rim at two attachment points. 44. Apparatus as in claim 41, wherein the inferior attachment member curves asymmetrically before attaching to the outer rim. 45. Apparatus as in claim 40, wherein the struts are attached to the outer rim at locations apart from attachment points of the attachment members to the outer rim. 46. Apparatus as in claim 40, wherein the struts are attached to the outer rim at attachment points of the attachment members to the outer rim. 47. Apparatus for treating an anatomic defect in a heart, the apparatus comprising: an elongate catheter body having a proximal end and a distal end; a housing extending from the distal end of the catheter body for engaging tissues at the site of the anatomic defect; and an energy transmission member adjacent a distal end of the housing, the energy transmission member having at least one substantially planar surface, wherein the at least one energy transmission member comprises a planar radiofrequency energy electrode disposed adjacent the distal end of the housing, and the electrode further includes at least one guidewire aperture to allow passage of a guidewire through the electrode, wherein the housing is adapted to apply vacuum to the tissues to bring them together and position them against the energy transmission member. 48. Apparatus as in claim 47, wherein the guidewire aperture is disposed along the electrode in an offset position to facilitate positioning of the electrode over the anatomic defect. 49. Apparatus as in claim 47, wherein the at least one guidewire aperture comprises two offset guidewire apertures for facilitating positioning of the electrode over the anatomic defect.
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