Twist-down implant delivery technologies

• US 20060111771A1
• Filed: 11/02/2005
• Published: 05/25/2006
• Est. Priority Date: 03/26/2003
• Status: Active Grant

• Current Assignee: Biosensors International Group, Ltd.
• Original Assignee: Biosensors International Group, Ltd.
• Inventors: Licata, David, Ton, Dai T., George, William R.
• Granted Patent: US 7,771,463 B2
• Time in Patent Office: Days
• US Class Current: 623/1.150
• CPC Class Codes: A61B 2017/1205 Introduction devices
• CPC Class Codes: A61B 2017/12054 Details concerning the detachment of the occluding device from the introduction device
• CPC Class Codes: A61B 2017/12095 Threaded connection
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2/962 having an outer sleeve
• CPC Class Codes: A61F 2002/8486 provided on at least one of the ends
• CPC Class Codes: A61F 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2002/9583 Means for holding the stent on the balloon, e.g. using protrusions, adhesives or an outer sleeve
• CPC Class Codes: A61F 2002/9665 with additional retaining means

Abstract

Medical devices and methods for delivery or implantation of tubular prostheses within hollow body organs and vessels or other luminal anatomy are disclosed. A prosthesis is held in a compressed from upon an inner wire of a delivery guide by twisting the device. The subject technologies may be used in the treatment of atherosclerosis in stenting procedures or for other purposes.

Claims

1. A system for treating a body organ, the system comprising:

an elongate member having a distal portion;

a prosthesis comprising a near end, a far end and a structure extending therebetween, where the structure comprises a mesh, lattice, or woven structure that is able to reduce in diameter upon rotation of the near end relative to the far end, the prosthesis further comprising a near mating portion and a far mating portion, where the near and far ends are rotated relative to one another in a first direction to maintain a reduced diameter configuration; and

a near seat receiving the near mating portion of the prosthesis and a far seat receiving the far mating portion of the prosthesis, wherein when the mating portions are nested with the near and far seats, the near and far ends of the prosthesis are restrained from rotating in a second direction to expand the prosthesis.

2. The deliver system of claim 1, wherein the near seat and near mating portion comprise a near retaining means for retaining the near end of the prosthesis to the elongate member, and wherein the far seat and far mating portion comprise a far retaining means for retaining the far end of the prosthesis to the elongate member.

3. The deliver system of claim 1, wherein the near and far seats each comprise a respective geometry shaped to receive the near and far mating portions respectively.

4. The delivery system of claim 3, wherein the near mating portion of the prosthesis comprises a plurality of near projections and the far mating portion of the prosthesis comprises a plurality of far projections where each projection extends from the near and far ends of the prosthesis respectively, and wherein the near seat geometry comprises a plurality of openings shaped to receive at least one of the near projections and wherein the far seat geometry comprises a plurality of openings shaped to receive at least one of the far projections.

5. The delivery system of claim 4, where each of the plurality of near seat openings comprises an elongate opening.

6. The delivery system of claim 4, where the plurality of near seat openings comprises a plurality of pockets.

7. The delivery system of claim 4, where each of the plurality of far seat openings comprises an elongate opening.

8. The delivery system of claim 4, where the plurality of far seat openings comprises a plurality of pockets.

9. The delivery system of claim 3, where the near seat geometry is selected from “

L”

shape, “

T”

shape, “

V”

shape, “

C”

shape, circular, rectangular, square, polygonal, triangular and elongate forms.

10. The delivery system of claim 3, where the far seat geometry is selected from “

L”

shape, “

T”

shape, “

V”

shape, “

C”

shape, circular, rectangular, square, polygonal, triangular and elongate forms.

11. The delivery system of claim 3, where the near mating portion comprises a plurality of hook shaped members.

12. The delivery system of claim 11, where the near seat geometry comprises an opening shaped to receive a portion of the hook shaped member.

13. The delivery system of claim 3, where the far mating portion comprises a plurality of hook shaped members.

14. The delivery system of claim 13, where the near seat geometry comprises an opening shaped to receive a portion of a hook shaped member.

15. The delivery system of claim 1, where the near seat and far seat are attached to the elongate member.

16. The delivery system of claim 15, where the elongate member further comprises an inner member and an outer member having a distal end.

17. The delivery system of claim 16, where the inner member extends through at least a portion of the outer member and out through the distal end of the outer member, and where the inner member is moveable relative to the distal end of the outer member.

18. The delivery system of claim 17, where the outer member comprises a radiopaque marker.

19. The delivery system of claim 17, where outer member includes the near seat and the inner member includes the far seat.

20. The delivery system of claim 17, where the inner member and outer member are axially moveable relative to one another.

21. The delivery system of claim 17, where the inner member and outer member are rotatable relative to one another.

22. The delivery system of claim 21, where the near seat and far seat are releasably lockable to control rotation of the near seat relative to the far seat.

23. The delivery system of claim 17, where the prosthesis is mounted about a distal portion of the inner member and adjacent to the distal end of the outer member.

24. The delivery system of claim 16, where the outer member is slidably located over at least the near seat.

25. The delivery system of claim 16, where the outer member further comprises a wire or filament located in a wall of the outer member, such that when pulled, the wire or filament tears the outer member.

26. The delivery system of claim 16, where the outer member further comprises an end portion configured to evert.

27. The delivery system of claim 1, where the prosthesis comprises a stent.

28. The delivery system of claim 27, where an Af temperature of the stent is set for a shape memory.

29. The delivery system of claim 28, where the Af temperature of the stent is set for super-elasticity.

30. The delivery system of claim 27, where the stent is a self-expanding stent.

31. The delivery system of claim 27, where the stent further comprises a therapeutic agent.

32. The delivery system of claim 27, where the stent further comprises a radiopaque marker.

33. The delivery system of claim 1, where the elongate member further comprises a radiopaque marker.

34. The delivery system of claim 1, further comprising a first sleeve located over at least the near seat.

35. The delivery system of claim 34, where the first sleeve is flexible.

36. The delivery system of claim 1, further comprising a second sleeve located over at least the far seat.

37. The delivery system of claim 36, where the second sleeve is flexible.

38. A delivery system for treating a body organ, the system comprising:

an elongate member having a distal portion and an outer member;

a prosthesis comprising a near end, a far end and a structure extending therebetween, where the structure comprises a mesh, lattice, or woven structure that is able to reduce in diameter upon rotation of the near end relative to the far end, the prosthesis further comprising a near mating portion and a far mating portion, where the ends are rotated relative to one another in a first direction to reduce a diameter of the prosthesis to mount the prosthesis to the distal portion of the elongate member;

a near seat receiving the near mating portion of the prosthesis and a far seat receiving the far mating portion of the prosthesis, where when the mating portions are nested with the near and far seats, the near and far ends of the prosthesis are restrained from rotating in a second direction to expand the prosthesis; and

the outer member located over at least the near seat.

39-112. -112. (canceled)