Implantable medical endoprosthesis delivery system

• US 8,092,508 B2
• Filed: 03/30/2006
• Issued: 01/10/2012
• Est. Priority Date: 03/30/2006
• Status: Active Grant

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Stryker Corporation, Stryker Nv Operations Limited (Stryker Corporation)
• Inventors: Leynov, Alexander, Obara, Robert, Molaei, Masoud, Doan, Hong, Peckham, John, Roush, Lukas M., Arends, Jennifer M.
• Primary Examiner(s): Bui, Vy Q
• Application Number:
  US11/395,479
• Publication Number:
  US 20070233224A1
• Time in Patent Office: 2,112 Days
• Field of Search: 623/1.11, 606/108, 606/191, 606/194, 606/195, 606/198
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2/9661 the proximal portion of the stent or stent-graft is released first
• CPC Class Codes: A61F 2002/9665 with additional retaining means

Abstract

Implantable medical endoprosthesis delivery systems and articles are provided.

Claims

1. An implantable medical endoprosthesis delivery system, comprising:

a delivery member in the form of a wire or a slotted hypotube;

a sheath;

an endoprosthesis disposed between the delivery member and the sheath;

a first member and second member disposed about the delivery member, the first and second members comprising a lumen through which the delivery member passes, only the first and second members engaged to and positioned entirely within the endoprosthesis where the second member is configured so that;

when the sheath moves proximally or distally with respect to the delivery member, the endoprosthesis remains substantially stationary in a longitudinal direction with respect to the delivery member; and

when the delivery member moves proximally or distally, the endoprosthesis remains substantially stationary with respect to the delivery member; and

a tip connected to the delivery member, the tip being distal to the endoprosthesis, where the first member is positioned between the second member and the tip.

2. The system of claim 1, wherein the delivery member is in the form of a wire.

3. The system of claim 1, wherein the delivery member is in the form of a slotted hypotube.

4. The system of claim 3, wherein the tube is disposed over a guidewire.

5. The system of claim 1, wherein the endoprosthesis is a self-expanding prosthesis.

6. The system of claim 1, wherein the second member comprises a coating supported by the delivery member.

7. The system of claim 6, wherein the coating has one or more grooves into which the endoprosthesis can be at least partially disposed.

8. The system of claim 6, wherein the coating has a deformable surface against which the endoprosthesis can be at least partially disposed.

9. The system of claim 6, wherein the coating comprises a polymer.

10. The system of claim 1, wherein the second member comprises a seating member.

11. The system of claim 1, wherein the second member comprises windings of a material supported by the delivery member.

12. The system of claim 11, wherein the material of the windings has a durometer of from about 65 A to about 55 D.

13. The system of claim 11, wherein the windings have an average width and an average pitch, and a ratio of the average pitch to the average width is at least about two.

14. The system of claim 11, wherein the windings have an average width and an average pitch, and a ratio of the average pitch to the average width is at most about five.

15. The system of claim 1, wherein the endoprosthesis includes a radiopaque material.

16. The system of claim 1, further comprising a bumper connected to the delivery member, the bumper being proximal to the endoprosthesis, and the bumper being configured to substantially prevent proximal movement of the endoprosthesis when the sheath is moved proximally.

17. The system of claim 16, further comprising a proximal sub-bumper located proximal to the bumper and attached to the delivery member, the proximal sub-bumper having a diameter, and a distal sub-bumper located distal to the bumper and attached to the delivery member, the distal sub-bumper having a diameter,

wherein the bumper has a lumen having a diameter larger than a diameter of the delivery member and through which the delivery member extends, the diameter of the lumen being smaller than the diameter of the proximal and distal sub-bumpers.

18. The system of claim 1, wherein the tip is bullet-shaped.

19. A method, comprising at least partially disposing the system of claim 1 into a body lumen of a subject.

20. An implantable medical endoprosthesis delivery system, comprising:

a delivery member in the form of a wire or a slotted hypotube;

a sheath;

an endoprosthesis having a proximal end and a distal end, disposed between the delivery member and the sheath;

a first seating member and a second seating member disposed between the delivery member and the endoprosthesis where the first seating member is positioned at the distal end of the endoprosthesis and the second seating member positioned at the proximal end of the endoprosthesis, only the first and second seating members being engaged to and positioned entirely within the endoprosthesis, wherein the first and second seating members are disposed about the delivery member and comprise a lumen through which the delivery member passes; and

a tip connected to the delivery member and being positioned distally to the first seating member.

21. A method, comprising at least partially disposing the system of claim 20 into a body lumen of a subject.

22. The system of claim 20, wherein the delivery member is in the form of a wire.

23. The system of claim 20, wherein the delivery member is in the form of a slotted hypotube.

24. The system of claim 20, wherein the seating member comprises a polymer.

25. The system of claim 20, wherein the seating member comprises a material having a durometer of about 55 D or less.

26. The system of claim 20, wherein the seating member applies a radial force to the endoprosthesis so that the endoprosthesis forms a friction fit with the sheath.

27. The system of claim 20, wherein the endoprosthesis includes a radiopaque material.

28. The system of claim 20, further comprising a bumper connected to the delivery member, the bumper being proximal to the endoprosthesis, and the bumper being configured to substantially prevent proximal movement of the endoprosthesis when the sheath is moved proximally.

29. The system of claim 20, where the tip is configured to substantially prevent distal movement of the endoprosthesis when the sheath is moved distally.

30. The system of claim 29, wherein the tip is bullet-shaped.