Implant delivery system with marker interlock

• US 20050222662A1
• Filed: 11/04/2004
• Published: 10/06/2005
• Est. Priority Date: 11/01/2002
• Status: Abandoned Application

• Current Assignee: Ev3 Peripheral Inc. (Medtronic Plc)
• Original Assignee: Ev3 Peripheral Inc. (Medtronic Plc)
• Inventors: Thompson, Paul J., Lee, Nathan T.
• Application Number:
  US10/982,537
• Publication Number:
  US 20050222662A1
• Time in Patent Office: Days
• US Class Current: 623/1.110
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• 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 2002/91508 the meander having a difference in amplitude along the band
• CPC Class Codes: A61F 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/91591 Locking connectors, e.g. using male-female connections
• 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
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers

Abstract

An implant delivery system is disclosed. The delivery system includes an elongated member having an implant mounting location. A self-expandable implant is mounted at the implant mounting location. The implant is held in a compressed orientation by a retractable sheath. An interlock structure prevents the implant from deploying prematurely as the sheath is retracted. The interlock structure includes radio-opaque markers that identify the position of the implant.

Claims

1-18. -18. (canceled)

19. An implant delivery system comprising

a) a distal end and a proximal end

b) an inner member;

c) an outer sheath;

d) an implant mounting location on the inner member;

e) an interlock structure comprising a first interlock geometry suitable for engaging an expandable implant;

f) an expandable implant positioned at d) comprising a second interlock geometry suitable for engaging the first interlock geometry prior to expansion, wherein expansion of the implant causes the first interlock geometry to disengage the second interlock geometry.

20. The implant delivery system of claim 19, wherein the implant is a stent.

21. The implant delivery system of claim 19, wherein the outer sheath is slideable over the inner member.

22. The implant delivery system of claim 21, wherein the outer sheath covers the implant when the implant is in an unexpanded configuration.

23. The implant delivery system of claim 22, wherein the retraction of the sheath permits the implant to expand.

24. The implant delivery system of claim 19, wherein the implant second geometry comprises at least one enlargement which engages the interlock structure'"'"'s first geometry.

25. The implant delivery system of claim 19, wherein the distal end is positioned at a deployment site in a patient'"'"'s body lumen and the proximal end is positioned external to the patient'"'"'s body.

26. The implant delivery system of claim 19, wherein the inner member is comprised of nylon.

27. The implant delivery system of claim 19, wherein the distal end is tapered.

28. The implant delivery system of claim 19, wherein the distal end comprises a flexible distal tip.

29. The implant delivery system of claim 19, wherein the implant is self expanding.

30. The implant delivery system of claim 19, wherein the interlock structure engaging the expandable implant prevents axial movement between the implant and the inner member while the interlock structure is engaged with the expandable implant.

31. The implant delivery system of claim 19, wherein the interlock structure is adjacent to the implant mounting location.

32. The implant delivery system of claim 19, wherein the interlock structure is secured to the inner member.

33. The implant delivery system of claim 19, wherein the interlock structure further comprises a plurality of geometries suitable for engaging the expandable implant.

34. The implant delivery system of claim 24, wherein the implant is further comprised of at least one strut having at least one free terminal end.

35. The implant delivery system of claim 34, wherein the enlargement is joined to a strut having one free terminal end.

36. The implant delivery system of claim 35, wherein the enlargement is comprised of a circle.

37. The implant delivery system of claim 24, wherein the interlock structure first geometry is comprised of a circle.

38. The implant delivery system of claim 33, wherein the interlock structure first geometry is sized to engage a plurality of enlargements.

39. The implant delivery system of claim 19, wherein the interlock structure first geometry is sized to engage a single enlargement.

40. The implant delivery system of claim 19, wherein the interlock structure engaging the expandable implant does not restrict radial motion of the implant.

41. The implant delivery system of claim 33, wherein at least one of the plurality of geometries is sized to receive a single enlargement and the remaining plurality of geometries are sized to receive two enlargements.

42. The implant delivery system of claim 34, wherein the interlock structure is comprised of a plurality of geometries and the implant is comprised of a plurality of enlargements, wherein each of the plurality of geometries engages a single enlargement.

43. The implant delivery system of claim 19, wherein the implant second geometry is comprised of a plurality of oblong enlargements.

44. The implant delivery system of claim 43, wherein interlock structure is comprised of a plurality of first geometries fitted to receive the plurality of oblong enlargements.

45. The implant delivery system of claim 19, wherein the implant second geometry is comprised of a plurality of circles.

46. The implant delivery system of claim 45, wherein interlock structure is comprised of a plurality of first geometries fitted to receive the plurality of circles.