PROSTHESIS ANCHORING AND DEPLOYING DEVICE

• US 20120283816A1
• Filed: 07/20/2012
• Published: 11/08/2012
• Est. Priority Date: 11/05/2004
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Jordan, Gary, Leanna, Gary J., Norton, Paul K., Molloy, Dean
• Granted Patent: US 9,114,039 B2
• Time in Patent Office: Days
• US Class Current: 623/1.12
• 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 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2002/9528 for retrieval of stents
• CPC Class Codes: A61F 2002/9665 with additional retaining means

Abstract

A system for intraluminally delivering and deploying stents and other prostheses includes an outer catheter, an inner catheter movable axially relative to the outer catheter, and an anchoring device mounted to a distal end region of the inner catheter. The anchoring device includes one or more control features that interact with a linking structure proximally disposed on the prosthesis, preferably including one or more loops. The control features and loops interact by surface engagement to anchor the prosthesis relative to the inner catheter in a nonfrictional manner, thus to maintain lower axial prosthesis deployment and retraction forces. In one version of the anchor, the control features extend radially outward from a sleeve. In another version, the control features are formed in respective recesses which also receive the loops or other linking structure.

Claims

1. A prosthesis delivery system comprising:

an outer elongate tubular member defining an outer lumen;

an inner elongate tubular member positioned within the outer lumen;

a tubular sleeve fixedly attached to an outer surface of the inner elongate tubular member, the tubular sleeve having a proximal end, a distal end, and a wall, the wall defining at least one recess extending radially inward from an annular outside surface of the wall, each recess having sidewalls and a bottom surface extending between the sidewalls, each recess extending at least a portion of the sleeve length;

a self-expanding implantable tubular prosthesis having a prosthesis length greater than the sleeve length, the prosthesis comprising a plurality of strands, the prosthesis positioned within the outer lumen and around the inner elongate tubular member so that at least one of the plurality of strands is positioned within the at least one recess of the tubular sleeve;

wherein each recess has only one strand of the prosthesis positioned therein and the outside surface of the tubular sleeve does not extend beyond an outer surface of the prosthesis.

2. The system of claim 1, the at least one recess comprising a first pair of side by side recesses parallel to one another, each recess having a first opening at the proximal end of the tubular sleeve and a second opening at the distal end of the tubular sleeve.

3. The system of claim 2, the plurality of strands comprising a first strand, the first strand forming a first end loop of the prosthesis, wherein a first portion of the first end loop is positioned within one of the two parallel recesses of the first pair of recesses and a second portion of the first end loop is positioned within the other of the two parallel recesses of the first pair of recesses.

4. The system of claim 3, the sleeve having a sleeve length extending from the proximal end to the distal end of the sleeve, the first end loop having a loop length greater than the sleeve length.

5. The system of claim 3, wherein the prosthesis is a single loop stent.

6. The system of claim 3, the prosthesis further comprising a covering engaged to an outer surface of the prosthesis.

7. The system of claim 6, wherein the prosthesis is a stent and the covering is a graft.

8. The system of claim 2, the at least one recess further comprising a second pair of side by side recesses parallel to one another and positioned opposite the first pair of side by side recesses, the plurality of strands further comprising a second strand, the second strand forming a second end loop of the prosthesis, wherein a first portion of the second end loop is positioned within one of the two parallel recesses of the second pair of parallel recesses and a second portion of the second end loop is positioned within the other of the two parallel recesses of the second pair of recesses.

9. The system of claim 1, the plurality of strands comprising a first strand forming a first end loop of the prosthesis, the at least one recess comprising a first recess, the first recess extending to a point distal to the proximal end of the sleeve, the first recess having a shape corresponding to a shape of the first end loop of the prosthesis.

10. The system of claim 9, the tubular sleeve having a proximal end and a distal end, the first recess extending from a first opening at the distal end of the tubular sleeve to a second opening at the distal end of the tubular sleeve.

11. A prosthesis delivery system comprising:

an outer elongate tubular member defining an outer lumen;

an inner elongate tubular member positioned within the outer lumen;

a tubular sleeve comprising a wall having an annular outside surface, the wall defining a first recess extending radially inward from the annular outside surface, the first recess comprising sidewalls and a bottom surface extending between the sidewalls;

a self-expanding implantable prosthesis positioned within the outer lumen and around the inner elongate tubular member, the prosthesis comprising a first elongate end loop, the first elongate end loop being positioned within the first recess;

wherein the first recess has a shape complementary to a shape of the first elongate end loop and only the first elongate end loop of the prosthesis is coupled to the tubular sleeve by the first recess so that the tubular sleeve, the medial feature, and the first elongated end loop form an asymmetrical coupling.

12. The system of claim 11, the first recess comprising a medial feature extending radially from the bottom surface of the first recess and towards the annular outside surface from an inside central portion of the first recess, the medial feature extending to the annular outside surface of the tubular sleeve, the first elongate end loop surrounding the medial feature.

13. The system of claim 11, wherein an axial force against the prosthesis does not act through a central axis of the tubular sleeve.

14. The system of claim 11, the tubular sleeve having a proximal end, a distal end and a length extending from the proximal end to the distal end, the first recess extending from a first opening at the distal end of the tubular sleeve to a second opening at the proximal end of the tubular sleeve, the first elongate end loop having a loop length greater than the length of the tubular sleeve, wherein a loop portion of the first elongate end loop extends beyond the proximal end of the tubular sleeve.

15. The system of claim 11, the tubular sleeve having a proximal end and a distal end, the first recess extending from a first opening at the distal end of the tubular sleeve to a second opening at the distal end of the tubular sleeve, wherein the shape of the first recess is complementary to a loop portion of the first elongated end loop.

16. The system of claim 11, the prosthesis further comprising a covering coupled to an outer surface of the prosthesis.

17. A prosthesis delivery system comprising:

an outer elongate tubular member defining an outer lumen;

an inner elongate tubular member positioned within the outer lumen;

a tubular sleeve affixed to the inner elongate tubular member, the tubular sleeve having a proximal end, a distal end, and a wall having an annular outside surface, the wall defining a first recess extending radially inward from the annular outside surface, the first recess comprising sidewalls and a bottom surface extending between the sidewalls;

a self-expanding implantable prosthesis, the prosthesis positioned within the outer lumen and around the inner elongate tubular member, the prosthesis being in a contracted state when the prosthesis is within the outer lumen, the prosthesis comprising a first end loop positioned at a proximal end of the prosthesis;

wherein the first recess has a shape complementary to a shape of a loop portion of the first end loop and the proximal end of the tubular sleeve is proximal to the first end loop.

18. The system of claim 17, wherein the tubular sleeve maintains the position of the prosthesis relative to the tubular sleeve when the stent is in a contracted state.

19. The system of claim 17, the prosthesis further comprising a covering affixed to an outer surface of the prosthesis.

20. The system of claim 17, wherein the sidewalls and the bottom surface of the first recess substantially surround the first end loop.