Stent delivery system having retention structure

• US 10,610,388 B2
• Filed: 02/16/2015
• Issued: 04/07/2020
• Est. Priority Date: 06/21/2010
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Amos, Michael Devon, Lane, John, Graham, Jacob, Leanna, Gary J., Hollett, Andrew A., Weisman, Michal
• Primary Examiner(s): Weng, Kai H
• Application Number:
  US14/623,264
• Publication Number:
  US 20150157480A1
• Time in Patent Office: Days
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• 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 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2220/0033 made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61M 2025/0096 being laterally outward extensions or tools, e.g. hooks or fibres
• CPC Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/0074 Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
• CPC Class Codes: A61M 25/01 Introducing, guiding, advancing, emplacing or holding catheters A61M25/10 takes precedence
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence
• CPC Class Codes: A61M 27/002 Implant devices for drainage of body fluids from one part of the body to another intraocular A61F9/00781; middle ear A61F11/202

Abstract

A stent delivery system including an elongate shaft of a medical device, a stent selectively coupled to a distal portion of the elongate shaft, and a coupling mechanism for selectively coupling the stent to the elongate shaft by inserting a tab on one of the stent or the elongate shaft into an opening in the other of the stent or the elongate shaft. The tab may be deflected from a first position to a second position to disengage the tab from the opening.

Claims

1. A stent delivery system comprising:

a drainage stent having a proximal end, a distal end, and lumen extending therethrough, the drainage stent including a tab extending radially inward into the lumen from a tubular wall of the drainage stent; and

an elongate shaft extending distally from a handle assembly, the elongate shaft having a distal end portion extending into the lumen of the drainage stent;

wherein the tab is configured to mate with an opening in the distal end portion of the elongate shaft to selectively couple the drainage stent to the elongate shaft.

2. The stent delivery system of claim 1, wherein the tab is formed as a unitary structure with the tubular wall of the drainage stent.

3. The stent delivery system of claim 1, wherein the tab is movable between a first position and a second position.

4. The stent delivery system of claim 3, wherein the tab is engaged in the opening in the first position.

5. The stent delivery system of claim 4, wherein the tab is disengaged from the opening in the second position.

6. The stent delivery system of claim 4, wherein a free end of the tab moves away from a central longitudinal axis of the drainage stent as the tab moves from the first position to the second position.

7. The stent delivery system of claim 6, wherein the tab is biased to move toward the first position.

8. The stent delivery system of claim 7, wherein the first position is an equilibrium position.

9. A stent delivery system comprising:

a drainage stent including a tubular member having a proximal end, a distal end, and lumen extending therethrough, the drainage stent including a tab extending radially inward into the lumen from an inner wall of the tubular member of the drainage stent; and

an elongate shaft having a distal end portion extending into the lumen of the drainage stent with an opening in the distal end portion positioned within the tubular member of the drainage stent;

wherein the tab is positioned in the opening in a first position to selectively couple the drainage stent to the elongate shaft.

10. The stent delivery system of claim 9, wherein the tab is movable from the first position to a second position.

11. The stent delivery system of claim 10, wherein the tab is disengaged from the opening in the second position.

12. The stent delivery system of claim 10, wherein a free end of the tab moves away from a central longitudinal axis of the drainage stent as the tab moves from the first position to the second position.

13. The stent delivery system of claim 10, wherein the tab is biased to move toward the first position.

14. A stent delivery system comprising:

a push catheter having a proximal end, a distal end, and a lumen extending therethrough;

a guide catheter extending through the lumen of the push catheter; and

a drainage stent disposed around a distal end portion of the guide catheter;

wherein the drainage stent includes a tab extending radially inward into engagement with the drainage stent to selectively couple the drainage stent to the guide catheter.

15. The stent delivery system of claim 14, wherein the tab is formed as a unitary structure with a tubular wall of the drainage stent.

16. The stent delivery system of claim 14, wherein the tab is movable between a first position and a second position.

17. The stent delivery system of claim 16, wherein the tab is engaged in an opening of the guide catheter in the first position and disengaged from the opening in the second position.

18. The stent delivery system of claim 16, wherein the tab is urged to the second position from the first position through movement of the guide catheter relative to the drainage stent.

19. The stent delivery system of claim 18, wherein the guide catheter engages to tab to urge the tab to the second position.

20. The stent delivery system of claim 14, wherein the distal end of the push catheter abuts a proximal end of the drainage stent.