STENT DELIVERY SYSTEMS AND LOCKING MEMBERS FOR USE WITH STENT DELIVERY SYSTEMS

• US 20120123516A1
• Filed: 09/23/2011
• Published: 05/17/2012
• Est. Priority Date: 11/17/2010
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: GERDTS, MICHAEL, VETSCH, JIM, GROFF, JOE, LARSON, DEREK
• Granted Patent: US 8,784,468 B2
• Time in Patent Office: Days
• US Class Current: 623/1.12
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61M 2025/0681 Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube
• 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: Y10T 24/1391 Article held by clip with spring [e.g., leaf, coil] member

Abstract

Stent delivery systems, locking members for preventing unwanted actuation of a actuation member on a stent delivery system, and methods for making and using the same are disclosed. An example stent delivery system may include an inner member. A deployment sheath may be disposed about the inner member. A stent may be disposed between the inner member and the deployment sheath. A handle may be coupled to the inner member and to the deployment sheath. The handle may include an actuation member. The actuation member may be configured to shift the longitudinal position of the deployment sheath relative to the inner member. A locking member may be disposed on the actuation member. The locking member may be configured to prevent unwanted actuation of the actuation member.

Claims

1. A stent delivery system, comprising:

an inner member;

a deployment sheath disposed about the inner member;

a stent disposed between the inner member and the deployment sheath;

a handle coupled to the inner member and to the deployment sheath;

wherein the handle includes an actuation member, the actuation member being configured to shift the longitudinal position of the deployment sheath relative to the inner member; and

a locking member disposed on the actuation member, the locking member being configured to prevent unwanted actuation of the actuation member.

2. The stent delivery system of claim 1, wherein the stent includes a self-expanding stent.

3. The stent delivery system of claim 1, wherein the actuation member includes a thumbwheel.

4. The stent delivery system of claim 1, wherein locking member is releasable attached to the actuation member

5. The stent delivery system of claim 1, wherein the locking member includes a grip portion for attaching to the actuation member and a handle portion, and wherein the grip portion is configured to shift between an attached configuration where the locking member is attached to the actuation member and a released configuration where the locking member can be removed from the actuation member.

6. The stent delivery system of claim 5, wherein the grip portion includes one or more gripping fingers.

7. The stent delivery system of claim 6, wherein the handle portion includes one or more depressible tabs.

8. The stent delivery system of claim 7, wherein gripping fingers are biased to extend radially inward.

9. The stent delivery system of claim 8, wherein applying a radially inward force to the depressible tabs shifts the gripping fingers from the attached configuration to the released configuration.

10. The stent delivery system of claim 9, wherein removing the radially inward force from the depressible tabs shifts the gripping fingers from the released configuration to the attached configuration.

11. The stent delivery system of claim 7, wherein the actuation member includes an outer flanged portion and an inner portion and wherein each of the gripping fingers includes a tab extending radially inward that is configured to engage the inner portion of the actuation member.

12. The stent delivery system of claim 1, wherein the locking member includes a distal edge and a proximal edge, and wherein at least one of the distal edge and the proximal edge is configured to engage the handle.

13. The stent delivery system of claim 1, wherein the handle includes a channel disposed adjacent to the actuation member and wherein the locking member includes one or more projections that are configured to extend into the channel.

14. A locking member for preventing unwanted actuation of a thumbwheel on a stent delivery system, the locking member comprising:

a body having a proximal edge and a distal edge, wherein at least one of the proximal edge and the distal edge is configured to engage a handle of the stent delivery system;

one or more gripping fingers coupled to the body, the gripping fingers being configured to engage the thumbwheel;

wherein the gripping fingers are configured to shift between an engaged configuration where the gripping fingers are engaged with the thumbwheel and a released configuration where the gripping fingers are released from the thumbwheel; and

one or more depressible tabs coupled to the body for shifting the position of the gripping fingers.

15. The locking member of claim 14, wherein gripping fingers are biased to extend radially inward.

16. The locking member of claim 15, wherein applying a radially inward force to the depressible tabs shifts the gripping fingers from the engaged configuration to the released configuration.

17. The locking member of claim 16, and wherein removing the radially inward force from the depressible tabs shifts the gripping fingers from the released configuration to the engaged configuration.

18. The stent delivery system of claim 14, wherein each of the gripping fingers includes a tab extending radially inward that is configured to engage the thumbwheel.

19. The stent delivery system of claim 14, wherein the locking member includes one or more projections that are configured to extend into a channel formed in the handle adjacent to the actuation member.

20. A method for preventing unwanted motion of a thumbwheel on a stent delivery system, the method comprising:

providing a locking member, the locking member comprising;

a body having a proximal edge and a distal edge, wherein at least one of the proximal edge and the distal edge is configured to engage a handle of the stent delivery system,

one or more gripping fingers coupled to the body, the gripping fingers being configured to engage the thumbwheel,

wherein the gripping fingers are configured to shift between an engaged configuration where the gripping fingers are engaged with the thumbwheel and a released configuration where the gripping fingers are released from the thumbwheel,

wherein the gripping fingers are biased to extend radially inward, and

one or more depressible tabs coupled to the body for shifting the position of the gripping fingers;

applying a radially inward force to the depressible tabs to shift the gripping fingers from the engaged configuration to the released configuration;

disposing the locking member on the thumbwheel; and

removing the radially inward force from the depressible tabs to shift the gripping fingers from the released configuration to the engaged configuration and to attach the locking member to the thumbwheel.