MEDICAL DEVICE DELIVERY SYSTEM WITH FORCE REDUCTION MEMBER

• US 20160206456A1
• Filed: 01/15/2016
• Published: 07/21/2016
• Est. Priority Date: 01/16/2015
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Walsh, Kevin
• Granted Patent: US 10,159,587 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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

Abstract

Medical devices and methods for making and using medical devices are disclosed. An example medical device may include a catheter shaft. The catheter shaft may include an inner member having a distal region and a deployment sheath disposed about the inner member. A stent may be disposed between along the distal region of the inner member. A handle may be coupled to the catheter shaft. An actuation mechanism may be coupled to the handle for proximally retracting the deployment sheath. The actuation mechanism may be designed to shift relative to the handle from a pre-deployment position, along an early deployment region, and along a full deployment region. The medical device may also include a force reduction member for applying a force to the actuation mechanism while the actuation mechanism is disposed along the early deployment region.

Claims

1. A medical device, comprising:

a catheter shaft including;

an inner member having a distal region, and

a deployment sheath disposed about the inner member;

a stent disposed between along the distal region of the inner member;

a handle coupled to the catheter shaft;

an actuation mechanism coupled to the handle for proximally retracting the deployment sheath;

wherein the actuation mechanism is designed to shift relative to the handle from a pre-deployment position, along an early deployment region, and along a full deployment region; and

a force reduction member for applying a force to the actuation mechanism while the actuation mechanism is disposed along the early deployment region.

2. The medical device of claim 1, wherein the stent includes a self-expanding stent.

3. The medical device of claim 1, wherein the actuation mechanism includes a control button.

4. The medical device of claim 3, wherein the control button is rotatable relative to the handle.

5. The medical device of claim 4, wherein shifting the actuation mechanism from the pre-deployment position to the early deployment region includes rotating the control button.

6. The medical device of claim 5, wherein the control button is axially slidable along the handle.

7. The medical device of claim 6, wherein the control button is axially slidable along the full deployment region.

8. The medical device of claim 1, wherein the force reduction member includes a spring.

9. The medical device of claim 1, wherein the handle has a slot formed therein, the slot having an angled section and an axial section.

10. The medical device of claim 9, wherein the actuation mechanism is designed to move along the slot.

11. The medical device of claim 10, wherein when the actuation mechanism is shifted to the early deployment region the actuation mechanism is positioned along the angled section of the slot.

12. The medical device of claim 10, wherein when the actuation mechanism is shifted to the full deployment region the actuation mechanism is positioned along the axial section of the slot.

13. A medical device delivery system, comprising:

an inner member having a distal region;

a stent disposed along the distal region;

a deployment sheath disposed about the stent;

a handle coupled to the deployment sheath;

a control button movably disposed along the handle for proximally retracting the deployment sheath;

wherein the control button is designed to shift between a pre-deployment position and a full deployment position; and

a force reduction member for reducing the amount of force required for shifting the control button from the pre-deployment position to the full deployment position.

14. The system of claim 13, wherein shifting the control button from the pre-deployment position to the full deployment position includes rotating the control button.

15. The system of claim 13, wherein the force reduction member includes a spring.

16. The system of claim 13, wherein the handle has a slot formed therein, the slot having an angled section and an axial section.

17. The system of claim 16, wherein shifting the control button from the pre-deployment position to the full deployment position includes shifting the control button along the angled section of the slot.

18. The system of claim 16, wherein when the control button is shifted to the full deployment position, the control button is axially slidable along the axial section of the slot.

19. The system of claim 13, wherein the deployment sheath includes a pull wire, and wherein the pull wire is secured to the control button.

20. A method for delivering a self-expanding stent, the method comprising:

advancing a stent delivery system through a body lumen to a position adjacent to a target region;

wherein the stent delivery system includes;

an inner member having a distal region,

a stent disposed along the distal region,

a deployment sheath disposed about the stent,

a handle coupled to the deployment sheath,

a control button movably disposed along the handle for proximally retracting the deployment sheath,

wherein the control button is designed to shift between a pre-deployment position and a full deployment position, and

a force reduction member for reducing the amount of force required for shifting the control button from the pre-deployment position to the full deployment position;

shifting the control button from the pre-deployment position to the full deployment position; and

proximally sliding the control button along the handle.