STRIPED SHEATHS FOR MEDICAL DEVICES

• US 20160317338A1
• Filed: 05/05/2016
• Published: 11/03/2016
• Est. Priority Date: 03/13/2014
• Status: Active Grant

• Current Assignee: Abbott Cardiovascular Systems Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: Abbott Cardiovascular Systems Incorporated (Abbott Laboratories Incorporated)
• Inventors: Duong, Khanh, McCoy, Jill A.
• Granted Patent: US 10,449,074 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61F 2/844 folded prior to deployment
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• CPC Class Codes: A61F 2/9524 Iris-type crimpers
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2/97 the outer sleeve being splittable
• CPC Class Codes: A61F 2002/9583 Means for holding the stent on the balloon, e.g. using protrusions, adhesives or an outer sleeve

Abstract

A sheath used to protect a medical device has one or more strips formed over a portion thereof. The medical device is a scaffold crimped to a balloon and mounted to a catheter. The sheath is two-piece, including a protecting and constraining sheath part. The strips facilitate removal of the constraining sheath from the scaffold in manner that reduces instances of damage caused by improper removal of the sheath from the medical device.

Claims

1-14. -14. (canceled)

15. A method of removing a sheath from a scaffold mounted on a catheter having a distal end, the sheath including a protecting sheath disposed over the scaffold and a constraining sheath disposed over the protecting sheath and scaffold, comprising:

pushing or pulling the constraining sheath over the protecting sheath and towards distally the catheter distal end;

wherein a distal end of the constraining sheath abuts a distal end of the protecting sheath, thereby causing a strip of the connecting sheath to deflect away from the protecting sheath.

16. The method of claim 15, wherein the deflected strip slides over the protecting sheath distal end.

17. The method of claim 15, wherein the deflected strip folds up at a location proximal of the protecting sheath distal end.

18-19. -19. (canceled)

20. A method, comprising:

using a catheter including a scaffold crimped to a balloon and a sheath disposed over the scaffold, the sheath including a protecting portion disposed over the scaffold and a constraining portion disposed over the scaffold and protecting portion, wherein a distal end of the constraining portion is proximal of the protecting portion distal end; and

removing the constraining portion from the scaffold including causing a strip of the constraining portion to fold up as the constraining portion distal end abuts the protecting portion distal end.

21. A method of making a medical device, comprising:

using a crimp head, crimping a scaffold to a balloon catheter to produce a crimped scaffold;

placing a first sheath over the crimped scaffold to reduce recoil of the crimped scaffold from the balloon; and

replacing the first sheath with a second sheath at about ½

hour after the placing of the first sheath over the crimped scaffold;

wherein the second sheath comprises a constraining portion and a protecting portion, each of which having at least one slot; and

wherein the crimped scaffold is configured for being placed within a body only after the second sheath is removed from the crimped scaffold.