BALLOON CATHETER HAVING A RETRACTABLE SHEATH AND LOCKING MECHANISM WITH BALLOON RECAPTURE ELEMENT

• US 20160354585A1
• Filed: 08/19/2016
• Published: 12/08/2016
• Est. Priority Date: 07/15/2013
• Status: Active Grant

• Current Assignee: John P. Pigott
• Original Assignee: John P. Pigott
• Inventors: Pigott, John P.
• Granted Patent: US 10,315,014 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61M 2025/105 having a balloon suitable for drug delivery, e.g. by using holes for delivery, drug coating or membranes
• CPC Class Codes: A61M 2025/1068 having means for varying the length or diameter of the deployed balloon, this variations could be caused by excess pressure
• CPC Class Codes: A61M 2025/1081 having sheaths or the like for covering the balloon but not forming a permanent part of the balloon, e.g. retractable, dissolvable or tearable sheaths
• CPC Class Codes: A61M 2025/1088 having special surface characteristics depending on material properties or added substances, e.g. for reducing friction
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00

Abstract

An intravascular balloon catheter device is disclosed having an inner member, an outer member disposed about the inner member and further comprising a balloon. A sheath is disposed about the outer member that moves relative to the balloon so as to selectively expose some or all of the balloon for inflation. A clamp may be used to selectively secure the sheath at a desired position relative to the balloon. A balloon recapture element may permit incremental adjustment to the balloon length and facilitate balloon recapture.

Claims

1. An intravascular balloon catheter device comprising:

an inner member;

an outer member disposed about the inner member and comprising a balloon;

a sheath disposed about the outer member adapted for movement relative to the balloon so as to selectively expose some or all of the balloon for inflation;

a clamp configured to selectively secure the sheath at a desired position relative to the balloon; and

a balloon recapture element.

2. The device of claim 1 wherein:

the balloon recapture element comprises a tapered edge on the distal end of the sheath.

3. The device of claim 1 wherein:

the balloon recapture element comprises a smoothed edge on the distal end of the sheath.

4. The device of claim 1 wherein:

the balloon recapture element comprises a funnel-shaped tip located on the distal end of the sheath.

5. The device of claim 1 wherein:

the balloon recapture element comprises a diametrically enlarged section located on the distal end of the sheath.

6. The device of claim 1 wherein:

the balloon recapture element comprises rifling located on the inner surface of the sheath.

7. The device of claim 6 wherein:

the balloon recapture element further comprises at least one pleat located on the outer surface of the balloon; and

the pleats are configured to mate with the rifling.

8. The device of claim 7 wherein:

the rifling is spiral shaped.

9. The device of claim 7 wherein:

the rifling extends in straight lines parallel with the center line of the sheath.

10. The device of claim 6 further comprising:

a mechanical stop configured to prevent the balloon from fully escaping the sheath.

11. The device of claim 10 wherein:

the rifling is configured to mate with the mechanical stop.

12. An intravascular balloon catheter device comprising:

an outer member;

a balloon affixed to a distal end of the outer member and configured to move between an inflated and a deflated state;

an inner member disposed within the outer member;

a sheath disposed about the outer member configured for movement relative to the balloon so as to selectively expose some or all of the balloon for inflation;

a mechanical stop configured to prevent the balloon from fully escaping the sheath; and

a balloon recapture element.

13. The device of claim 12 wherein:

the balloon recapture element comprises a tapered edge on the distal end of the sheath.

14. The device of claim 12 wherein:

the balloon recapture element comprises a smoothed edge on the distal end of the sheath.

15. The device of claim 12 wherein:

the balloon recapture element comprises a funnel-shaped tip located on the distal end of the sheath.

16. The device of claim 12 wherein:

the balloon recapture element comprises a diametrically enlarged section located on the distal end of the sheath.

17. The device of claim 12 wherein:

the balloon recapture element comprises rifling located on the inner surface of the sheath.

18. The device of claim 17 wherein:

the balloon recapture element further comprises at least one pleat located on the outer surface of the balloon; and

the pleats are configured to mate with the rifling.

19. The device of claim 12 wherein:

the rifling is configured to mate with the mechanical stop.

20. An intravascular balloon catheter device comprising:

an inner member;

an outer member disposed about the inner member and comprising a balloon having a plurality of pleats located on the outer surface thereof;

a sheath disposed about the outer member adapted for movement relative to the balloon so as to selectively expose some or all of the balloon for inflation, wherein said sheath comprises rifling on the inner surface of said sheath configured to mate with the pleats, and a funnel-shaped tip on the distal end of the sheath, said funnel-shaped tip having a smoothed or tapered distal edge configured to facilitate resheathing of the balloon;

a clamp configured to selectively secure the sheath at a desired position relative to the balloon;

a tapered insertion tip disposed about an end of the balloon configured to provide a substantially watertight seal between said tip and said sheath when said tip is abutted to said sheath;

a drug coating provided on the outer surface of the balloon; and

a lubricious coating provided between the inner surface of the sheath and the outer surface of the balloon.