Balloon catheter having a retractable sheath and locking mechanism

• US 10,130,798 B2
• Filed: 01/07/2016
• Issued: 11/20/2018
• Est. Priority Date: 07/15/2013
• Status: Active Grant

• Current Assignee: John P. Pigott
• Original Assignee: John P. Pigott
• Inventors: Pigott, John P.
• Primary Examiner(s): Eisenberg, Rebecca E
• Application Number:
  US14/990,477
• Publication Number:
  US 20160166810A1
• Time in Patent Office: 1,048 Days
• 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 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.

Claims

1. An intravascular balloon catheter device comprising:

an inner member;

an outer member disposed about the inner member and comprising a balloon, said balloon having a proximal end and a distal end, wherein the proximal end of the balloon is connected to the outer member and the distal end of the balloon is connected to the inner member;

a sheath disposed about the outer member and adapted for movement relative to the balloon so as to selectively expose a second portion of the balloon for inflation;

a clamp configured to selectively secure the sheath at a desired position relative to the balloon such that a first portion of the balloon remains located within the sheath; and

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

wherein the mechanical stop comprises an annulus secured to the inner surface of the sheath and a stop attached to the outer surface of the balloon;

wherein said stop and said annulus frictionally engage one another when the balloon is moved relative to the sheath;

wherein the sheath is configured to prevent the first portion of the balloon from inflating to a diameter larger than the sheath.

2. The device of claim 1 wherein:

the clamp includes a housing that is in communication with the sheath and through which the outer member extends.

3. The device of claim 2 wherein:

the clamp further comprises a first and second actuator arm that are supported within the housing and are selectively movable into engagement with the outer member.

4. The device of claim 3 wherein:

the outer member further comprises a plurality of spaced indentations; and

the first and second actuator arms are configured to sequentially engage the plurality of spaced indentations.

5. The device of claim 4 wherein:

the first and second actuator arms are biased into engagement with the outer member.

6. The device of claim 1 further comprising:

a series of radiopaque marker bands located at select intervals on the inner member.

7. The device of claim 1 further comprising:

a collar provided about an end of the sheath adapted to provide structural rigidity to the sheath.

8. The device of claim 1 wherein:

the balloon fits snugly into the sheath so as to provide a substantially watertight engagement therebetween.

9. The device of claim 1 further comprising:

a tapered insertion tip disposed about an end of the outer member configured to provide a substantially watertight engagement between said tip and said sheath when said tip is abutted to said sheath.

10. The device of claim 1 further comprising:

a drug coating provided on the outer surface of the balloon.

11. The device of claim 10 further comprising:

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