Perfusion balloon and method of use and manufacture
First Claim
1. A dilation catheter for use in medical procedures comprising:
- an elongated flexible tubular member;
a unitary multichamber balloon having an exterior surface and being disposed on said tubular member, said unitary multichamber balloon having a collapsed condition of a size allowing said balloon to be transported through a body vessel, and said balloon having an expanded condition of a size allowing said balloon to engage a body vessel wall;
a longitudinally extending septum formed integrally with said balloon and coaxial therewith, said septum being generally substantially thicker in width than said exterior surface of said balloon, said septum further including radially extending portions spaced inwardly of said exterior surface and cooperating with said balloon to define a plurality of chambers within said balloon, said septum further cooperating with said balloon to define a longitudinally extending channel exteriorly of and between adjacent chambers of said balloon when said balloon is in its expanded condition; and
means for passing fluid between said balloon chambers and said flexible tubular member to evenly vary said balloon between its collapsed and expanded conditions.
1 Assignment
0 Petitions
Accused Products
Abstract
A dilation catheter suitable for use in medical procedures is provided. The catheter includes a balloon disposed on an elongated tube. The tube is capable of passing fluid between the balloon and the tube for varying the balloon between an inflated expanded condition and a deflated collapsed condition. The balloon includes a longitudinally extending septum which cooperates with the exterior skin of the balloon to separate the balloon into a plurality of substantially equally sized chambers. The septum further cooperates with the balloon to form at least one longitudinally extending channel disposed outwardly of the exterior surface between adjacent chambers of the balloon. The channels allow blood to be perfused past the balloon when the balloon is disposed in a body vessel in its expanded condition.
278 Citations
23 Claims
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1. A dilation catheter for use in medical procedures comprising:
- an elongated flexible tubular member;
a unitary multichamber balloon having an exterior surface and being disposed on said tubular member, said unitary multichamber balloon having a collapsed condition of a size allowing said balloon to be transported through a body vessel, and said balloon having an expanded condition of a size allowing said balloon to engage a body vessel wall;
a longitudinally extending septum formed integrally with said balloon and coaxial therewith, said septum being generally substantially thicker in width than said exterior surface of said balloon, said septum further including radially extending portions spaced inwardly of said exterior surface and cooperating with said balloon to define a plurality of chambers within said balloon, said septum further cooperating with said balloon to define a longitudinally extending channel exteriorly of and between adjacent chambers of said balloon when said balloon is in its expanded condition; and
means for passing fluid between said balloon chambers and said flexible tubular member to evenly vary said balloon between its collapsed and expanded conditions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- an elongated flexible tubular member;
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12. A method of forming a dilation catheter having a unitary multichamber balloon with a longitudinally extending perfusion channel for perfusing fluid past the balloon when the balloon is disposed in a vessel, said balloon being inflatable between a collapsed condition and an expanded condition, said method comprising:
- providing an outlet die having a single continuous outlet portion, said outlet portion having at least one narrow section and one wide section;
supplying a polymer to said outlet die;
extruding a multichambered parison through said outlet die wherein the portion of the polymer extruded through said wide section defines a septum common to each chamber and the portion of the polymer extruded through the narrow section defines an exterior portion of said multichambered parison, said septum being generally substantially thicker in width than said exterior portion of said multichambered parison;
blow molding said multichambered parison to form said unitary multichamber balloon; and
connecting said balloon in seal-tight communication to the distal end of a flexible tubular member.
- providing an outlet die having a single continuous outlet portion, said outlet portion having at least one narrow section and one wide section;
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13. A dilation catheter for use in medical procedures comprising:
- an elongated flexible tubular member;
a unitary balloon disposed on said tubular member, said unitary balloon having an interior surface and an exterior surface, and said unitary balloon having a collapsed condition of a size allowing said unitary balloon to be transported through a body vessel and an expanded condition of a size allowing said exterior surface of said unitary balloon to engage a body vessel wall;
said unitary balloon further including a plurality of equally sized chambers defined by a portion of said exterior skin and a longitudinally extending septum formed integrally with said exterior skin and common to each of said chambers, said septum being generally substantially thicker in width than said exterior surface of said unitary balloon, said septum further being coaxial with said unitary balloon and cooperating with said exterior surface to define at least one longitudinally extending channel disposed outwardly of said exterior surface between adjacent chambers of said unitary balloon when said Unitary balloon is in its expanded condition; and
means for passing fluid between said chambers and said flexible tubular member to evenly vary said unitary balloon between its collapsed condition and its expanded condition. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
- an elongated flexible tubular member;
Specification