US5501667A — Perfusion balloon and method of use and manufactu…

Claim 1

Independent Claim 178 words

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.

Claim 2

Dependent Claim 178 words

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.

Claim 3

Dependent Claim 24 words

The dilation catheter of claim 1, wherein said multichamber balloon includes a first chamber and a second chamber separated by said longitudinally extending septum.

Claim 4

Dependent Claim 14 words

The dilation catheter of claim 1, wherein said plurality of chambers are equally sized.

Claim 5

Dependent Claim 27 words

The dilation catheter of claim 1, wherein said flexible tubular member includes a first lumen for transporting a fluid and a second lumen for receiving a guidewire.

Claim 6

Dependent Claim 27 words

The dilation catheter of claim 1, wherein said flexible tubular member includes an inner lumen for receiving a guidewire and an outer lumen for transporting a fluid.

Claim 7

Dependent Claim 21 words

The dilation catheter of claim 1, wherein said flexible tube is coaxial with the longitudinal axis of said longitudinally extending septum.

Claim 8

Dependent Claim 37 words

The dilation catheter of claim 1, wherein said means for passing fluid between said balloon member and said flexible tubing includes at least one pathway between said flexible tubular member and each chamber of said multichamber balloon.

Claim 9

Dependent Claim 43 words

The dilation catheter of claim 4, wherein the proximal end of said balloon is in seal-tight communication with a first tube defining said first lumen and the distal end of said balloon is sealingly connected to a second tube defining said second lumen.

Claim 10

Dependent Claim 27 words

The dilation catheter of claim 1, further including a membrane disposed over said longitudinally extending channel, said membrane sealingly connected to the exterior surface of the balloon.

Claim 11

Dependent Claim 26 words

The dilation catheter of claim 1, wherein said balloon dimensions increase approximately on the order of three times between its collapsed condition and its expanded condition.

Claim 12

Dependent Claim 24 words

The dilation catheter of claim 1, wherein said longitudinally extending septum is a common element to each of the chambers of said multichambered balloon.

Claim 13

Independent Claim 165 words

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.

Claim 14

Independent Claim 165 words

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.

Claim 15

Dependent Claim 201 words

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.

Claim 16

Dependent Claim 201 words

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.

Claim 17

Dependent Claim 27 words

The dilation catheter of claim 13, wherein said flexible tubular member includes a first lumen for transporting a fluid and a second lumen for receiving a guidewire.

Claim 18

Dependent Claim 27 words

The dilation catheter of claim 13, wherein said flexible tubular member includes an inner lumen for receiving a guidewire and an outer lumen for transporting a fluid.

Claim 19

Dependent Claim 17 words

The dilation catheter of claim 13, wherein said flexible tube is coaxial with said longitudinally extending septum.

Claim 20

Dependent Claim 37 words

The dilation catheter of claim 13, wherein said means for passing fluid between said balloon member and said flexible tubing includes at least one pathway between said flexible tubular member and each chamber of said multichamber balloon.

Claim 21

Dependent Claim 43 words

The dilation catheter of claim 13, wherein the proximal end of said balloon is in seal-tight communication with a first tube defining said first lumen and the distal end of said balloon is sealingly connected to a second tube defining said second lumen.

Claim 22

Dependent Claim 27 words

The dilation catheter of claim 13, further including a membrane disposed over said longitudinally extending channel, said membrane sealingly connected to the exterior surface of the balloon.

Claim 23

Dependent Claim 14 words

The dilation catheter of claim 13, further including a plurality of longitudinally extending channels.

Claim 24

Dependent Claim 19 words

The dilation catheter of claim 13, wherein said septum includes radially extending branches for forming said equally sized chambers.

Claim 25

Dependent Claim 18 words

The dilation catheter of claim 21, wherein said radially extending branches traverse the longitudinal extent of said balloon.

Claim 26

Dependent Claim 34 words

The dilation catheter of claim 22, wherein said radially extending branches cooperate with said exterior skin to define said longitudinally extending channel disposed outwardly of said exterior surface between adjacent chambers of said balloon.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1999-03-26	1999-09-25	2000-03-26	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2003-03-26	2003-09-25	2004-03-26	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2007-03-26	2007-09-25	2008-03-26	$7700.00	Window Closed / Lapsed

Perfusion balloon and method of use and manufacture

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