US5383890A — Low-profile single-lumen perfusion balloon cathet…

Claim 1

Independent Claim 96 words

A perfusion balloon catheter comprising a catheter shaft which at a distal end portion thereof carries an expansible balloon section, a perfusion conduit exterior to the balloon section and defining proximal and distal perfusion openings respectively disposed relative to said balloon section and communicating with one another via a passage of said perfusion conduit, and a support member for supporting said perfusion conduit in opposition to inflation pressure from said balloon section and maintaining said perfusion conduit passage open to permit perfusion blood flow past said balloon while the latter is forcefully inflated with pressurized fluid.

Claim 2

Dependent Claim 96 words

A perfusion balloon catheter comprising a catheter shaft which at a distal end portion thereof carries an expansible balloon section, a perfusion conduit exterior to the balloon section and defining proximal and distal perfusion openings respectively disposed relative to said balloon section and communicating with one another via a passage of said perfusion conduit, and a support member for supporting said perfusion conduit in opposition to inflation pressure from said balloon section and maintaining said perfusion conduit passage open to permit perfusion blood flow past said balloon while the latter is forcefully inflated with pressurized fluid.

Claim 3

Dependent Claim 19 words

The catheter of claim 1 further including an inflation lumen communicating pressurized inflation fluid to said expansible balloon section.

Claim 4

Dependent Claim 17 words

The catheter of claim 2 further including a guide wire assembly movably disposed in said inflation lumen.

Claim 5

Dependent Claim 27 words

The catheter of claim 3 wherein said guide wire assembly includes means for valvingly cooperating with said catheter to contain pressurized fluid within said expansible balloon section.

Claim 6

Dependent Claim 49 words

The catheter of claim 4 wherein said catheter includes a seal section defining a distal opening from said balloon section, said guide wire assembly valving means including a seal collar sealingly receivable in a first position in said seal section to contain said pressurized fluid within said balloon section.

Claim 7

Dependent Claim 25 words

The catheter of claim 5 wherein said seal collar including a collar member relatively rotatably carried on a shaft portion of said guide wire assembly.

Claim 8

Dependent Claim 14 words

The catheter of claim 6 wherein said collar member is formed of polymeric material.

Claim 9

Dependent Claim 23 words

The catheter of claim 7 wherein said polymeric material is selected from the group including PVC, polyamide, polyimide, and fluoropolymers such as polytetrafluoroethylene.

Claim 10

Dependent Claim 14 words

The catheter of claim 1 wherein said support member includes a helical coil member.

Claim 11

Dependent Claim 17 words

The catheter of claim 9 wherein said helical coil member includes a helical coil of metallic wire.

Claim 12

Dependent Claim 16 words

The catheter of claim 10 wherein said helical coil of metallic wire is of open-coil configuration.

Claim 13

Dependent Claim 27 words

The catheter of claim 1 further comprising said perfusion conduit defining one of a proximal and a distal perfusion port opening outwardly from said perfusion conduit passage.

Claim 14

Dependent Claim 26 words

The catheter of claim 12 wherein said perfusion conduit includes both a proximal and a distal perfusion port opening outwardly from said passage on said conduit.

Claim 15

Dependent Claim 18 words

The catheter of claim 1 further including a mono-rail guide wire assembly slidably received through said perfusion conduit.

Claim 16

Dependent Claim 16 words

The catheter of claim 14 wherein said balloon section is closed at a distal end thereof.

Claim 17

Independent Claim 158 words

A method of providing perfusion blood flow past a dilatation balloon of a medical treatment catheter when said dilatation balloon is inflated to dilate a circulatory pathway, said method including the steps of: providing a medical treatment catheter comprising an elongate catheter shaft defining an inflation lumen, said catheter shaft at a distal end portion thereof carrying an inflatable dilatation balloon in fluid communication with said inflation lumen; providing a perfusion conduit exterior to said dilatation balloon and defining openings proximal and distal of the dilatation balloon which communicate fluidly with one another via a passage of said perfusion conduit; providing a support member for supporting said perfusion conduit in opposition to inflation pressure in said dilatation balloon so that said passage of said perfusion conduit remains open when said dilatation balloon is forcefully inflated and allows perfusion blood to flow past said balloon; and allowing blood through said perfusion conduit when said dilatation balloon is forcefully inflated.

Claim 18

Independent Claim 158 words

A method of providing perfusion blood flow past a dilatation balloon of a medical treatment catheter when said dilatation balloon is inflated to dilate a circulatory pathway, said method including the steps of: providing a medical treatment catheter comprising an elongate catheter shaft defining an inflation lumen, said catheter shaft at a distal end portion thereof carrying an inflatable dilatation balloon in fluid communication with said inflation lumen; providing a perfusion conduit exterior to said dilatation balloon and defining openings proximal and distal of the dilatation balloon which communicate fluidly with one another via a passage of said perfusion conduit; providing a support member for supporting said perfusion conduit in opposition to inflation pressure in said dilatation balloon so that said passage of said perfusion conduit remains open when said dilatation balloon is forcefully inflated and allows perfusion blood to flow past said balloon; and allowing blood through said perfusion conduit when said dilatation balloon is forcefully inflated.

Claim 19

Dependent Claim 45 words

The method of claim 16 wherein said step of providing a support member for supporting said perfusion conduit includes the steps of providing a helical coil member, and inserting said helical coil member into said passage of said perfusion conduit congruently with said dilatation balloon.

Claim 20

Dependent Claim 99 words

The method of claim 17 wherein said step of inserting said helical coil member into said passage includes the steps of constraining the opposite ends of said helical coil member, twisting said opposite ends to reduce the diameter of said helical coil member to a size less than its unconstrained diameter, inserting said constrained and twisted helical coil member into said passage, allowing said helical coil member to return toward its unconstrained diameter, and employing said return of said helical coil member toward its unconstrained diameter to cause an interference fit of said helical coil member within said passage.

Claim 21

Dependent Claim 114 words

A low-profile single-lumen balloon dilatation perfusion catheter comprising: an elongate single-lumen catheter shaft having an inflation lumen extending there along; a balloon section carried on said catheter shaft in a distal end portion thereof and in fluid communication with said inflation lumen; a perfusion conduit member carried on said catheter shaft at said distal end portion thereof and exterior to said balloon section to defining proximal and distal perfusion openings communicating with one another via a passage of said perfusion conduit member; and a support member for supporting said perfusion conduit in opposition to inflation pressure expanding said balloon section to thereby maintain said passage open for perfusion blood flow past said balloon section.

Claim 22

Dependent Claim 114 words

A low-profile single-lumen balloon dilatation perfusion catheter comprising: an elongate single-lumen catheter shaft having an inflation lumen extending there along; a balloon section carried on said catheter shaft in a distal end portion thereof and in fluid communication with said inflation lumen; a perfusion conduit member carried on said catheter shaft at said distal end portion thereof and exterior to said balloon section to defining proximal and distal perfusion openings communicating with one another via a passage of said perfusion conduit member; and a support member for supporting said perfusion conduit in opposition to inflation pressure expanding said balloon section to thereby maintain said passage open for perfusion blood flow past said balloon section.

Claim 23

Dependent Claim 20 words

The perfusion catheter of claim 19 further including a guide wire assembly for guiding said catheter along a vascular pathway.

Claim 24

Dependent Claim 18 words

The perfusion catheter of claim 20 wherein said guide wire assembly is received slidably through said perfusion conduit.

Claim 25

Dependent Claim 43 words

The perfusion catheter of claim 20 wherein said guide wire assembly is received slidably in said inflation lumen, and said catheter and guide wire assembly include valving means for sealingly cooperating with one another to maintain pressurized inflation fluid in said balloon section.

Claim 26

Dependent Claim 142 words

A perfusion balloon catheter comprising: a catheter shaft which at a distal end portion thereof carries an expansible balloon section; an inflation lumen communicating pressurized inflation fluid to said expansible balloon section; a guide wire assembly movably disposed in said inflation lumen; a perfusion conduit traversing the balloon section and defining proximal and distal perfusion openings respectively disposed relative to said balloon section and communicating with one another via a passage of said perfusion conduit; and a support member for supporting said perfusion conduit in opposition to inflation pressure from said balloon section, whereby said support member maintains said perfusion conduit passage open to permit perfusion blood flow past said balloon while the latter is forcefully inflated with pressurized fluid; wherein said guide wire assembly includes means for valvingly cooperating with said catheter to contain pressurized fluid within said expansible balloon section.

Claim 27

Dependent Claim 142 words

A perfusion balloon catheter comprising: a catheter shaft which at a distal end portion thereof carries an expansible balloon section; an inflation lumen communicating pressurized inflation fluid to said expansible balloon section; a guide wire assembly movably disposed in said inflation lumen; a perfusion conduit traversing the balloon section and defining proximal and distal perfusion openings respectively disposed relative to said balloon section and communicating with one another via a passage of said perfusion conduit; and a support member for supporting said perfusion conduit in opposition to inflation pressure from said balloon section, whereby said support member maintains said perfusion conduit passage open to permit perfusion blood flow past said balloon while the latter is forcefully inflated with pressurized fluid; wherein said guide wire assembly includes means for valvingly cooperating with said catheter to contain pressurized fluid within said expansible balloon section.

Claim 28

Dependent Claim 49 words

The catheter of claim 23 wherein said catheter includes a seal section defining a distal opening from said balloon section, said guide wire assembly valving means including a seal collar sealingly receivable in a first position in said seal section to contain said pressurized fluid within said balloon section.

Claim 29

Dependent Claim 25 words

The catheter of claim 24 wherein said seal collar includes a collar member relatively rotatably carried on a shaft portion of said guide wire assembly.

Claim 30

Dependent Claim 14 words

The catheter of claim 25 wherein said collar member is formed of polymeric material.

Claim 31

Dependent Claim 23 words

The catheter of claim 26 wherein said polymeric material is selected from the group including PVC, polyamide, polyimide, and fluoropolymers such as polytetrafluoroethylene.

Claim 32

Dependent Claim 157 words

A low-profile single-lumen balloon dilatation perfusion catheter comprising: an elongate single-lumen catheter shaft having an inflation lumen extending there along; a balloon section carried on said catheter shaft in a distal end portion thereof and in fluid communication with said inflation lumen; a perfusion conduit member carried on said catheter shaft at said distal end portion thereof and outwardly traversing said balloon section to define proximal and distal perfusion openings communicating with one another via a passage of said perfusion conduit member; a support member for supporting said perfusion conduit in opposition to inflation pressure expanding said balloon section to thereby maintain said passage open for perfusion blood flow past said balloon section; and a guide wire assembly received slidably through said perfusion conduit for guiding said catheter along a vascular pathway; wherein said catheter and guide wire assembly include valving means for sealingly cooperating with one another to maintain pressurized inflation fluid in said balloon section.

Claim 33

Dependent Claim 157 words

A low-profile single-lumen balloon dilatation perfusion catheter comprising: an elongate single-lumen catheter shaft having an inflation lumen extending there along; a balloon section carried on said catheter shaft in a distal end portion thereof and in fluid communication with said inflation lumen; a perfusion conduit member carried on said catheter shaft at said distal end portion thereof and outwardly traversing said balloon section to define proximal and distal perfusion openings communicating with one another via a passage of said perfusion conduit member; a support member for supporting said perfusion conduit in opposition to inflation pressure expanding said balloon section to thereby maintain said passage open for perfusion blood flow past said balloon section; and a guide wire assembly received slidably through said perfusion conduit for guiding said catheter along a vascular pathway; wherein said catheter and guide wire assembly include valving means for sealingly cooperating with one another to maintain pressurized inflation fluid in said balloon section.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1998-01-23	1998-07-25	1999-01-24	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2002-01-23	2002-07-25	2003-01-24	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2006-01-23	2006-07-25	2007-01-24	$7700.00	Window Closed / Lapsed

Low-profile single-lumen perfusion balloon catheter

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