US5318587A — Pleated balloon dilatation catheter and method of…

Claim 1

Independent Claim 164 words

An angioplasty dilation catheter comprising: an elongate flexible shaft having at least one lumen extending therethrough from its proximal to its distal end; an imperforate, inelastic angioplasty dilatation balloon mounted on the distal end of the shaft and in fluid communication with the lumen, the balloon being formed from an extruded polymeric tube having at least three circumferentially spaced longitudinally extending extruded fold lines of less wall thickness than the remainder of the tube; a fitting for connecting the lumen with an inflation and deflation device; and the balloon being adapted for inflation and deflation between an expanded diameter and a collapsed configuration having a reduced cross-sectional profile to facilitate passage of the balloon through a passageway in a body lumen; the fold lines being constructed so that when the balloon is caused to collapse, the fold lines will be drawn radially inwardly thereby to define radially inward folds and the portions of the balloon between the fold lines will define radially outward folds.

Claim 2

Dependent Claim 164 words

An angioplasty dilation catheter comprising: an elongate flexible shaft having at least one lumen extending therethrough from its proximal to its distal end; an imperforate, inelastic angioplasty dilatation balloon mounted on the distal end of the shaft and in fluid communication with the lumen, the balloon being formed from an extruded polymeric tube having at least three circumferentially spaced longitudinally extending extruded fold lines of less wall thickness than the remainder of the tube; a fitting for connecting the lumen with an inflation and deflation device; and the balloon being adapted for inflation and deflation between an expanded diameter and a collapsed configuration having a reduced cross-sectional profile to facilitate passage of the balloon through a passageway in a body lumen; the fold lines being constructed so that when the balloon is caused to collapse, the fold lines will be drawn radially inwardly thereby to define radially inward folds and the portions of the balloon between the fold lines will define radially outward folds.

Claim 3

Dependent Claim 21 words

A dilatation catheter as defined in claim 1 wherein the balloon, when deflated, forms at least three pleats about the shaft.

Claim 4

Dependent Claim 17 words

A balloon dilatation catheter as defined in claim 1 wherein the balloon is formed from polyethylene terephthalate.

Claim 5

Dependent Claim 16 words

A balloon dilatation catheter as defined in claim 1 wherein the balloon is formed from polyethylene.

Claim 6

Dependent Claim 17 words

A balloon dilatation catheter as defined in claim 1 wherein the balloon is formed from polyvinyl chloride.

Claim 7

Dependent Claim 18 words

A dilatation catheter as defined in claim 1 wherein the catheter comprises a percutaneous transluminal coronary angioplasty catheter.

Claim 8

Dependent Claim 138 words

A balloon for an angioplasty dilatation catheter comprising: the balloon being formed by radial expansion of an extruded tubular polymeric member having an inperforate wall and having at least three extruded fold lines of reduced wall thickness extending longitudinally of the tube; the balloon being formed to collapse under the influence of reduced internal pressure into a configuration defined by at least three longitudinally extending pleats and alternating wings, the extruded fold lines being constructed so that when the balloon is caused to collapse, the fold lines will define radially inwardly disposed folds and the regions between the fold lines will define radially outwardly disposed folds; and the wings being flexible and being bendable as to be capable of wrapping about a longitudinally extending dimension of the balloon, thereby to define a smaller cross-sectional profile for the balloon.

Claim 9

Dependent Claim 138 words

A balloon for an angioplasty dilatation catheter comprising: the balloon being formed by radial expansion of an extruded tubular polymeric member having an inperforate wall and having at least three extruded fold lines of reduced wall thickness extending longitudinally of the tube; the balloon being formed to collapse under the influence of reduced internal pressure into a configuration defined by at least three longitudinally extending pleats and alternating wings, the extruded fold lines being constructed so that when the balloon is caused to collapse, the fold lines will define radially inwardly disposed folds and the regions between the fold lines will define radially outwardly disposed folds; and the wings being flexible and being bendable as to be capable of wrapping about a longitudinally extending dimension of the balloon, thereby to define a smaller cross-sectional profile for the balloon.

Claim 10

Independent Claim 170 words

A method for performing a dilatation procedure in a lumen of a patient comprising: inserting a guiding conduit to a region to be dilated; providing a dilatation catheter having an imperforate, inelastic angioplasty dilatation balloon formed from an extruded polymeric tube having at least three circumferentially spaced longitudinally extending extruded fold lines of less wall thickness than the remainder of the tube such that said balloon collapses under the influence of negative pressure extending pleats and alternating wings; deflating the balloon to the collapsed configuration to cause the fold lines to be drawn radially inwardly thereby to define radially inward folds with the portions of the balloon between the fold lines defining radially outward folds; passing the catheter with the collapsed balloon through the guide conduit and out the distal end of the guide conduit; inflating the balloon to perform a dilatation and then deflating the balloon to the collapsed configuration; and removing the catheter through the guiding conduit while the wings of the balloon ar wrapped about the catheter.

Claim 11

Independent Claim 170 words

A method for performing a dilatation procedure in a lumen of a patient comprising: inserting a guiding conduit to a region to be dilated; providing a dilatation catheter having an imperforate, inelastic angioplasty dilatation balloon formed from an extruded polymeric tube having at least three circumferentially spaced longitudinally extending extruded fold lines of less wall thickness than the remainder of the tube such that said balloon collapses under the influence of negative pressure extending pleats and alternating wings; deflating the balloon to the collapsed configuration to cause the fold lines to be drawn radially inwardly thereby to define radially inward folds with the portions of the balloon between the fold lines defining radially outward folds; passing the catheter with the collapsed balloon through the guide conduit and out the distal end of the guide conduit; inflating the balloon to perform a dilatation and then deflating the balloon to the collapsed configuration; and removing the catheter through the guiding conduit while the wings of the balloon ar wrapped about the catheter.

Claim 12

Dependent Claim 152 words

A dilatation catheter comprising: an elongate flexible shaft having at least one lumen extending therethrough from its proximal to its distal end; an imperforate dilatation balloon mounted on the distal end of the shaft and in fluid communication with the lumen, the balloon having at least one segment of a less wall thickness than the remainder of the balloon, the balloon being constructed to be inflated to a pressure sufficient to perform a dilatation, said segment of less wall thickness being defined by a longitudinally extending line along the balloon wall whereby the balloon will burst along said longitudinally extending line; and a fitting for connecting the lumen with an inflation and deflation device; the wall thickness in the reduced wall thickness providing a weakened area of the balloon adapted to burst when the balloon is subjected to a pressure that exceeds a predetermined maximum pressure no greater than about 18 bars.

Claim 13

Dependent Claim 152 words

A dilatation catheter comprising: an elongate flexible shaft having at least one lumen extending therethrough from its proximal to its distal end; an imperforate dilatation balloon mounted on the distal end of the shaft and in fluid communication with the lumen, the balloon having at least one segment of a less wall thickness than the remainder of the balloon, the balloon being constructed to be inflated to a pressure sufficient to perform a dilatation, said segment of less wall thickness being defined by a longitudinally extending line along the balloon wall whereby the balloon will burst along said longitudinally extending line; and a fitting for connecting the lumen with an inflation and deflation device; the wall thickness in the reduced wall thickness providing a weakened area of the balloon adapted to burst when the balloon is subjected to a pressure that exceeds a predetermined maximum pressure no greater than about 18 bars.

Claim 14

Dependent Claim 21 words

A dilatation catheter as defined in claim 9 wherein said pressure for performing a dilatation comprises at least about 75 psi.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1997-06-06	1997-12-06	1998-06-07	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2001-06-06	2001-12-06	2002-06-07	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2005-06-06	2005-12-06	2006-06-07	$7700.00	Window Closed / Lapsed

Pleated balloon dilatation catheter and method of use

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag