Patent US3559648A successfully refreshed from Google Patents.
EP0376451A2
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EP
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Dilatation catheter with fluted balloon
Assignee: CR Bard Inc
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Filing: 1989-11-06
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Granted: —
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Expires: 2009-11-06
Abstract
Abstract A balloon dilatation catheter (14) is provided with a fluted balloon (20) defining at least three wings (46). When the balloon collapses, it tends to assume the fluted configuration which defines a lower profile better adapted to pass through narrow channels, such as in endoscopes and guide catheters. The balloon is formed from a polymeric material in a method that involves the steps of tensioning the balloon to cause it to form flutes (44) while maintaining its interior under vacuum and subjecting the balloon, while so held, to heat and, thereafter, cooling the balloon while maintaining it in its tensioned, fluted configuration.
Inventors
- 👤 Charles E. Smith
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 03:10
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61M25/1038; A61M25/1002
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
76 words
A balloon dilatation catheter comprising: an elongate flexible shaft having at least one lumen extending therethrough from its proximal to its distal end; a dilatation balloon mounted on the distal end of the shaft and in communication with the lumen; said balloon having a collapsed configuration defined by at least three longitudinally extending flutes and alternating wings; a fitting at the proximal end of the shaft for connecting the lumen with an inflation and deflation device.
Claim 2
Dependent Claim
76 words
A balloon dilatation catheter comprising: an elongate flexible shaft having at least one lumen extending therethrough from its proximal to its distal end; a dilatation balloon mounted on the distal end of the shaft and in communication with the lumen; said balloon having a collapsed configuration defined by at least three longitudinally extending flutes and alternating wings; a fitting at the proximal end of the shaft for connecting the lumen with an inflation and deflation device.
Claim 3
Dependent Claim
38 words
A dilatation catheter as defined in claim 1 wherein the balloon, when inflated, has a central cylindrical portion, end cones at each end of the central cylindrical portion and end collars at the end of the end cones.
Claim 4
Dependent Claim
29 words
A dilatation catheter as defined in claims 1 or 2 wherein when said balloon is deflated it forms short wings foldable to a low profile about the catheter shaft.
Claim 5
Dependent Claim
14 words
A balloon dilatation catheter as defined in claim 3 wherein the balloon is inelastic.
Claim 6
Dependent Claim
17 words
A balloon dilatation catheter as defined in claim 4 wherein the balloon is formed from polyethylene terephthalate.
Claim 7
Dependent Claim
15 words
A dilatation catheter as defined in claim 3 wherein said catheter comprises an angioplasty catheter.
Claim 8
Dependent Claim
18 words
A dilatation catheter as defined in claim 6 wherein the catheter comprises a percutaneous transluminal coronary angioplasty catheter.
Claim 9
Dependent Claim
96 words
A balloon dilatation catheter as defined in claim 1 further comprising: a stiffening wire extending through the balloon and being attached to the shaft proximally of the balloon, the distal end of the wire having a catheter tip mounted thereon, the balloon being mounted at its proximal end to the flexible shaft and at its distal end to the catheter tip; the balloon being mounted on the catheter in a manner that when the balloon is not inflated, the wire will apply a longitudinal tension to the balloon, thereby tensioning the balloon in its fluted configuration.
Claim 10
Dependent Claim
27 words
A catheter as defined in claim 8 wherein the wire extends through the lumen of the shaft and is attached, at its proximal end, to the fitting.
Claim 11
Dependent Claim
67 words
A balloon for a dilatation catheter comprising: a tubular polymeric member which, when distended, has a central elongate cylindrical portion, tapered conical members on the ends of the cylindrical portion and a cylindrical collar on each end of each conical portion; said balloon being formed to collapse under the influence of reduced internal pressure into a configuration defining at least three longitudinally extending flutes and alternating wings.
Claim 12
Dependent Claim
67 words
A balloon for a dilatation catheter comprising: a tubular polymeric member which, when distended, has a central elongate cylindrical portion, tapered conical members on the ends of the cylindrical portion and a cylindrical collar on each end of each conical portion; said balloon being formed to collapse under the influence of reduced internal pressure into a configuration defining at least three longitudinally extending flutes and alternating wings.
Claim 13
Dependent Claim
14 words
A balloon as defined in claim 10 wherein the polymeric member is substantially inelastic.
Claim 14
Dependent Claim
19 words
A balloon as defined in either of claims 10 or 11 wherein the balloon is formed from polyethylene terephthalate.
Claim 15
Independent Claim
67 words
A method for forming a fluted balloon for a dilatation catheter comprising: forming a balloon from a polymeric material; tensioning the balloon by its ends, to cause it to form a plurality of at least three longitudinal flutes and alternating wings; while maintaining said tension to maintain said fluted configuration. heating the balloon; while maintaining said tension to form the flutes and wings, thereafter cooling the balloon.
Claim 16
Independent Claim
67 words
A method for forming a fluted balloon for a dilatation catheter comprising: forming a balloon from a polymeric material; tensioning the balloon by its ends, to cause it to form a plurality of at least three longitudinal flutes and alternating wings; while maintaining said tension to maintain said fluted configuration. heating the balloon; while maintaining said tension to form the flutes and wings, thereafter cooling the balloon.
Claim 17
Dependent Claim
25 words
A method as defined in claim 13 further comprising: applying negative pressure to the interior of the balloon at least during the step of tensioning.
Claim 18
Dependent Claim
22 words
A method as defined in claim 13 further comprising applying negative pressure to the interior of the balloon during the complete process.
Claim 19
Independent Claim
112 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 a balloon that collapses under the influence of vacuum to a configuration having at least three longitudinally extending flutes and alternating wings; deflating the balloon to said collapsed configuration; passing the catheter with collapsed balloon through the guide catheter and out of the distal end of the guide catheter; inflating the balloon to perform a dilatation and then deflating the balloon to said collapsed configuration; and removing the catheter through the guiding conduit while the wings of the balloon wrap about the catheter.
Claim 20
Independent Claim
112 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 a balloon that collapses under the influence of vacuum to a configuration having at least three longitudinally extending flutes and alternating wings; deflating the balloon to said collapsed configuration; passing the catheter with collapsed balloon through the guide catheter and out of the distal end of the guide catheter; inflating the balloon to perform a dilatation and then deflating the balloon to said collapsed configuration; and removing the catheter through the guiding conduit while the wings of the balloon wrap about the catheter.
Claim 21
Dependent Claim
23 words
A method as defined in claim 16 further comprising: thereafter inserting another catheter through the guiding conduit thereby to perform a catheter exchange.
Claim 22
Independent Claim
17 words
A method as defined in claims 16 or 17 wherein said guiding conduit comprises an endoscope channel.
Claim 23
Independent Claim
17 words
A method as defined in claims 16 or 17 wherein the guiding conduit comprises a guide catheter.
References Cited (Backward Citations)
No citation records indexed.
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