US5593419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixed wire dilatation catheter with distal twistable segment
Assignee: GE Aviation UK
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Filing: 1994-01-31
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Granted: 1997-01-14
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Expires: 2014-01-31
Abstract
Abstract A fixed-wire type of balloon dilatation catheter has a small diameter and can be steered to and passed to and through narrow stenoses. The catheter has a balloon at its distal end which is collapsible to a low profile to enable it to be passed through the stenosis. The catheter includes a connection between the distal end of the balloon and the supporting core wire which displays the least resistance to twisting about the core wire when the core wire is rotated with respect to the balloon and the balloon is subsequently inflated. Consequently, any twisting of the catheter about the wire will occur distally of the balloon so as not to obstruct fluid flow through the balloon.
Inventors
- 👤 Lori K. Segar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:19
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61M25/01; A61M2025/0186; A61M2025/1043; A61M2025/1079
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
In a balloon dilatation catheter having proximal and distal ends and an integral support wire and a balloon at the distal end of the catheter, the distal end of the catheter having a construction comprising: the balloon having a central cylindrical portion and proximally and distally extending tapering portions, each of the tapering portions terminating in a reduced diameter cylindrical neck portion; the support wire extending through the balloon; a separate tubular distal extension member connected integrally to and extending distally from the distal neck of the balloon, the distal end of the distal extension being attached to the support wire; the distal extension being constructed and supported to present less resistance to twisting than the balloon and the more proximal portions of the catheter.
Claim 2
Dependent Claim
125 words
In a balloon dilatation catheter having proximal and distal ends and an integral support wire and a balloon at the distal end of the catheter, the distal end of the catheter having a construction comprising: the balloon having a central cylindrical portion and proximally and distally extending tapering portions, each of the tapering portions terminating in a reduced diameter cylindrical neck portion; the support wire extending through the balloon; a separate tubular distal extension member connected integrally to and extending distally from the distal neck of the balloon, the distal end of the distal extension being attached to the support wire; the distal extension being constructed and supported to present less resistance to twisting than the balloon and the more proximal portions of the catheter.
Claim 3
Dependent Claim
42 words
A balloon dilatation catheter as defined in claim 1 wherein the balloon and distal extension member are formed from the same polymeric material, the distal extension having a wall thickness not greater than the wall thickness of any portion of the balloon.
Claim 4
Dependent Claim
32 words
A balloon dilatation catheter as defined in any of claims 1 or 3 wherein the catheter is dimensioned and adapted to be advanced into the coronary artery from a percutaneous insertion site.
Claim 5
Dependent Claim
52 words
A balloon dilatation catheter as defined in claim 1 further comprising: the distal end of the twistable extension member being attached adhesively to the support wire and having a torsionally weak, twistable segment free and unsupported between its points of connection to the support wire and the distal neck of the balloon.
Claim 6
Dependent Claim
54 words
A balloon dilatation catheter as defined in claim 1 further comprising: the wall thickness of the distal neck of the balloon being greater than the wall thickness of the central portion of the balloon, with the wall thickness of the twistable extension member being thinner than that of the distal neck of the balloon.
Claim 7
Dependent Claim
24 words
A balloon dilatation catheter as defined in claim 1 wherein the length of the distal twistable extension member is about 3 to 10 millimeters.
Claim 8
Dependent Claim
42 words
A balloon dilatation catheter as defined in claim 1 further comprising: the support wire having a distal leader segment that extends substantially beyond the distal end of the balloon and is flexible to reduce the risk of injury to the blood vessel.
Claim 9
Dependent Claim
30 words
A balloon dilatation catheter as defined in claim 7 wherein the distal leader segment comprises a coil spring to which the distal end of the twistable extension member is attached.
Claim 10
Dependent Claim
36 words
A balloon dilatation catheter as defined in claim 7 wherein the internal diameter of the distal twistable extension member is just slightly greater than the outer diameter of the leader segment to which it is bonded.
Claim 11
Dependent Claim
30 words
A balloon dilatation catheter as defined in claim 7 further comprising, a shaping ribbon disposed within the leader segment to facilitate imparting a relaxed bent shape to the leader segment.
Claim 12
Dependent Claim
14 words
A balloon dilatation catheter as defined in claim 1 wherein the balloon is blow-molded.
References Cited (Backward Citations)
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-01-14 | 2000-07-15 | 2001-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-14 | 2004-07-15 | 2005-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-14 | 2008-07-15 | 2009-01-14 | $7700.00 | Window Closed / Lapsed |