US5163906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dilatation catheter and method for widening of strictures
Assignee: Schneider Europe GmbH
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Filing: 1992-03-12
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Granted: 1992-11-17
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Expires: 2012-03-12
Abstract
Abstract A dilatation catheter intended in particular for treatment of strictures in the carotid artery has at its front end a dilatation balloon, which is inserted in the folded state into the carotid artery and is inflated in order to widen the stricture. In front of the dilatation balloon a sealing balloon is arranged which serves to seal off the carotid artery downstream of the stricture, in order thereby to prevent a migration of any stricture material which may become detached during treatment, and thus to avoid the risk of an embolism. Between the dilatation balloon and the sealing balloon there is a draw-off and inlet opening through which, after widening and with the sealing balloon inflated, detached stricture material can be drawn off or washed away.
Inventors
- 👤 Ramazan-Ali Ahmadi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:39
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61M25/1011; A61M2025/1043; A61M2025/1052; A61M2025/1095
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
253 words
A method of widening a stricture in a blood vessel, the method comprising: a) providing a dilatation catheter comprising an elongated dilatation balloon arranged on a support tube and extensible up to a defined extent by means of an external pressure/section pump connected to the support tube, and a sealing balloon arranged on the support tube in the axial direction distally of and at a distance from the dilatation balloon, the wall of which sealing balloon is elastically extensible by means of an external pressure/suction pump connected to the support tube to seal off the vessel distally of the structure, with a draw-off and inlet opening being provided in the support tube distal to the dilatation balloon and proximal to the sealing balloon, said opening being of a size sufficient to accommodate detached structure material which can be drawn off to the exterior of the catheter or through which a washing fluid can be introduced; b) positioning the dilatation catheter at the site of a stricture so that the sealing balloon is situated distally of the stricture and the dilatation balloon is situated within the stricture; c) inflating the sealing balloon to an extent sufficient to seal off the vessel distally of the stricture; d) inflating the dilatation balloon to an extent sufficient to widen the stricture; e) drawing off any detached stricture material through the opening while simultaneously or immediately thereafter deflating the dilatation balloon; and f) deflating the sealing balloon and removing the dilatation catheter from the site of the stricture.
Claim 2
Independent Claim
253 words
A method of widening a stricture in a blood vessel, the method comprising: a) providing a dilatation catheter comprising an elongated dilatation balloon arranged on a support tube and extensible up to a defined extent by means of an external pressure/section pump connected to the support tube, and a sealing balloon arranged on the support tube in the axial direction distally of and at a distance from the dilatation balloon, the wall of which sealing balloon is elastically extensible by means of an external pressure/suction pump connected to the support tube to seal off the vessel distally of the structure, with a draw-off and inlet opening being provided in the support tube distal to the dilatation balloon and proximal to the sealing balloon, said opening being of a size sufficient to accommodate detached structure material which can be drawn off to the exterior of the catheter or through which a washing fluid can be introduced; b) positioning the dilatation catheter at the site of a stricture so that the sealing balloon is situated distally of the stricture and the dilatation balloon is situated within the stricture; c) inflating the sealing balloon to an extent sufficient to seal off the vessel distally of the stricture; d) inflating the dilatation balloon to an extent sufficient to widen the stricture; e) drawing off any detached stricture material through the opening while simultaneously or immediately thereafter deflating the dilatation balloon; and f) deflating the sealing balloon and removing the dilatation catheter from the site of the stricture.
Claim 3
Dependent Claim
27 words
A method of widening a stricture in a blood vessel as claimed in claim 1 wherein the sealing balloon of the dilatation catheter has a rubber-elastic wall.
Claim 4
Dependent Claim
27 words
A method of widening a stricture in a blood vessel as claimed in claim 2 wherein the sealing balloon of the dilatation catheter is made of latex.
Claim 5
Dependent Claim
32 words
A method of widening a stricture in a blood vessel as claimed in claim 1 wherein the sealing balloon of the dilatation catheter bears upon the support tube in its rest position.
Claim 6
Dependent Claim
28 words
A method of widening a stricture in a blood vessel as claimed in claim 2 wherein the sealing balloon of the dilatation catheter is spherical when freely inflated.
Claim 7
Dependent Claim
41 words
A method of widening a stricture in a blood vessel as claimed in claim 1 wherein the dilatation balloon and the sealing balloon of the dilatation catheter are inflatable independent of each other via separate channels provided in the support tube.
Claim 8
Dependent Claim
35 words
A method of widening a stricture in a blood vessel as claimed in claim 1 wherein the sealing balloon of the dilatation catheter is radially extensible beyond the defined extent of the dilatation balloon thereof.
Claim 9
Dependent Claim
37 words
A method of widening a stricture in a blood vessel as claimed in claim 1 wherein the support tube of the dilatation catheter is provided with four lumens, including a central channel provided for receiving a guidewire.
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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) | 1995-11-17 | 1996-05-18 | 1996-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-17 | 2000-05-18 | 2000-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-17 | 2004-05-18 | 2004-11-17 | $7700.00 | Window Closed / Lapsed |