US5464398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter
Assignee: Individual
•
Filing: 1991-04-11
•
Granted: 1995-11-07
•
Expires: 2011-04-11
Abstract
Abstract A catheter (1, 18) is essentially rigid in cross-section in the peripheral region, and has at least two lumina (3, 4, 19, 20), which are mutually separated by a wall (2, 21) which can be expanded and/or deformed in the transverse plane. The flow cross-sections of the lumina change owing to the deformation of the separating wall (2, 21), depending on the prevailing differential pressure. If drugs are introduced through the lumina one after another, then there is used, in the lumen, an over pressure in relation to the other lumen or lumina, which causes a deformation of the separating wall (2, 21), and hence a reduction in the resistance to flow. The catheter (24) can, therefore, be given a smaller cross-section than that of the prior art multi-lumen catheters (32, 33, 34), resulting in easier manipulation by the doctor and less risk for the patient.
Inventors
- 👤 Hans Haindl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:11
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0021; A61M25/0023; A61M25/0026; A61M2025/0025; A61M2025/0035; A61M25/003
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
90 words
A catheter comprises an external tube which has a relatively thick wall and which is in part, essentially rigid in cross-section, and which comprises at least two lumina which are separated from one another by a separating wall, characterized in that the catheter in its circumferential area is rigid but is flexible over its length, and, the separating wall is relatively thin and is very easy to deform and move in a direction transverse to the length of the catheter, and that said lumina are each open at both ends.
Claim 2
Dependent Claim
90 words
A catheter comprises an external tube which has a relatively thick wall and which is in part, essentially rigid in cross-section, and which comprises at least two lumina which are separated from one another by a separating wall, characterized in that the catheter in its circumferential area is rigid but is flexible over its length, and, the separating wall is relatively thin and is very easy to deform and move in a direction transverse to the length of the catheter, and that said lumina are each open at both ends.
Claim 3
Dependent Claim
39 words
A catheter in accordance with claim 1, characterized in that, the separating wall forms an internal tube, which is disposed inside an external tube which forms the circumferential area of the catheter which is essentially rigid in its cross-section.
Claim 4
Dependent Claim
20 words
A catheter in accordance with claim 2, characterized in that, the internal tube is disposed loosely in the external tube.
Claim 5
Dependent Claim
25 words
A catheter in accordance with claim 2, characterized in that, the internal tube is connected, over a portion of its circumference, with the external tube.
Claim 6
Dependent Claim
19 words
A catheter in accordance with claim 2, characterized in that, several internal tubes are positioned in the external tube.
Claim 7
Dependent Claim
36 words
A catheter in accordance with claim 1, characterized in that, said separating wall is disposed in an essentially round tube forming said circumferential area which is rigid in cross-section, and which is longer than said cross-section.
Claim 8
Dependent Claim
37 words
A catheter in accordance with claim 6, characterized in that, the separating wall is long enough that it can be applied to the one side or the other up to an adjacent internal wall of a lumen.
Claim 9
Dependent Claim
36 words
A catheter in accordance with claim 1, characterized in that, the separating wall has at least three partial separating walls which proceed in a star-like pattern to one another, and thus form at least three lumina.
Claim 10
Dependent Claim
55 words
A catheter in accordance with claim 2, characterized in that, the internal tube is tightly connected, on the distal end of the catheter, with an external end of the external tube, being tapered preferably having a tapering, and that, a through-flow aperture is located, within the external tube, at a distance from the distal end.
Claim 11
Dependent Claim
63 words
A catheter in accordance with claim 6 or 8, characterized in that, the lumina on the distal end of the catheter are sealed into one, and that the sealed lumen or the sealed lumina has, or have, at a distance from the distal end of the catheter preferably at different distances from the same, through-flow apertures which proceed through the external circumferential area.
Claim 12
Dependent Claim
37 words
A catheter in accordance with claim 1, characterized in that, the lumina at the proximal end of the catheter are enlarged, and are provided, in this area, with a connecting piece for the connection of the lumina.
Claim 13
Dependent Claim
63 words
A catheter in accordance with claim 2, characterized in that, at the proximal end of the catheter, the internal tube projects beyond the external tube; and, both ends of the tubes are tightly received in coaxial recesses of a connecting piece, whereby an annular space is located, behind each of the ends of the tubes, said space being operatively connected to a connection.
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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) | 1998-11-06 | 1999-05-08 | 1999-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-06 | 2003-05-08 | 2003-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-06 | 2007-05-08 | 2007-11-07 | $7700.00 | Window Closed / Lapsed |