Patent US4772269A successfully refreshed from Google Patents.
US4772269A
Expired / Lapsed
US
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Peritoneal dialysis catheter
Assignee: University of Missouri-Columbia
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Filing: 1987-02-11
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Granted: 1988-09-20
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Expires: 2007-02-11
Abstract
Abstract A peritoneal catheter comprises a flexible catheter tube carrying porous cuff means to facilitate permanent securance of the catheter to the abdominal wall. The catheter tube defines, in its natural, unstressed condition, a bent segment adjacent the porous cuff means. This permits the catheter to be mounted in a tunnel formed through the abdominal wall in relatively unstressed configuration with both ends pointing downwardly.
Inventors
- 👤 Zbylut J. Twardowski
- 👤 Karl D. Nolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:24
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/28; A61M1/285
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
137 words
A peritoneal catheter which comprises a flexible catheter tube having a proximal and a distal end portion, said distal end portion defining flow port means for fluid communication between the bore of the catheter tube and the peritoneal cavity, said catheter carrying spaced porous cuff means to facilitate permanent securance of the catheter to the abdominal wall, the improvement comprising, in combination: said catheter tube defining, in its natural, unstressed condition, a bent segment forming an arc in a range of 100° to 180° between said porous cuff means, said bent segment, in use, extending in a tunnel formed through the abdominal wall in its relatively unstressed configuration to direct the distal end portion toward a caudel direction within the peritoneal cavity of the patient while the proximal end also projects, when viewed by an onlooker, downwardly.
Claim 2
Dependent Claim
137 words
A peritoneal catheter which comprises a flexible catheter tube having a proximal and a distal end portion, said distal end portion defining flow port means for fluid communication between the bore of the catheter tube and the peritoneal cavity, said catheter carrying spaced porous cuff means to facilitate permanent securance of the catheter to the abdominal wall, the improvement comprising, in combination: said catheter tube defining, in its natural, unstressed condition, a bent segment forming an arc in a range of 100° to 180° between said porous cuff means, said bent segment, in use, extending in a tunnel formed through the abdominal wall in its relatively unstressed configuration to direct the distal end portion toward a caudel direction within the peritoneal cavity of the patient while the proximal end also projects, when viewed by an onlooker, downwardly.
Claim 3
Dependent Claim
24 words
The peritoneal catheter of claim 1 in which said proximal and distal end portions form an angle to each other that is supplementary thereto.
Claim 4
Dependent Claim
19 words
The peritoneal catheter of claim 2 in which said arch is defined in a range of 120° to 170°.
Claim 5
Dependent Claim
17 words
The peritoneal catheter of claim 1 in which said flexible catheter tube is made of silicone rubber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |