US3902492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter
Assignee: Individual
•
Filing: 1974-05-14
•
Granted: 1975-09-02
•
Expires: 1994-05-14
Abstract
Abstract A catheter for the continuous irrigation of the bladder which has a drainage tube for the removal of fluid from the bladder, an auxiliary axial bore extending through the wall of the drainage tube, and an irrigation tube extending from the axial bore beyond the tip of the catheter. The irrigation tube has a plurality of radial discharge outlets. During use, the irrigation tube curves around the bladder; fluid passes through the irrigation tube to provide a discharge spray and a turbulent flow of liquid in the bladder. This provides for a peripheral bladder irrigation which is an improvement over a single discharge point near the entry of a catheter into a bladder. The catheter also preferably has a second axial bore in its wall which terminates in an opening beneath a sheath of expandable material which can be inflated by fluid applied under pressure through the second axial bore, to secure the catheter in place.
Inventors
- 👤 Roger Malcolm Greenhalgh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:05
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M1/00; A61M1/84; A61M1/85
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
106 words
A catheter for continuous irrigation of a body cavity, having a drainage tube for the removal of fluid from said body cavity, an auxiliary passageway extending along the catheter and terminating at or towards the tip of the catheter and a flexible irrigation tube extending from said auxiliary passageway beyond the tip of the catheter for a length of from about 4 to 6 inches and having a plurality of radial discharge outlets at least towards its free end wherein the flexibility and length of said irrigation tube are adapted to facilitate its curving around the wall of said body cavity and providing peripheral irrigation thereof.
Claim 2
Dependent Claim
106 words
A catheter for continuous irrigation of a body cavity, having a drainage tube for the removal of fluid from said body cavity, an auxiliary passageway extending along the catheter and terminating at or towards the tip of the catheter and a flexible irrigation tube extending from said auxiliary passageway beyond the tip of the catheter for a length of from about 4 to 6 inches and having a plurality of radial discharge outlets at least towards its free end wherein the flexibility and length of said irrigation tube are adapted to facilitate its curving around the wall of said body cavity and providing peripheral irrigation thereof.
Claim 3
Dependent Claim
21 words
The catheter of claim 1 wherein said auxiliary passageway is an axial bore extending through the wall of said drainage tube.
Claim 4
Dependent Claim
21 words
The catheter of claim 2 wherein the discharge outlets of the irrigation tube are radially distributed along the whole length thereof.
Claim 5
Dependent Claim
21 words
The catheter of claim 1 which is provided at its tip with one or more radial outlets from said drainage tube.
Claim 6
Dependent Claim
39 words
The catheter of claim 1 which has a second auxiliary passageway, said second auxiliary passageway terminating in an opening beneath a sheath of expandable material which can be inflated by fluid applied under pressure through said second auxiliary passageway.
Claim 7
Dependent Claim
22 words
The catheter of claim 5 wherein said second auxiliary passageway is an axial bore extending through the wall of said drainage tube.
Claim 8
Dependent Claim
10 words
The catheter of claim 1 manufactured from flexible polyvinyl chloride.
Claim 9
Dependent Claim
13 words
The catheter of claim 5 wherein the sheath is made from rubber latex.
Claim 10
Dependent Claim
16 words
The catheter of claim 1 having an external diameter of from 20 to 24 French gauge.
Claim 11
Dependent Claim
18 words
The catheter of claim 1 wherein the irrigation tube has an external diameter of approximately 8 French gauge.
Claim 12
Dependent Claim
27 words
The catheter of claim 1 wherein said irrigation tube is adapted to fit into said drainage tube to facilitate insertion of the catheter into said body cavity.
Claim 13
Dependent Claim
23 words
The catheter of claim 1 wherein the external diameter of said irrigation tube is smaller than the internal diameter of said drainage tube.
Claim 14
Dependent Claim
17 words
The catheter of claim 1 wherein said irrigation tube is an integral part of said catheter body.
Claim 15
Dependent Claim
33 words
The catheter of claim 1 wherein the flexibility and size of said irrigation tube are adapted to facilitate placement of said irrigation tube into said drainage tube for insertion into said body cavity.
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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |