US4391276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peritoneal catheter
Assignee: Individual
•
Filing: 1980-12-16
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Granted: 1983-07-05
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Expires: 2000-12-16
Abstract
Abstract A safer peritoneal catheter with improved non-plugging characteristics is disclosed. The catheter has very fine sidewall openings which generally have projections associated therewith which tend to prevent the openings from becoming clogged with tissue. The catheter and side holes are sized to facilitate removal of blood and liquids from the peritoneal cavity. The very fine sidewall openings enhance the reliability of the catheter while permitting it to have excellent strength and resistance to breakage.
Inventors
- 👤 Harrison Lazarus
- 👤 James A. Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:07
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/007; A61M1/00; A61M1/14; A61M1/28; A61M1/285
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
A catheter comprising: a thin-walled, hollow-bore tubular member having an opening on an extraction end, said tubular member having a hollow-bore diameter of from about 1.0 to about 3.5 millimeters and an external diameter of from about 2.0 to about 4.0 millimeters; a plurality of sidewall openings in said tubular member, said openings having protrusions associated therewith protruding from the exterior sidewall, at least a substantial portion of said protrusions being longitudinally aligned with a substantial portion of said sidewall openings, said sidewall openings having a diameter of from about 0.01 to about 2.0 millimeters and said sidewall protrusions project from about 0.01 to about 1.0 millimeter from the exterior wall surface.
Claim 2
Dependent Claim
112 words
A catheter comprising: a thin-walled, hollow-bore tubular member having an opening on an extraction end, said tubular member having a hollow-bore diameter of from about 1.0 to about 3.5 millimeters and an external diameter of from about 2.0 to about 4.0 millimeters; a plurality of sidewall openings in said tubular member, said openings having protrusions associated therewith protruding from the exterior sidewall, at least a substantial portion of said protrusions being longitudinally aligned with a substantial portion of said sidewall openings, said sidewall openings having a diameter of from about 0.01 to about 2.0 millimeters and said sidewall protrusions project from about 0.01 to about 1.0 millimeter from the exterior wall surface.
Claim 3
Dependent Claim
28 words
The catheter of claim 1 wherein said sidewall openings each have a substantially smaller cross-sectional area than the cross-sectional area of the longitudinal opening of the hollow-bore member.
Claim 4
Dependent Claim
15 words
The catheter of claim 1 wherein at least six to 100 sidewall openings are present.
Claim 5
Dependent Claim
21 words
The catheter of claim 1 wherein said tubular member has a length of from about 10 millimeters to about 25 millimeters.
Claim 6
Dependent Claim
18 words
The catheter of claim 1 wherein said protrusions substantially encircles at least a portion of said sidewall openings.
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) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |