US3638649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implantable prosthetic pass-through device
Assignee: NEUROMEDICS Inc A CORP OF TX
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Filing: 1969-07-07
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Granted: 1972-02-01
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Expires: 1989-07-07
Abstract
Abstract An implantable through-the-skin prosthetic device for the permanent entry into the body for passage of liquid, conductors or the like. The device includes a roughened synthetic resinous member that courses through the skin and subcutaneous tissues and into the body. This special roughening promotes tissue ingrowth and thus effects a firm mechanical seal. Animal experimentation and clinical success imply that the seal is also dry and germproof. One form of such a device is an arteriovenous shunt for use in artificial dialysis. A roughened plastic cannula passes through the skin into the blood vessel itself. A ball joint fitting for connection to the external circuits allows for one-handed operation by a trained patient. A special reamer is provided for use with the shunt.
Inventors
- 👤 Robert A Ersek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:52
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/02; A61M39/0247; A61L; A61L29/00; A61L29/04; A61L29/06; A61M1/00; A61M1/36; A61M1/3621; A61M1/3653; A61M1/3655; A61M2039/0261
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
96 words
An implantable through-the-skin prosthetic cannula device for making a firm dry germproof mechanical seal, said device comprising: A. a flexible inert nontoxic synthetic resinous tube of length and subcutaneous tissue of a living being, B. at least a portion of the length of said tube at least sufficient to extend through said cutaneous and subcutaneous tissue having a roughened outer surface, C. said roughened surface consisting of a plurality of integral closely spaced hairlike projecting fibers whereby tissue ingrowth into and among said projecting fibers is promoted when said tube is implanted into living body tissue.
Claim 2
Dependent Claim
96 words
An implantable through-the-skin prosthetic cannula device for making a firm dry germproof mechanical seal, said device comprising: A. a flexible inert nontoxic synthetic resinous tube of length and subcutaneous tissue of a living being, B. at least a portion of the length of said tube at least sufficient to extend through said cutaneous and subcutaneous tissue having a roughened outer surface, C. said roughened surface consisting of a plurality of integral closely spaced hairlike projecting fibers whereby tissue ingrowth into and among said projecting fibers is promoted when said tube is implanted into living body tissue.
Claim 3
Dependent Claim
19 words
A device according to claim 1 further characterized in that said synthetic resinous tube is formed from polytetrafluoroethylene resin.
Claim 4
Dependent Claim
56 words
A method of making a firm dry germproof mechanically sealed passage through the skin of a living being which comprises implanting a tubular device according to claim 1 extending through the cutaneous and subcutaneous tissue of a living being and maintaining therein by means of attachment between the body tissues and roughened surface of the tube.
Claim 5
Dependent Claim
56 words
An arteriovenous shunt comprising: A. a pair of cannula segments according to claim 1, each having a roughened outer surface intermediate of their ends, B. a distal arterial segment and a distal venous segment, C. occlusion means connecting each of said distal segments with a cannula segment, and D. disengageable junction means between said distal segments.
Claim 6
Dependent Claim
38 words
An arteriovenous shunt according to claim 4 further characterized in that said junction means comprises a bulbous male member on one of said distal segments and a mating female socket member on the other of said distal segments.
Claim 7
Dependent Claim
32 words
An arteriovenous shunt according to claim 4 further characterized in that the outer surface of the tip of each of said cannula segments opposite from said occlusion means is smooth and tapered.
Claim 8
Dependent Claim
90 words
An arteriovenous shunt according to claim 4 further characterized in that: A. said occlusion means comprises a length of flexible tubing extending telescopically over the ends of the cannula segments and distal segments connected thereby, B. the ends of said cannula segments and distal segments telescoped within the ends of the occlusion means are provided with a cuff of enlarged exterior diameter, and C. means are provided to secure the ends of said occlusion means to the ends of said cannula segments and distal segments spaced inwardly from said cuffs.
Claim 9
Dependent Claim
23 words
An arteriovenous shunt according to claim 4 further characterized in that said cannula segments and said distal segments are formed from polytetrafluoroethylene resin.
Claim 10
Dependent Claim
20 words
An arteriovenous shunt according to claim 4 further characterized in that said occlusion means is formed from silicone rubber tubing.
Claim 11
Dependent Claim
73 words
An arteriovenous shunt according to claim 5 further characterized in that: A. said mating male and female members are relatively thin walled, B. said male member mates with a close sealing fit in said female member, and C. the open end of said female member is of diameter less than the outer diameter of the bulbous male member such that slight deformation of said members occurs during engagement and disengagement of the members.
Claim 12
Dependent Claim
131 words
An arteriovenous shunt comprising: A. a semirigid tubular arterial cannula segment and a semirigid tubular venous cannula segment formed from polytetrafluoroethylene resin, B. a roughened outer surface composed of a plurality of closely spaced hairlike projecting fibers intermediate of the ends of each of said cannula segments, C. a smooth and tapered outer surface intravascular tip on each of said cannula segments, D. a distal arterial segment and a distal venous segment formed from polytetrafluoroethylene resin, E. tubular silicone rubber occlusion means extendinG telescopically over the ends of each of said respective cannula segments and distal segments connecting the same, and F. disengageable junction means between said distal segments comprising a bulbous male member on one of said segments and a mating female socket member on the other of said segments.
Claim 13
Dependent Claim
131 words
An arteriovenous shunt comprising: A. a semirigid tubular arterial cannula segment and a semirigid tubular venous cannula segment formed from polytetrafluoroethylene resin, B. a roughened outer surface composed of a plurality of closely spaced hairlike projecting fibers intermediate of the ends of each of said cannula segments, C. a smooth and tapered outer surface intravascular tip on each of said cannula segments, D. a distal arterial segment and a distal venous segment formed from polytetrafluoroethylene resin, E. tubular silicone rubber occlusion means extendinG telescopically over the ends of each of said respective cannula segments and distal segments connecting the same, and F. disengageable junction means between said distal segments comprising a bulbous male member on one of said segments and a mating female socket member on the other of said segments.
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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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |