US4321914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Percutaneous conduit having PTFE skirt
Assignee: W.L. Gore and Associates Inc
•
Filing: 1980-04-22
•
Granted: 1982-03-30
•
Expires: 2000-04-22
Abstract
Abstract A percutaneous device to provide a path from the exterior of the epidermal tissue to interior body spaces and structures with a skirt of material with PTFE having an open microstructure for the ingrowth of epidermal and connective tissue.
Inventors
- 👤 Paul C. Begovac
- 👤 William C. Bruchman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:55
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/02; A61M39/0247; A61M2039/0261
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
161 words
A percutaneous device comprising: A. a button made of a biologically inert, non-porous material, said button including a top wall having a continuously curved perimeter, a pinched-waist-shaped side wall and a bottom wall having a continuously curved perimeter of larger area than said top wall, said button being capable of providing a path from the exterior of the epidermal tissue to interior body spaces and structures, B. an upper skirt and a lower skirt formed of expanded polytetrafluoroethylene having an open microstructure with a fibril length of 60 to 500 microns for the in-growth of epidermal and connective tissue, (i) said upper skirt extending up the side wall from the perimeter of said bottom wall in laminar contact with said side wall to an elevation just below the minimum diameter of said pinched-waist-shaped side wall; and (ii) said lower skirt being in laminar contact with said bottom wall and connected to said upper skirt adjacent the perimeter of said bottom wall.
Claim 2
Dependent Claim
161 words
A percutaneous device comprising: A. a button made of a biologically inert, non-porous material, said button including a top wall having a continuously curved perimeter, a pinched-waist-shaped side wall and a bottom wall having a continuously curved perimeter of larger area than said top wall, said button being capable of providing a path from the exterior of the epidermal tissue to interior body spaces and structures, B. an upper skirt and a lower skirt formed of expanded polytetrafluoroethylene having an open microstructure with a fibril length of 60 to 500 microns for the in-growth of epidermal and connective tissue, (i) said upper skirt extending up the side wall from the perimeter of said bottom wall in laminar contact with said side wall to an elevation just below the minimum diameter of said pinched-waist-shaped side wall; and (ii) said lower skirt being in laminar contact with said bottom wall and connected to said upper skirt adjacent the perimeter of said bottom wall.
Claim 3
Dependent Claim
16 words
The percutaneous device of claim 1 wherein the expanded polytetrafluoroethylene has fibril length of 100-150 microns.
Claim 4
Dependent Claim
21 words
The percutaneous device of claim 1 wherein the path is a conduit extending from said top wall to said bottom wall.
Claim 5
Dependent Claim
14 words
The percutaneous device of claim 3 having a removable plug for closing the conduit.
Claim 6
Dependent Claim
19 words
The percutaneous device of claim 4 including electrically conductive wires extending from said top wall to said bottom wall.
Claim 7
Dependent Claim
17 words
The percutaneous device of claim 3 wherein wires or tubes are secured in the conduit by adhesives.
Claim 8
Dependent Claim
18 words
The percutaneous device of claim 4 wherein the plug is composed of the same material as the button.
Claim 9
Dependent Claim
20 words
The percutaneous device of claim 1 wherein the button is made of full density polytetrafluoroethylene, carbon, titanium, silicon or polycarbonate.
Claim 10
Dependent Claim
24 words
The percutaneous device of claim 1 wherein the skirt is impregnated with biologically active material prior to insertion of the device in the body.
Claim 11
Dependent Claim
42 words
The percutaneous device of claim 1 wherein the device has a vertical height of 0.20-1.25 inches, a maximum flange diameter of 0.40 to 4.00 inches, a collar diameter of 0.10-1.50 inches at the pinched waist and 0.15-2.00 inches at the top surface.
Claim 12
Dependent Claim
16 words
The percutaneous device of claim 1 wherein the expanded polytetrafluoroethylene has a thickness of 0.01-0.25 inches.
Claim 13
Dependent Claim
15 words
The percutaneous device of claim 1 wherein a mechanical apparatus is incorporated in the path.
References Cited (Backward Citations)
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US3964470A
Cited
US3993079A
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US4014347A
Cited
US3995644A
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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) | 1985-03-29 | 1985-09-28 | 1986-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-29 | 1989-09-28 | 1990-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-29 | 1993-09-28 | 1994-03-30 | $7700.00 | Window Closed / Lapsed |