Patent US3807409A successfully refreshed from Google Patents.
US3807409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical ventilation tube
Assignee: MEDICAL PROD CORP
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Filing: 1972-08-31
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Granted: 1974-04-30
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Expires: 1992-08-31
Abstract
Abstract Medical ventilation tube one embodiment of which is specifically useful for surgical ventilation and drain for the middle ear. The prosthesis is constructed of silicone rubber in a tubular shape having an inner and outer flange, the inner flange of which is substantially larger than the outer flange. The inner flange is also characterized by having a V-shaped notch removed therefrom to assist in the insertion and removal of the drain prosthesis. In addition, the exterior flange has a special upstanding lip which assists in the grasping and removal of the prosthesis. The prosthesis comes in several sizes depending on the severity of the medical problem. Typical uses of the prosthesis is as a drain for otitis media and as a prosthetic airway or eustachian tube. The prosthesis for this invention may be useful generally as drains or ventilation tubes in medical situations.
Inventors
- 👤 M Paparella
- 👤 E Goldberg
- 👤 R Ostensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:52
CPC Classifications
A; A61; A61F; A61F11/00; A61F11/20; A61F11/202
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
179 words
A medical prosthesis adapted for ventilation or drainage from the middle ear comprising in unitary combination; a. a tube, b. an inner circular flange secured to said tube, c. an outer circular flange secured to said tube, d. said inner and outer flange being substantially parallel and spaced apart a distance sufficient to span the wall thickness of a tissue delimiting the space or area to be drained. e. said inner flange having a radial width larger than said outer flange, f. said inner flange having a portion of its circumference removed to provide a notch and to assist in the insertion or removal of said prosthesis, g. said tubes and flanges being composed of pliable material compatible with body tissue, h. said outer flange having a tab portion integrally combined to the flange and made of the same material as the tube and flanges adapted to be easily grasped by an insertion or removal instrument, thereby to provide a medical prosthesis resistant to spontaneous extrusion from the middle ear while being simple to insert and remove when needed.
Claim 2
Dependent Claim
179 words
A medical prosthesis adapted for ventilation or drainage from the middle ear comprising in unitary combination; a. a tube, b. an inner circular flange secured to said tube, c. an outer circular flange secured to said tube, d. said inner and outer flange being substantially parallel and spaced apart a distance sufficient to span the wall thickness of a tissue delimiting the space or area to be drained. e. said inner flange having a radial width larger than said outer flange, f. said inner flange having a portion of its circumference removed to provide a notch and to assist in the insertion or removal of said prosthesis, g. said tubes and flanges being composed of pliable material compatible with body tissue, h. said outer flange having a tab portion integrally combined to the flange and made of the same material as the tube and flanges adapted to be easily grasped by an insertion or removal instrument, thereby to provide a medical prosthesis resistant to spontaneous extrusion from the middle ear while being simple to insert and remove when needed.
Claim 3
Dependent Claim
21 words
A prosthesis as in claim 1 wherein said flanges are disposed at substantially right angles to the lumen in said tube.
Claim 4
Dependent Claim
21 words
A prosthesis as in claim 1 wherein at least one of said flanges is disposed at the end of said tube.
Claim 5
Dependent Claim
17 words
A prosthesis as in claim 1 wherein said pliable material is a low durometer, physiologically acceptable silicone.
Claim 6
Dependent Claim
29 words
A prosthesis as in claim 1 wherein said flanges are disposed at opposite ends of said tube, said flanges being oriented substantially perpendicular to the lumen in said tube.
Claim 7
Dependent Claim
77 words
A prosthesis as in claim 1 wherein: a. said outer flange is thicker than said inner flange and adapted to be grasped by insertion or removal instruments, and, b. said inner flange is relatively thin and flexible for ease of insertion or removal, and is adapted to present a surface area greater than the area of the lumen in said tube to the inner surface of said tissue to resist spontaneous extrusion over long periods of time.
References Cited (Backward Citations)
US2754520A
Cited
US3589368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |