US3721232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical pad method for decubitus ulcer management
Assignee: TRENCHARD M
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Filing: 1968-05-24
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Granted: 1973-03-20
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Expires: 1988-05-24
Abstract
Abstract Method and surgical system for decubitus ulcer management, in which the surgical devices in the system each comprise a flexible, fluid-impervious bladder containing a gel or jelly formed as a colloidal system from water and a water-soluble resin which is a carboxy vinyl polymer of extremely high molecular weight and capable of displacement or flow within the bladder distributing the weight of the body of the user supported thereon. The mucilage or jelly has some form of elasticity and has yield value, both of which are controllable and variable and is capable of distributing pressure over an entire portion of the body resting on the bladder and avoids excessive pressure points thereon.
Inventors
- 👤 S Trenchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:59
CPC Classifications
A; A61; A61G; A61G7/00; A61G7/05; A61G7/057; A61G7/05738; Y; Y10; Y10S; Y10S5/00; Y10S5/909
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
35 words
Surgical device for supporting at least a part of the body of the user according to claim 1, in which said jelly has a viscosity in the range between about 18,000 centipoise and 58,000 centipoise.
Claim 2
Dependent Claim
32 words
Surgical device for supporting at least a part of the body of the user according to claim 1, in which said mucilage comprises a carboxy vinyl polymer of extremely high molecular weight.
Claim 3
Dependent Claim
29 words
Surgical device for supporting at least a part of the body of the user according to claim 1, in which said mucilage comprises water and a water-soluble dry resin.
Claim 4
Dependent Claim
32 words
Surgical device for supporting at least a part of the body of the user according to claim 4, in which said resin comprises a carboxy vinyl polymer of extremely high molecular weight.
Claim 5
Dependent Claim
40 words
A surgical device according to claim 1 wherein said mucilage comprises a solid constituent dispersed in and physically bonded to a liquid constituent, the physical bond being breakable by applied shear stress to permit plastic flow and being then re-established.
Claim 6
Dependent Claim
31 words
A surgical device according to claim 6 wherein the viscosity of said mucilage is variable as desired and precisely controllable by controlling the ratio of the solid to the liquid constituent.
Claim 7
Independent Claim
92 words
A method of supporting a human body comprising, mixing water and a polymer of extremely high molecular weight in a confined volume to form a deformable colloidal system characterized by plastic flow having a viscosity greater than the viscosity of water and having form elasticity and a selected yield value, and continuing confinement of said colloidal system while supporting a human body on said confined volume, whereby pressure is distributed over an entire portion of the human body resting thereon and excessive pressure points on said portion of the body are avoided.
Claim 8
Dependent Claim
135 words
A surgical device for supporting at least a part of the body of a user comprising, a liquid-impervious flexible bladder having a selected configuration, a predetermined quantity of a dry resin contained in said bladder, said resin when having a liquid added thereto forming a mucilage or jelly of selectively adjustable viscosity which at least partially fills said bladder, said mucilage when formed having a viscosity greater than water and being capable of viscous flow displacement within said bladder to thereby enable the latter to conform to and support the part of the body of the user supported on said bladder and being effective to cause pressure distribution over the entire portion of the body of the user resting on said bladder, whereby excessive pressure points on the supported portion of the body are avoided.
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |