US4442838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Malignant hyperthermia mattress
Assignee: Department of National Defence
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Filing: 1982-03-25
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Granted: 1984-04-17
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Expires: 2002-03-25
Abstract
Abstract A mattress for the treatment of malignant hyperthermia comprises a base to overlie an operating table and an inflatable wall extending around the periphery of the base. The wall includes a pair of discontinuities which permit the patient's arms to extend across the inflated wall. A sealing cuff and flap encompass the arm and seal the discontinuity to prevent egress of water from around the patient. A recess is provided in the wall adjacent the patient's head to allow the anethetist access to the patient when the wall is inflated.
Inventors
- 👤 J. E. Benoit Samson
- 👤 Lawrence W. Duncan
- 👤 Jean C. Steffler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:45
CPC Classifications
A; A61; A61G; A61G13/00; A61G13/10; A61G13/102; A61G13/12; A61G13/126; A61G13/1265
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
127 words
A mattress adapted to overlie an operating table for use in the treatment of malignant hyperthermia, comprising a base having a peripheral edge, an inflatable wall extending around said peripheral edge and having an upper portion delimiting said wall and a lower portion operatively connected to said base, said wall including a pair of recesses positioned in opposed areas of said wall and extending from said upper portion toward said lower portion, to accommodate the arms of a patient lying on said mattress, flexible flap means extending across each of said recesses, and inflation means associated with said wall to inflate said wall from a generally deflated condition in which said upper edge lies adjacent said base to an inflated condition in which said wall is upstanding.
Claim 2
Dependent Claim
127 words
A mattress adapted to overlie an operating table for use in the treatment of malignant hyperthermia, comprising a base having a peripheral edge, an inflatable wall extending around said peripheral edge and having an upper portion delimiting said wall and a lower portion operatively connected to said base, said wall including a pair of recesses positioned in opposed areas of said wall and extending from said upper portion toward said lower portion, to accommodate the arms of a patient lying on said mattress, flexible flap means extending across each of said recesses, and inflation means associated with said wall to inflate said wall from a generally deflated condition in which said upper edge lies adjacent said base to an inflated condition in which said wall is upstanding.
Claim 3
Dependent Claim
19 words
A mattress according to claim 1 wherein said wall includes a further recess located between said pair of recesses.
Claim 4
Dependent Claim
20 words
A mattress according to claim 1 including drain means in said base to permit drainage of fluid through said base.
Claim 5
Dependent Claim
129 words
A mattress for use in treatment of malignant hyperthermia comprising a base adapted to overlie an operating table, an inflatable wall extending around the periphery of said base, said wall comprising an inner wall member, an outer wall member spaced from said inner wall member, and upper and lower interconnecting wall members extending between said inner and outer wall members at spaced locations, said wall including a pair of opposed recesses extending from discontinuities in said upper wall member toward said lower wall member to accommodate the arms of a patient lying on said mattress, flexible flap means extending across each of said recesses and inflation means associated with said wall to permit inflation thereof whereby said wall may be inflated from a deflated condition to upstanding inflated condition.
Claim 6
Dependent Claim
129 words
A mattress for use in treatment of malignant hyperthermia comprising a base adapted to overlie an operating table, an inflatable wall extending around the periphery of said base, said wall comprising an inner wall member, an outer wall member spaced from said inner wall member, and upper and lower interconnecting wall members extending between said inner and outer wall members at spaced locations, said wall including a pair of opposed recesses extending from discontinuities in said upper wall member toward said lower wall member to accommodate the arms of a patient lying on said mattress, flexible flap means extending across each of said recesses and inflation means associated with said wall to permit inflation thereof whereby said wall may be inflated from a deflated condition to upstanding inflated condition.
Claim 7
Dependent Claim
32 words
A mattress according to claim 4 wherein said recesses are defined by a pair of spaced opposed end walls connected between said inner and outer walls and attached to upper wall member.
Claim 8
Dependent Claim
31 words
A mattress according to claim 5 wherein communication means are provided between said side walls to permit air to pass within said wall from one side of said recess to another.
Claim 9
Dependent Claim
30 words
A mattress according to claim 6 wherein said communication means includes a plurality of passages formed between said lower wall member and a closure member extending between said side walls.
Claim 10
Dependent Claim
39 words
A mattress according to claim 7 including a pair of inlets for pressurized gas for inflation of said wall, said inlets being arranged to provide rapid inflation of said wall in opposite directions around the periphery of said base.
Claim 11
Dependent Claim
44 words
A mattress according to claim 4 including partition members extending from said inner wall to said outer wall between said upper and lower wall members, said partition members having a plurality of apertures to permit air flow across said partition members within said wall.
Claim 12
Dependent Claim
16 words
A mattress according to claim 4 including a further recess located intermediate said pair of recesses.
Claim 13
Dependent Claim
42 words
A mattress according to claim 10 wherein said inflation means includes a pair of pressurised gas cylinders located on said wall on opposite sides of said further recess, said cylinders causing rapid inflation of said wall in opposite directions around said base.
Claim 14
Dependent Claim
31 words
A mattress according to claim 4 wherein said flap means includes an upper flap and a cuff located below said upper flap to seal around an arm passing through said recess.
Claim 15
Dependent Claim
46 words
A mattress according to claim 12 wherein said upper flap is attached to said inner wall at one side of said recess and securing means are provided on said inner wall on the opposite side of said recess to hold said upper flap across said recess.
Claim 16
Dependent Claim
24 words
A mattress according to claim 12 wherein said cuff is formed from a pair of cuff members extending from opposite sides of said recess.
Claim 17
Dependent Claim
125 words
A mattress for use in treatment of malignant hyperthermia comprising a generally rectangular base with a head edge, a bottom edge and a pair of side edges, an inflatable wall extending around said edges to encompass a patient lying on said base, said wall having a lower portion connected to said base and an upper portion delimiting said wall, a discontinuity in each portion of said wall connected to said side edges, each of said discontinuities extending downwardly from the upper portion to provide a pair of opposed recesses permitting an arm of said patient to extend through said wall, sealing means associated with each of said recesses to extend across said discontinuity and seal around said arm, and inflation means to inflate said wall.
Claim 18
Dependent Claim
125 words
A mattress for use in treatment of malignant hyperthermia comprising a generally rectangular base with a head edge, a bottom edge and a pair of side edges, an inflatable wall extending around said edges to encompass a patient lying on said base, said wall having a lower portion connected to said base and an upper portion delimiting said wall, a discontinuity in each portion of said wall connected to said side edges, each of said discontinuities extending downwardly from the upper portion to provide a pair of opposed recesses permitting an arm of said patient to extend through said wall, sealing means associated with each of said recesses to extend across said discontinuity and seal around said arm, and inflation means to inflate said wall.
Claim 19
Dependent Claim
14 words
A mattress according to claim 15 wherein drain means are provided in said base.
Claim 20
Dependent Claim
32 words
A mattress according to claim 15 wherein a further discontinuity is provided in said wall adjacent said head edge to permit access to the head of a patient lying on said base.
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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) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |