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Patient warming or cooling blanket

  • US 5,125,238 A
  • Filed: 04/29/1991
  • Issued: 06/30/1992
  • Est. Priority Date: 04/29/1991
  • Status: Expired due to Term
First Claim
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1. A pneumatic, disposable, temperature control blanket receiving conditioned air though an external air supply connection means, comprising, in combination, an upper thermoplastic air impervious flexible sheet and a lower thermoplastic flexible sheet each having a first end, an opposing second end and edges defining a periphery, said first end lower flexible sheet being adjacent said first end upper flexible sheet, said lower sheet having a lower bottom surface, a heat seal bonding said upper flexible sheet periphery to said lower flexible sheet periphery, a pneumatic flow chamber defined by said sheets, said upper flexible sheet being heat sealed to said lower flexible sheet at a multitude of staking points distributed in a staggered pattern within said sheets'"'"' peripheral edges thereby defining redundant multiple air flow paths within said pneumatic flow chamber, an inlet air port defined in said pneumatic flow chamber, an inlet air connection means affixed to said sheets in communication with said inlet air port adapted to receive the inlet air supply connection means to inflate said pneumatic flow chamber, an outer fibrous bottom lamina material bonded to said lower flexible sheet bottom surface thereby comprising a lower laminated assembly to provide a slide resistant comfortable patient contact surface, an outwardly disposed air flow orifice array defined in said laminated assembly in communication with said pneumatic flow chamber to convey temperature controlled air from said pneumatic flow chamber to the patient, said orifice array comprising a plurality of substantially evenly spaced openings defined in said laminated assembly sized to maintain a predetermined pneumatic flow chamber pressure over a range of predetermined air source volume flow rates.

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