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Adaptive pneumatic tourniquet

  • US 4,479,494 A
  • Filed: 01/05/1982
  • Issued: 10/30/1984
  • Est. Priority Date: 01/05/1982
  • Status: Expired due to Term
First Claim
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1. A pneumatic tourniquet for employing the minimum safe pressure to occlude blood flow into a patient'"'"'s limb, comprising:

  • an inflatable cuff;

    pressurizing means for pressurizing said cuff;

    pressure relief means for depressurizing said cuff;

    cuff pressure sensing means for sensing said cuff pressure;

    blood pressure sensing means for sensing the patient'"'"'s systolic blood pressure; and

    pressure regulator means responsive to variations in said systolic blood pressure for selectably activating said pressurizing means and said pressure relief means to maintain the cuff pressure above said systolic blood pressure and to maintain a substantially constant pressure difference between said cuff pressure and said systolic blood pressure.

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