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Method and apparatus for measuring blood pressure

  • US 4,774,960 A
  • Filed: 10/30/1986
  • Issued: 10/04/1988
  • Est. Priority Date: 10/30/1986
  • Status: Expired due to Fees
First Claim
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1. In an oscillometric blood pressure measuring apparatus of the type measuring pulsatile perturbations in a patient'"'"'s blood pressure at a plurality of different measurement pressures of a sphygmomanometer cuff, to derive a blood pressure model for the patient, the model being stored in the apparatus as a series of pulsatile perturbations together with the associated cuff pressures, the improvement comprising:

  • means operative on the stored model for generating a characteristic curve approximating the stored model in the vicinity of a predefined index value of cuff pressure;

    means for maintaining the pressure of said cuff within a predetermined range, r, of said index value; and

    means jointly responsive to said characteristic curve and to the magnitude of sensed pulsatile perturbations in said cuff pressure for tracking changes in said index value, to estimate a new value for said index value.

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