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Blood pressure monitor

  • US 20010037068A1
  • Filed: 06/28/2001
  • Published: 11/01/2001
  • Est. Priority Date: 10/24/1996
  • Status: Active Grant
First Claim
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1. A blood pressure monitor comprising:

  • an inflatable cuff which is adapted to be wound around a body portion of a living subject to press said body portion;

    a pressure sensor which detects a pressure in said cuff;

    a cuff-pressure regulating device which increases the pressure of said cuff;

    pulse-amplitude determining means for determining an amplitude of each of pulses of a pulse wave which are produced in said cuff and detected by said pressure sensor while the pressure of said cuff is increased by said cuff-pressure regulating device;

    candidate determining means for determining, as a diastolic blood pressure candidate, a pressure of said cuff which is detected by said pressure sensor and which corresponds to an amplitude of a first pulse of said pulses determined by said pulse-amplitude determining means, by judging whether the amplitude of said first pulse is not greater than a reference value which is smaller than an amplitude of at least one second pulse of said pulses, by a predetermined proportion of the amplitude of said second pulse, the amplitude of said second pulse being determined by said pulse-amplitude determining means after the amplitude of said first pulse is determined; and

    blood-pressure determining means for determining, as a monitor diastolic blood pressure value, said pressure of said cuff corresponding to said amplitude of said first pulse, when said candidate determining means determines, as said diastolic blood pressure candidate, said pressure of said cuff corresponding to said amplitude of said first pulse, with respect to a predetermined number of said at least one second pulse.

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