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Blood pressure monitoring apparatus

  • US 6,083,171 A
  • Filed: 11/01/1996
  • Issued: 07/04/2000
  • Est. Priority Date: 11/02/1995
  • Status: Expired due to Term
First Claim
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1. A blood pressure monitoring apparatus comprising:

  • blood pressure measuring means for measuring blood pressure using a cuff;

    storage means for storing a pulse wave propagation time change threshold and a cardiovascular dynamic change threshold, both thresholds being inputted from an external device;

    time interval detection reference point detecting means for detecting a time interval detection reference point on a pulse wave at an aorta of a body;

    pulse wave detecting means for detecting a pulse wave at a peripheral blood vessel appearing with a time delay with respect to said pulse wave at said aorta;

    pulse wave propagation time counting means for counting a pulse wave propagation time based on detected outputs from said time interval detection reference point detecting means and said pulse wave detecting means;

    pulse wave propagation time change calculating means for calculating a pulse wave propagation time change from said two pulse wave propagation times counted by said pulse wave propagation time counting means;

    cardiovascular dynamic change calculating means for calculating a cardiovascular dynamic change from said time interval detection reference point or said pulse wave at said peripheral blood vessel;

    first judging means for judging whether or not said pulse wave propagation time change calculated by said pulse wave propagation time change calculating means exceeds said pulse wave propagation time change threshold stored in said storage means;

    second judging means for judging whether or not said cardiovascular dynamic change calculated by said cardiovascular dynamic change calculating means exceeds said cardiovascular dynamic change threshold stored in said storage means; and

    control means for controlling said blood pressure measuring means and for measuring blood pressure of a subject using said cuff if it is judged that said pulse wave propagation time change exceeds said pulse wave propagation time change threshold or if it is judged that said cardiovascular dynamic change exceeds said cardiovascular dynamic change threshold.

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