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Automated mean arterial blood pressure monitor with data enhancement

  • US 4,754,761 A
  • Filed: 10/27/1986
  • Issued: 07/05/1988
  • Est. Priority Date: 07/05/1985
  • Status: Expired due to Term
First Claim
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1. In combination in digital processor controlled automated blood pressure measuring apparatus operative in conjunction with a stored program:

  • (a) an inflatable cuff;

    (b) means for inflating and deflating said cuff;

    (c) pressure transducer means coupled to said cuff for signalling the pressure existing in said cuff;

    (d) means responsive to the pressure signalled by said transducer for generating a signal representing blood pressure oscillation complexes sensed by said cuff and said transducer coupled thereto;

    (e) complex peak storing means for storing values characterizing the peak amplitudes of said detected oscillation complexes at different cuff pressures;

    (f) cuff pressure storing means for storing the cuff pressures existing when said complex peak amplitudes arose; and

    (g) mean arterial pressure determining means, said mean arterial pressure determining means comprising(i) means for locating the maximum complex peak amplitude stored in said complex peak storing means;

    (ii) means for locating a successor complex peak amplitude value stored in said complex peak storing means, said successor being the one next occurring after said maximum complex peak amplitude arose;

    (iii) means, responsive to the value of said successor complex peak for selecting plural ones of the complex peak amplitudes which were generated at cuff pressures higher than that existing when said maximum complex peak arose; and

    (iv) determining means for determining mean arterial pressure from1said selected plural ones of the complex peak amplitudes,2 the cuff pressures stored in said cuff pressure storing means corresponding to said selected plural ones, and3 the cuff pressure which corresponds to said successor complex peak amplitude.

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