×

Blood pressure estimating apparatus and method

  • US 6,036,651 A
  • Filed: 05/29/1998
  • Issued: 03/14/2000
  • Est. Priority Date: 05/12/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. An apparatus for successively estimating an intraarterial blood pressure of a living subject, based on information non-invasively obtained from a circulatory organ of the subject, comprising:

  • first means for non-invasively obtaining, from the circulatory organ of the subject, first information which relates to velocity of propagation of a pulse wave which propagates through an artery of the subject;

    second means for non-invasively obtaining, from the circulatory organ of the subject, at least one of second information which relates to heart rate of the subject and third information which relates to an area defined by a volume pulse wave from a peripheral portion of the subject;

    third means for estimating, according to a predetermined relationship between (A) blood pressure, and (B1) first information and (B2) at least one of (B21) second information and (B22) third information, the intraarterial blood pressure of the subject, based on the first information obtained by the first means and said at least one of the second information and the third information obtained by the second means, the predetermined relationship being defined by a numerical expression including a plurality of predetermined coefficients; and

    fourth means for selecting, from a plurality of groups of predetermined coefficients which correspond to a plurality of blood-pressure ranges, respectively, one group of predetermined coefficients which corresponds to a blood pressure of the subject, so that the third means estimates the intraarterial blood pressure of the subject according to the numerical expression including the selected group of predetermined coefficients.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×