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Blood pressure monitoring system

  • US 5,099,853 A
  • Filed: 05/02/1988
  • Issued: 03/31/1992
  • Est. Priority Date: 12/25/1986
  • Status: Expired due to Term
First Claim
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1. A blood pressure monitoring system for continuously measuring blood pressure of a living body, the system comprising:

  • pulse wave detecting means for detecting pulse waves of an arterial vessel of said living body,said pulse wave detecting means comprising a plurality of pressure sensors which are adapted to be set on a body surface of said living body above said arterial vessel, each of said pressure sensors having a dimension smaller than a diameter of said arterial vessel as viewed in a direction perpendicular to said arterial vessel;

    pressing means for pressing said pulse wave detecting means against said arterial vessel via said body surface and thereby at least partially flattening said arterial vessel, at least one of said pressure sensors detecting said pulse waves through a flattened wall of said arterial vessel;

    blood pressure measuring means for measuring an actual blood pressure of said living body;

    control means for determining a relationship between blood pressure and magnitude of pulse waves, based on the pulse waves detected by said at least one pressure sensor through said flattened wall of said arterial vessel and the actual blood pressure measured by said blood pressure measuring means, such that blood pressure is a linear function of magnitude of said pulse waves,said control means determining blood pressures according to the thus-determined relationship based on magnitudes of the pulse waves detected by said at least one pressure sensor through said flattened wall of said arterial vessel; and

    display means for displaying the blood pressures determined by said control means.

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