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System for determining characteristics of blood flow

  • US 4,562,843 A
  • Filed: 07/06/1981
  • Issued: 01/07/1986
  • Est. Priority Date: 09/29/1980
  • Status: Expired due to Fees
First Claim
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1. A method for measuring a hemodynamic characteristic of a living body having elastic blood vessels comprising the steps of:

  • measuring a characteristic value across a section of said body, said characteristic value being at least representative of the variation in cross-sectional area of the blood vessels within that section;

    measuring blood pressure in said body simultaneously with the measurement of said characteristic value; and

    processing signals representative of the characteristic value and the blood pressure measurements with a processing means to obtain an electrical signal representing the hemodynamic characteristic;

    said processing step including the step of utilizing at least one hemodynamic equation which relates said characteristic value, said blood pressure and the modulus of elasticity of the blood vessels within said section as a function, and including the step of calculating said modulus of elasticity.

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