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Method and apparatus for measuring cardiac output

  • US 6,758,822 B2
  • Filed: 09/05/2001
  • Issued: 07/06/2004
  • Est. Priority Date: 04/27/1999
  • Status: Expired due to Term
First Claim
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1. A method for measuring cardiac output (CO) of a patient, comprising the following steps:

  • sensing arterial blood pressure and converting the sensed arterial blood pressure to a pressure signal;

    calculating an estimate of stroke volume as a function only of selected characteristics of the sensed pressure signal, including calculating an area (A) under the entire pressure signal including both pulsatile and non-pulsatile portions of the pressure signal; and

    calculating an estimate of CO as a function of the estimated stroke volume and a current heart rate value.

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