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Method and apparatus for determining cardiac output or total peripheral resistance

  • US 6,485,431 B1
  • Filed: 11/16/2000
  • Issued: 11/26/2002
  • Est. Priority Date: 11/24/1999
  • Status: Expired due to Term
First Claim
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1. A method for deriving cardiac output in a patient comprising the steps of:

  • measuring continuously the arterial pressure at a point within the cardiovascular system to derive an arterial pressure waveform;

    determining the mean arterial pressure from said arterial pressure waveform;

    determining the compliance of the arterial system for the patient;

    determining the time constant of the arterial system from the arterial pressure waveform and deriving the mean cardiac output as the product of the mean arterial pressure and compliance divided by said time constant.

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