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System and methods for measuring oxygenation parameters

  • US 6,390,977 B1
  • Filed: 12/11/1996
  • Issued: 05/21/2002
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Fees
First Claim
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1. A relatively non-invasive method for determining, in real-time, one or more physiological parameters indicative of a tissue oxygenation status of a patient, comprising the steps of:

  • attaching a catheter to an artery of said patient, wherein said catheter is not attached to a pulmonary vein or pulmonary artery;

    storing oxygenation constants into a first computer memory;

    calculating beat-to-beat cardiac output values (CO) of a patient in real-time, wherein the cardiac output values are saved to a second computer memory;

    determining the arterial oxygen content (CaO2) of said patient; and

    using said cardiac output values and said arterial oxygen content to calculate, in real-time, said one or more parameters indicative of tissue oxygenation status of a patient wherein said parameters are updated often enough to provide a clinically useful indication of the patient'"'"'s condition.

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