Patent ID: 6390977
Filing Date: 2002-05-21
Classification: A61B

Abstract:
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.