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Method for measuring venous oxygen saturation

  • US 6,985,763 B2
  • Filed: 11/30/2001
  • Issued: 01/10/2006
  • Est. Priority Date: 01/19/2001
  • Status: Expired due to Fees
First Claim
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1. A method for measuring the venous oxygen saturation comprising the steps of:

  • illuminating an area of tissue of a subject with intensity modulated light at at least two wavelengths, said subject being free from mechanical ventilation devices and free from venous perturbationssensing diffusely reflected light caused by said illumination to acquire time resolved measurement data; and

    processing said time resolved measurement data to determine the absolute saturation of the venous compartment, said processing comprising at least determining an amplitude of respiration induced absorption oscillations.

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