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Patient Monitoring Using Combination of Continuous Wave Spectrophotometry and Phase Modulation Spectrophotometry

  • US 20100198029A1
  • Filed: 02/05/2010
  • Published: 08/05/2010
  • Est. Priority Date: 02/05/2009
  • Status: Abandoned Application
First Claim
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1. A method for non-invasive spectrophotometric monitoring of oxygen saturation levels in a tissue volume of a patient during a patient monitoring session, said patient monitoring session including a reference interval and a monitoring interval subsequent to said reference interval, comprising:

  • receiving, in association with said reference interval, first information acquired from phase modulation spectrophotometry-based (PMS-based) monitoring of the tissue volume, said first information being representative of at least one absolute oxygen saturation level in a respective at least one relatively shallow region of the tissue volume;

    receiving, in association with said reference interval, second information acquired from continuous wave spectrophotometry-based (CWS-based) monitoring of the tissue volume, said second information being representative of at least one non-absolute oxygen saturation level in a respective at least one relatively deep region of the tissue volume;

    determining, based on said first and second information associated with the reference interval, a mapping between said second information and at least one estimated absolute oxygen saturation metric applicable to the respective at least one relatively deep region of the tissue volume;

    receiving, on a continuing basis during the monitoring interval, the second information acquired from the CWS-based monitoring of the tissue volume;

    computing, on a continuing basis during the monitoring interval, the at least one estimated absolute oxygen saturation metric applicable to the respective at least one relatively deep region by applying said determined mapping to said second information received during the monitoring interval;

    displaying, on a continuing basis during the monitoring interval, said at least one estimated absolute oxygen saturation metric applicable to the respective at least one relatively deep region on an output display.

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