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Pulse oximeter with parallel saturation calculation modules

  • US 7,302,284 B2
  • Filed: 01/19/2005
  • Issued: 11/27/2007
  • Est. Priority Date: 08/07/1995
  • Status: Expired due to Fees
First Claim
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1. A pulse oximeter comprising:

  • a sensor configured to detect first and second electromagnetic radiation signals from a patient corresponding to first and second wavelengths of light;

    an analog to digital converter, coupled to the sensor, for converting said first and second electromagnetic radiation signals into first and second digital signals; and

    a processor coupled to the analog to digital converter, the processor being programmed with;

    a filter module configured to filter the first and second digital signals,a first oxygen saturation calculation module configured to determine a first oxygen saturation value using a first saturation calculation algorithm applied to the first and second digital signals,a second oxygen saturation calculation module configured to determine a second oxygen saturation value using a second saturation calculation algorithm applied to the first and second digital signals, andan arbitration module configured to arbitrate between the first and second oxygen saturation values based on a saturation confidence associated with the first and second oxygen saturation values to select a best oxygen saturation value.

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