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Pulse oximeter and sensor optimized for low saturation

  • US 5,782,237 A
  • Filed: 03/30/1995
  • Issued: 07/21/1998
  • Est. Priority Date: 04/01/1994
  • Status: Expired due to Term
First Claim
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1. A method for measuring blood oxygen saturation, comprising the steps of:

  • providing a sensor and a pulse oximeter;

    selecting a light source and a light detector as a part of said sensor;

    optimizing a wavelength spectrum of light received by said light detector from said light source for an oxygen saturation reading less than 80 percent, said optimizing comprising receiving at said detector only red and infrared portions of said spectrum, including a portion between 700 and 790 nanometers;

    placing said sensor on a patient; and

    determining said blood oxygen saturation said sensor and said pulse oximeter.

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