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Medical sensor with modulated encoding scheme

  • US 5,779,630 A
  • Filed: 05/26/1995
  • Issued: 07/14/1998
  • Est. Priority Date: 12/17/1993
  • Status: Expired due to Term
First Claim
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1. A pulse oximeter sensor comprising:

  • a first emitter which emits light of a first known wavelength;

    a photosensor for sensing the light emitted by the first emitter;

    a transmitter for coupling said sensor to a remote oximeter;

    an encoder for encoding a value indicative of said first known wavelength as a coded value;

    a modulator, coupled to said transmitter, for providing said coded value as a modulated signal to said transmitter, wherein said transmitter is adapted to transmit said modulated signal to said remote oximeter for use in an oxygen saturation measurement.

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