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Method and apparatus for determining the state of an oximetry sensor

  • US 6,035,223 A
  • Filed: 11/19/1997
  • Issued: 03/07/2000
  • Est. Priority Date: 11/19/1997
  • Status: Expired due to Term
First Claim
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1. A method for determining whether a sensor is coupled to a tissue sample, the sensor being operable to generate a detector signal indicative of absorption of electromagnetic radiation by the tissue sample, the method comprising:

  • generating a plurality of metric values corresponding to the detector signal, each of the metric values guantifying a behavior of the detector signal which is correlated with whether the sensor is coupled to the tissue sample;

    inputting the plurality of metric values to a neural net,performing data reduction with the neural net based on dependencies among the metric values, and generating a probability value indicative of whether the sensor is coupled to the tissue sample; and

    determining whether the sensor is coupled to the tissue sample by referring to the probability value.

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