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Contoured protrusion for improving spectroscopic measurement of blood constituents

  • US 8,437,825 B2
  • Filed: 07/02/2009
  • Issued: 05/07/2013
  • Est. Priority Date: 07/03/2008
  • Status: Active Grant
First Claim
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1. A noninvasive medical sensor configured to detect light attenuated by a digit of a medical patient, the sensor comprising:

  • a sensor housing comprising an upper shell and a lower shell pivotally connected together, the upper and lower shells each shaped to accept the digit of the medical patient;

    one or more emitters disposed in the housing, the one or emitters configured to impinge light on the digit of the patient;

    one or more detectors disposed in the housing, the one or more detectors configured to receive the light after attenuation by the digit of the patient and to output one or more intensity signals responsive to the attenuated light; and

    a tissue thickness adjuster disposed in the housing, the tissue thickness adjuster positioned such that placement of the digit of the patient on the tissue thickness adjuster reduces a thickness of the digit, increasing a gain of the one or more intensity signals, the tissue thickness adjuster comprising a partial cylinder having an axis configured to be substantially parallel to a long axis of the digit of the patient and between the one or more emitters and the one or more detectors.

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