Pulse oximeter probe-off detection system

  • US 6,771,994 B2
  • Filed: 02/24/2003
  • Issued: 08/03/2004
  • Est. Priority Date: 06/18/1999
  • Status: Expired due to Term
First Claim
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1. A pulse oximetry probe comprising:

  • a flexible probe body configured to contact the skin of a patient on opposing surfaces of a body member of the patient when the probe body is properly affixed to the patient;

    light emitting diodes incorporated into the probe body;

    a light sensitive detector which detects light from a first direction originally emitted by the light emitting diodes, wherein the light comprises at least first and second wavelengths and has been transmitted through body tissue carrying pulsing blood; and

    at least one structure positioned approximately parallel to the first direction and is configured to filter out light from reaching the light sensitive detector from a direction substantially different from the first direction.

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