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A SYSTEM FOR INDICATING THE EXPIRATION OF THE USEFUL OPERATING LIFE OF A PULSE OXIMETRY SENSOR

  • US 20010045509A1
  • Filed: 02/10/2000
  • Published: 11/29/2001
  • Est. Priority Date: 08/26/1999
  • Status: Active Grant
First Claim
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1. A pulse oximetry sensor comprising:

  • a drive connection carrying a drive signal, wherein the drive signal has pulses;

    a timer connected to the drive connection and configured to generate a timer output signal after a predetermined number of pulses are generated in the drive signal;

    a sensor life indicator connected to the timer output signal and configured to provide an indication when the timer output signal is generated;

    an LED network connected to the drive connection and configured to project light through a measurement site when pulsed by the drive signal; and

    a photodetector configured to detect the projected light and output a signal representative of constituents or characteristics of the measurement site.

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