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Low power pulse oximeter

  • US 6,697,658 B2
  • Filed: 06/26/2002
  • Issued: 02/24/2004
  • Est. Priority Date: 07/02/2001
  • Status: Expired due to Term
First Claim
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1. A low power pulse oximeter comprising:

  • a sensor interface adapted to drive a pulse oximetry sensor and receive a corresponding input signal;

    a processor that derives a physiological measurement corresponding to said input signal;

    a display driver adapted to communicate said measurement to a display;

    a controller gernerating a sampling control output to at least one of said sensor interface and said processor so as to reduce the average power consumption of said pulse oximeter consistent with a predetermined power target; and

    a calculator that derives a signal status output responsive to said input signal, said signal status output being communicated to said controller to override said sampling control output, wherein said signal status output indicates the occurence of a physiological event.

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