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Robust alarm system

  • US 8,996,085 B2
  • Filed: 06/14/2011
  • Issued: 03/31/2015
  • Est. Priority Date: 10/14/2005
  • Status: Active Grant
First Claim
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1. A patient monitoring device comprising:

  • a first housing comprising;

    a driving circuit configured to drive one or more emitters;

    a front end processing circuit configured to receive a signal from a detector responsive to light from said emitters attenuated by body tissue;

    a first alarm comprising an alarm driving circuit, said first alarm configured to provide an audible alert to a caregiver;

    an alarm detector comprising a piezoelectric sensor mechanically coupled to said first alarm to detect vibrations therefrom, the alarm detector configured to determine whether said first alarm is malfunctioning;

    a circuit tester comprising an electronic circuit configured to determine whether said alarm driving circuit is malfunctioning; and

    a processor responsive to said front end processing circuit to process said signal to determine one or more measurement values for one or more physiological parameters of a patient being monitored, said processor also configured to trigger said first alarm when one or more of said measurement values should receive caregiver review;

    a second housing configured to communicate with said first housing, the second housing comprising a second processor and a second alarm configured to provide an audible alert, wherein said second processor is configured to trigger said second alarm based on a malfunction signal associated with said first alarm from at least one of said alarm detector or said circuit tester.

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