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Robust alarm system

  • US 7,962,188 B2
  • Filed: 10/12/2006
  • Issued: 06/14/2011
  • Est. Priority Date: 10/14/2005
  • Status: Active Grant
First Claim
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1. A method of providing audio or visual alarms for a patient monitor, said method executed on one or more processors of said patient monitor to provide patient monitoring functionality including determining measurements for one or more physiological parameters of a patient and when desired, alerting one or more caregivers that said measurements meet one or more predetermined conditions, said method comprising:

  • outputting a drive signal configured to cause a light source of a noninvasive sensor to emit optical radiation having at least two wavelengths into a tissue site of said patient;

    receiving a sensor signal from said sensor, said sensor signal responsive to attenuation of said optical radiation by said tissue site;

    electronically determining a physiological parameter measurement responsive to said sensor signal;

    generating an alarm trigger responsive to said physiological parameter measurement being beyond a preset limit of said physiological parameter;

    determining an availability of a first alarm, said determining comprising monitoring an alarm drive circuit associated with said first alarm to verify said circuit'"'"'s integrity; and

    activating a second alarm in response to said trigger and a determination that said first alarm is unavailable.

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