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Pulse oximeter probe-off detector

  • US 8,532,728 B2
  • Filed: 12/29/2008
  • Issued: 09/10/2013
  • Est. Priority Date: 03/25/1999
  • Status: Expired due to Fees
First Claim
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1. In a patient monitor configured to obtain signals responsive to physiological parameters of a monitored patient, a detector for determining when a physiological sensor may not be properly attached to said monitored patient with respect to a measurement site, the detector comprising:

  • a limit selector configured to output a signal strength limit in response to a sensitivity mode wherein the signal strength limit is selectable by a user from two or more predetermined sensitivity modes; and

    logic configured to indicate that a sensor not properly attached condition exists based on a comparison of a signal strength of one or more signals indicative of one or more physiological parameters and the signal strength limit;

    wherein the logic is further configured to indicate that a sensor not properly attached condition exists when a pulse rate density indicates that one or more of said signals are valid, and when the signal strength is below the signal strength limit.

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