Low power pulse oximeter

  • US 10,433,776 B2
  • Filed: 10/29/2018
  • Issued: 10/08/2019
  • Est. Priority Date: 07/02/2001
  • Status: Active Grant
First Claim
Patent Images

1. A method of operating a patient monitor configured to monitor at least a pulse rate of a patient by processing signals responsive to light attenuated by body tissue, the method comprising:

  • operating the patient monitor according to a first control protocol, wherein said operating includes activating a first control protocol light source in accordance with the first control protocol, the first control protocol light source including one or more of a plurality of light sources;

    when operating according to the first control protocol, calculating, by the patient monitor, measurement values of the pulse rate, the measurement values responsive to light from the first control protocol light source, detected by a detector of an optical sensor after attenuation by body tissue of the patient using the patient monitor;

    generating a trigger signal, wherein generating said trigger signal is responsive to at least one of;

    a comparison of processing characteristics to a predetermined threshold, a physiological event, or signal quality characteristics of signals received from the detector;

    in response to receiving the trigger signal, operating the patient monitor according to a second control protocol different from the first control protocol, wherein said operating includes activating a second control protocol light source in accordance with the second control protocol, the second control protocol light source including one or more of the plurality of light sources; and

    when operating the patient monitor according to the second control protocol, calculating the measurement values of the pulse rate, the measurement values responsive to light from the second control protocol light source, detected by the detector after attenuation by the body tissue of the patient using the patient monitor,wherein said operating of the patient monitor according to the first control protocol operates the first control protocol light source according to a first duty cycle and said operating of the patient monitor according to the second control protocol operates the second control protocol light source according to a second duty cycle, wherein power consumption of the first control protocol light source according to the first duty cycle is different than power consumption of the second control protocol light source according to the second duty cycle.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×