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Method for generating alarms/alerts based on a patient's posture and vital signs

  • US 10,555,676 B2
  • Filed: 05/20/2009
  • Issued: 02/11/2020
  • Est. Priority Date: 05/20/2009
  • Status: Active Grant
First Claim
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1. A method for generating an alarm while monitoring vital signs and posture of a patient, the method comprising the following steps:

  • (a) detecting a first time-dependent physiological waveform indicative of one or more contractile properties of the patient'"'"'s heart with a first sensor comprising a first detector configured to be worn on the patient'"'"'s body;

    (b) detecting a second time-dependent physiological waveform indicative of one or more contractile properties of the patient'"'"'s heart with a second sensor comprising a second detector configured to be worn on the patient'"'"'s body;

    (c) detecting a set of time-dependent motion waveforms with at least one motion-detecting sensor positioned on the patient'"'"'s torso, wherein the set of time-dependent motion waveforms are indicative of motion of the patient'"'"'s torso;

    (d) receiving and processing the first and second time-dependent physiological waveforms and the set of time-dependent motion waveforms, and generating an alarm therefrom indicative of a need for medical attention, using one or more processing components comprising a microprocessor, the one or more processing components configured to(i) process the first and second time-dependent physiological waveforms to determine at least one vital sign from the patient;

    (ii) analyze at least a portion of the set of time-dependent motion waveforms, or a mathematical derivative thereof, to determine a vector corresponding to motion of the patient'"'"'s torso;

    (iii) compare the vector to a coordinate space representative of how the motion-detecting sensor is oriented on the patient to determine a posture parameter;

    (iv) compare the posture parameter to a threshold value to estimate the patient'"'"'s posture;

    (v) compare the at least one vital sign from the patient to a predetermined alarm criteria, wherein an alarm is indicated by a variance of the vital sign relative to the predetermined alarm criteria to determine an alarm parameter; and

    (vi) generate the alarm by collectively processing the patient'"'"'s posture and the alarm parameter, wherein the alarm indicated by a variance of the vital sign relative to the predetermined alarm criteria is regulated according to the patient'"'"'s posture.

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