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Non-invasive blood pressure measurement system

  • US 10,052,037 B2
  • Filed: 08/05/2016
  • Issued: 08/21/2018
  • Est. Priority Date: 07/22/2010
  • Status: Active Grant
First Claim
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1. An electronic method for monitoring blood pressure of a patient, the method comprising:

  • receiving physiological electrical information associated with a patient, the physiological electrical information configured to reflect electrical activity of the patient'"'"'s heart;

    receiving a cardiac ejection information associated with the patient, the cardiac ejection information reflecting ejection of blood from the patient'"'"'s heart;

    receiving arterial pulse information associated with a limb of the patient from an acoustic sensor;

    determining an arterial pulse wave transit time (PWTT) measurement that compensates for a pre-ejection period of a cardiac cycle associated with the patient'"'"'s heart, based at least partly on the physiological electrical information, the cardiac ejection information, and the arterial pulse information;

    receiving a heart rate signal that is correlated with a set of arterial PWTT measurements, including the arterial PWTT measurement;

    determining a variability in the received heart rate signal;

    adjusting an averaging parameter for an averaging filter configured to be applied to the set of arterial PWTT measurements based on the variability;

    applying the averaging filter to the set of arterial PWTT measurements to thereby selectively reduce noise in the set of arterial PWTT measurements; and

    monitoring blood pressure of the patient based on the application of the averaging filter to the set of arterial PWTT measurements.

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