Noninvasive blood pressure monitoring system and method
AssigneeGE Precision Healthcare LLC
InventorRene Coffeng
Life of this patent
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Abstract
A method of measuring noninvasive blood pressure includes determining a window for pulse detection for a patient, receiving a pressure signal measured from a measure sensor in a blood pressure cuff, and setting a pulse detection period for each heart beat based on the window and a heart beat indicator indicating at least one heart beat time for the patient. The pressure signal is then examined within each pulse detection period to identify a pressure peak therein. A blood pressure for the patient is determined based on the pressure peaks detected in the pressure signal.
Claims19
A method of measuring non-invasive blood pressure, the method comprising:
- determining, at a controller, a window for pulse detection for a patient;
- receiving, at the controller, a pressure signal measured from a pressure sensor in a blood pressure cuff;
- setting, with the controller, a pulse detection period for each heart beat based on the window, a heart beat indicator indicating at least one heart beat time, and an RR interval variability;
- examining, at the controller, the pressure signal within each pulse detection period to identify a pressure peak therein;
- controlling, with the controller, a pressure of the blood pressure cuff to maintain each of a series of cuff pressures until at least two pressure peaks are identified having an amplitude within a threshold amplitude range within each of the series of cuff pressures;
- and
- determining, at the controller, a blood pressure for the patient based on the pressure peaks.
A method of measuring non-invasive blood pressure using a blood pressure cuff, the method comprising:
- receiving an average heart rate and an RR interval variability for a patient;
- calculating a window for pulse detection based on the average heart rate and the RR interval variability;
- receiving a pressure signal measured from a pressure sensor in the blood pressure cuff;
- receiving a heart beat indicator indicating heart beat times for the patient;
- deflating the blood pressure cuff in a series of pressure steps and at each pressure step:
- (a) setting a first pulse detection period based on the window and a first heart beat time indicated by the heart beat indicator;
- (b) detecting a first pressure peak in the pressure signal within the first pulse detection period;
- (c) setting a second pulse detection period based on the window and a second heart beat time indicated by the heart beat indicator;
- (d) detecting a second pressure peak in the pressure signal within the second pulse detection period;
- (e) continuing to set pulse detection periods and detect pressure peaks until at least two pressure peaks are detected having an amplitude within a threshold amplitude range prior to a time out maximum period;
- (f) controlling deflation of the cuff to a next pressure step in the series of pressure steps;
- and
- determining a blood pressure for the patient based on the at least two pressure peaks at each pressure step.
A non-invasive blood pressure measurement system comprising:
- a blood pressure cuff comprising a pressure sensor configured to measure a pressure signal from a patient;
- a controller configured to:
- receive an RR interval variability for a patient;
- calculate a window for pulse detection based on the RR interval variability;
- set a pulse detection period for each heart beat based on the window and a heart beat indicator indicating at least one heart beat time;
- examine the pressure signal to identify a pressure peak within each pulse detection period;
- controlling a pressure of the blood pressure cuff to maintain each of a series of cuff pressures until at least two pressure peaks are identified having an amplitude within a threshold amplitude range within each of the series of cuff pressures;
- and
- determine a blood pressure for the patient based on the pressure peaks.
Dependencies are inferred from the claim text.