NON-INVASIVE BLOOD PRESSURE MEASUREMENT SYSTEM
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Abstract
A system for non-invasively determining an indication of an individual'"'"'s blood pressure is described. In certain embodiments, the system calculates pulse wave transit time using two acoustic sensors. The system can include a first acoustic sensor configured to monitor heart sounds of the patient corresponding to ventricular systole and diastole and a second acoustic sensor configured to monitor arterial pulse sounds at an arterial location remote from the heart. The system can advantageously calculate a arterial pulse wave transit time (PWTT) that does not include the pre-ejection period time delay. In certain embodiments, the system further includes a processor that calculates the arterial PWTT obtained from the acoustic sensors. The system can use this arterial PWTT to determine whether to trigger an occlusive cuff measurement.
218 Citations
33 Claims
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1-8. -8. (canceled)
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9. A system for monitoring blood pressure of a patient, the system comprising:
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a blood pressure analyzer comprising one or more processors, the blood pressure analyzer configured to; receive an electrocardiograph (ECG) signal from an ECG sensor coupled with a patient, receive a cardiac ejection signal from a second sensor coupled with the patient, the cardiac ejection signal configured to reflect ejection of blood from the patient'"'"'s heart, receive a pulse signal from an acoustic sensor coupled with a limb of the patient, and determine an arterial pulse wave transit time (PWTT) based at least partly on the ECG signal, the cardiac ejection signal, and the pulse signal; and a non-invasive blood pressure module configured to trigger an occlusive blood pressure cuff to obtain a blood pressure measurement from the patient responsive to a change in the arterial PWTT. - View Dependent Claims (10, 16, 17, 18)
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11-15. -15. (canceled)
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19. A method for monitoring blood pressure of a patient, the method comprising:
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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; and 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; wherein at least said determining is performed by one or more processors. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification