Patent ID: 9649054
Date: 2017-05-16
CPC Classifications: A61B

Claim:
1. A method of measuring blood pressure, the method comprising: obtaining a baseline photoplethysmograph signal from an optical sensor coupled to a measurement site of the patient before a deliberate movement of the measurement site; obtaining a motion induced photoplethysmograph signal from the optical sensor coupled with the patient at the measurement site that is in motion; obtaining a motion signal from a motion sensor coupled with the measurement site; estimating a motion component of the motion induced photoplethysmograph signal responsive to the deliberate movement based at least on the motion signal and the baseline photoplethysmograph signal; normalizing the motion portion with respect to acceleration and perfusion to generate an output normalized signal; supplying the output normalized signal into a cuff trigger module to determine whether the output normalized signal exceeds a threshold; generating a triggering signal to a blood pressure cuff based on the output normalized signal exceeding the threshold; controlling an operation of the blood pressure cuff in response to the triggering signal; and calculating, by a hardware processor, a blood pressure based on the normalized motion portion instead of deriving the blood pressure from an estimated plethysmograph portion of the motion induced photoplethysmograph signal and based on the operation of the blood pressure cuff.