APPARATUS AND METHOD FOR NONINVASIVE AND CUFFLESS BLOOD PRESSURE MEASUREMENT
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United States of America Patent
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Issued Date -
Dec 8, 2016
app pub date -
May 26, 2016
filing date -
Jun 2, 2015
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Abstract
An apparatus and a method for noninvasive and caffless blood pressure measurement are provided. The apparatus includes: a photoplethysmography (PPG) amplitude calculation unit, a time difference calculation unit, a velocity calculation unit, and a calculation unit. The method includes the following steps: calculating amplitude differences between characteristic points of a PPG waveform; calculating differences between a time point of a peak of an electrocardiography (ECG) waveform and a time point of each of the characteristic points of the PPG waveform; calculating differences between time points of the characteristic points of the PPG waveform; performing calculation according to the length of a hand and an ECG-PPG time difference to obtain a pulse wave velocity (PWV);
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