Fig. 1: Working principle and advantages of the CSPM. | Nature Communications

Fig. 1: Working principle and advantages of the CSPM.

From: A conformal piezoelectric microsystem for demographic-adaptive and calibration-free cuffless blood pressure monitoring

Fig. 1

a Schematic diagram of pulse wave propagation in a human artery and comparison of vascular morphology at different locations. b Working principle of the CSPM system, including device layout and algorithm. c Comparison of BP test results of different individuals (diverse gender, skin tone, and age) of gold standard, single-parameter and multi-parameter measurements without repeat calibration. d Comparison of BP test results of the same individual over 7 days of gold standard, single-parameter and multi-parameter measurements without repeat calibration. e Technical comparison between our device and published works utilizing photoplethysmography (PPG), ultrasound wall tracking, bioimpedance (Bio-Z), and epidermal pressure sensor for continuous BP monitoring in terms of multi-functions, accuracy, continuity, long-term tracking, and population disparities.

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