1. Fig. 1 From conventional cuff-based blood pressure measurement to cuff-less BP monitoring using a smartphone.
From conventional cuff-based blood pressure measurement to cuff-less BP monitoring using a smartphone. (A) Image of a conventional cuff-based oscillometric device and diagram of representative blood pressure (BP) measurement. (B) Schematic diagrams of the proposed oscillometric finger-pressing method for cuff-less BP monitoring using a smartphone, in which the user serves as the actuator instead of the cuff, to vary the external pressure of the transverse palmar arch artery by finger pressing, whereas the phone serves as the sensor to measure blood volume oscillations and applied pressure similar to a cuff, provides a visual display of the applied finger pressure over time to guide the actuation (C), and computes BP similar to a cuff (D). Image of finger anatomy adapted from (35).
Anand Chandrasekhar et al., Sci Transl Med 2018;10:eaap8674
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