An ultra-low-cost at-home blood pressure monitor that enables a smartphone to measure blood pressure SciReports UCSanDiego bloodpressure BP smartphone technology ultralowcost innovation
By Neha MathurMay 31 2023Reviewed by Lily Ramsey, LLM In a recent article published in natures Scientific Reports Journal, researchers developed a prototype of an ultra-low-cost blood pressure monitoring system called BPClip that did not require per-user calibration.
BPClip performance, as assessed in a feasibility study They performed an early feasibility study to demonstrate the potential measurement capability of the BPClip system, a low-cost blood pressure monitoring concept, among 29 study participants recruited from UC San Diego's main campus and Medical Center.
Working principle of BPClip Pressing upon the plastic clip of this device with force compresses the spring-loaded mechanism, which moves a pinhole projection closer to the smartphone camera. This, in turn, captures the pinhole size and the fluctuating brightness of the pinhole projection to measure BP.
BPClip accounted for the distance between the flashlight and the camera and used a bend in the light guide to bring the flashlight to the finger from various lengths using an optical power meter. Since finger callus and other finger conditions could lead to changes to the finger skin surface mechanics distorting the force applied by the device to the finger artery, which could distort BBClip measurement results.
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