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Sensors 2017, 17(7), 1541;

Hybrid Optical Unobtrusive Blood Pressure Measurements

Philips Research Eindhoven, 5656 AE Eindhoven, The Netherlands
Department of Electrical Engineering, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
Author to whom correspondence should be addressed.
Received: 21 April 2017 / Revised: 15 June 2017 / Accepted: 28 June 2017 / Published: 1 July 2017
(This article belongs to the Section Physical Sensors)
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Blood pressure (BP) is critical in diagnosing certain cardiovascular diseases such as hypertension. Some previous studies have proved that BP can be estimated by pulse transit time (PTT) calculated by a pair of photoplethysmography (PPG) signals at two body sites. Currently, contact PPG (cPPG) and imaging PPG (iPPG) are two feasible ways to obtain PPG signals. In this study, we proposed a hybrid system (called the ICPPG system) employing both methods that can be implemented on a wearable device, facilitating the measurement of BP in an inconspicuous way. The feasibility of the ICPPG system was validated on a dataset with 29 subjects. It has been proved that the ICPPG system is able to estimate PTT values. Moreover, the PTT measured by the new system shows a correlation on average with BP variations for most subjects, which could facilitate a new generation of BP measurement using wearable and mobile devices. View Full-Text
Keywords: unobtrusive BP measurement; photoplethysmography; imaging photoplethysmography; pulse transit time unobtrusive BP measurement; photoplethysmography; imaging photoplethysmography; pulse transit time

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Zhang, G.; Shan, C.; Kirenko, I.; Long, X.; Aarts, R.M. Hybrid Optical Unobtrusive Blood Pressure Measurements. Sensors 2017, 17, 1541.

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