Hybrid optical unobtrusive blood pressure measurements

G. Zhang, C. Shan, I. Kirenko, X. Long, R.M. Aarts

Research output: Contribution to journalArticleAcademicpeer-review

15 Citations (Scopus)
216 Downloads (Pure)


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.
Original languageEnglish
Article number1541
Pages (from-to)1-15
Number of pages15
Issue number7
Publication statusPublished - 1 Jul 2017


  • Imaging photoplethysmography
  • Photoplethysmography
  • Pulse transit time
  • Unobtrusive BP measurement


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