Validation of two pulse transit time‐based blood pressure measurement devices (1 April 2019)

Summary

Blood pressure (BP) has been measured with a cuff for over a 100 years. Recently, ‘tricorders’ and smartwatches that measure BP without a cuff using pulse transit time (PTT) have become available. These BP measurements are based on the inverse relationship between BP and PTT. PTT can be measured as the timing delay in a QRS complex on an EKG and the onset of a photoplethysmography wave, for example measured from a finger. Since these measurements are relatively more user‐friendly than conventional cuff‐based measurements they may aid in more frequent BP monitoring.

Using a guidelines‐based protocol, Bard et al. investigated the accuracy and precision of two popular PTT‐based BP measuring devices: the Everlast TR10 fitness watch (Everlast, New York City, NY) and the BodiMetrics tricorder (BodiMetrics, Manhattan Beach, CA).