The Accuracy of Blood Pressure Monitoring Using the Senbiosys Ring: A Study on Patients Undergoing Coronary Angiography and Patients in the Intensive Care Unit

The study NCT04379986 aims at evaluating the performance of the Senbiosys technology in monitoring blood pressure (BP) values for elderly patients: 25 patients undergoing coronary angiography, aged 68.92 ± 6.41 years, and 10 patients in the intensive care unit (ICU), aged 71.90 ± 8.56 years. The technology is based on pulse wave analysis (PWA) of low-power photoplethysmography (PPG) from the SBF2003 ring. The PPG recordings are processed by the PPG-based blood pressure monitoring (PPG-BPM) algorithm 1 to generate systolic BP (SBP) and diastolic BP (DBP) estimates. For the SBP, the mean difference ± standard deviation between the reference arterial line and the PPG-BPM values is 0 ± 5.06 mmHg for the patients undergoing coronary angiography and 0 ± 7.46 mmHg for the patients in the ICU. For the DBP, the mean difference ± standard deviation between the reference arterial line and the PPG-BPM values is 0 ± 1.85 mmHg for the patients undergoing coronary angiography and 0 ± 4.17 mmHg for the patients in the ICU. The results show that the accuracy of our algorithm is within the 5 ± 8 mmHg ISO/ANSI/AAMI protocol requirement.