CSEM's wearable PPG-based cuffless BP monitor showed high concordance (83% for SBP, 86% for DBP) with an oscillometric device in tracking BP changes over 6 weeks.
Observational (n=30)
No
Does a wearable cuffless PPG blood pressure monitor accurately track blood pressure changes over 6 weeks compared to a validated oscillometric monitor in treated hypertensive patients?
A wearable cuffless PPG-based blood pressure monitor demonstrated stable and concordant tracking of blood pressure changes over 6 weeks compared to a standard oscillometric device in treated hypertensive patients.
Objective: Blood pressure (BP) monitoring is undergoing a paradigm shift with the rapid growth of cuffless tech-nologies. Scientific societies have emphasized that these technologies must reliably track short- and long-term BP changes to support clinical decision-making. This study investigates the stability of BP estimation over a 6-week period using the CSEM's wearable cuffless photoplethysmographic (PPG) BP monitor, as well as its agreement with a validated oscillometric monitor (Microlife WatchBP Home A) in tracking BP changes in treated hypertensive patients. Design and method: In this monocentric prospective observational study, each participants attended 4 visits at the hypertension clinic over six weeks. During each visit, BP was estimated as the mean of 5 to 7 consecutive measurements performed with both the cuff-based (Cuff-BP) and cuffless (PPG-BP) devices on contra-lateral upper arms. Between-visit systolic and diastolic BP changes (δSBP and δDBP) were assessed for all patients and compared in terms of the mean ± standard deviation of the differences between the devices. The concordance rate (CR), defined as the percentage of significant BP changes (δSBP>15mmHg, δDBP>10mmHg) showing a concordant direction of change between both devices, was also assessed. Inter-device differences were compared between visits to evaluate the stability of PPG-BP estimations. Results: Thirty participants (18/30 female; 54 ± 17 years old; BMI: 29.2 ± 5.5 kg/m2) were included. Mean SBP and DBP at the first visit were respectively 134 ± 18 mmHg and 83 ± 11 mmHg. The mean differences between Cuff-BP and PPG-BP did not differ significantly across visits 2 to 4, suggesting stability of PPG-BP estimation over time. The agreement between Cuff-BP and PPG-BP was 0.5 ± 12.2 mmHg for δSBP and 0.0 ± 7.4 mmHg for δDBP. The CR on significant BP changes was 83% for SBP and 86% for DBP. Conclusions: CSEM's wearable PPG-based cuffless BP monitor shows concordant tracking of week-to-month BP changes during antihypertensive therapy compared to an oscillometric device. These promising results, if confirmed over a larger sample size and against a gold-standard BP reference, could lead to a break-through in hypertension management.
Rigon et al. (Fri,) conducted a observational in Hypertension (n=30). CSEM's wearable cuffless photoplethysmographic (PPG) BP monitor vs. Validated oscillometric monitor (Microlife WatchBP Home A) was evaluated on Agreement and concordance rate of between-visit systolic and diastolic BP changes. CSEM's wearable PPG-based cuffless BP monitor showed high concordance (83% for SBP, 86% for DBP) with an oscillometric device in tracking BP changes over 6 weeks.