Key result
HUAWEI WATCH D2 matches standard BP seated with <4% error but loses accuracy upright.
Why the study?
While wearable devices perform adequately for measuring heart rate, their reliability for blood pressure assessment remains uncertain.
Does the HUAWEI WATCH D2 smartwatch provide reliable blood pressure and heart rate measurements compared to standard reference devices in adults under seated and upright postural conditions?
Observational (n=30)
Does the HUAWEI WATCH D2 smartwatch provide reliable blood pressure and heart rate measurements compared to standard reference devices in adults under seated and upright postural conditions?
Answers are grounded in this paper and cite their sources.
Smartwatch-based blood pressure monitoring with the HUAWEI WATCH D2 shows good agreement (<4% error) with standard sphygmomanometers in the seated position, but accuracy declines significantly (up to 14% error) in the upright position, highlighting the necessity for standardized postural protocols.
Background/Objectives: Wearable devices offer a scalable approach to repeated cardiovascular assessment through ambulatory spot measurements and have demonstrated adequate performance in measuring heart rate (HR). However, their reliability for blood pressure (BP) assessment remains uncertain. This study aimed to evaluate BP and HR measurements obtained with the HUAWEI WATCH D2 smartwatch by comparison with standard reference devices under controlled postural conditions. Methods: A total of 30 participants (15 women and 15 men; age range, 21–88 years) were enrolled. One participant could not undergo smartwatch measurement because of wrist-size limitations, and measurement acquisition failed in another participant. Consequently, paired measurements obtained in the seated and upright positions were analyzed for 28 participants. Smartwatch-derived systolic BP (SBP), diastolic BP (DBP), and HR were compared with a digital sphygmomanometer, an analog sphygmomanometer, and a digital pulse oximeter. Agreement was assessed using percentage error and Bland–Altman analysis, complemented by linear regression to evaluate proportional bias. Results: In the seated position, the smartwatch showed agreement with percentage errors below 4% for SBP and DBP, with concordance coefficients indicating good agreement. In the upright position, accuracy decreased, with percentage errors up to 14%, increased variability, wider limits of agreement, and the presence of systematic and proportional discrepancies. Measurement performance was influenced by device placement, and isolated failures highlighted sensitivity to anatomical and technical factors. Conclusions: Smartwatch-based BP monitoring is feasible under controlled conditions but remains dependent on posture and measurement conditions. These findings support the use of wearable devices for scheduled spot-check cardiovascular assessment under controlled conditions and underscore the need for standardized measurement protocols before their implementation in ambulatory or long-term monitoring applications.
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Lecona et al. (2026) conducted an observational in Blood pressure and heart rate measurement assessment (n=30). HUAWEI WATCH D2 smartwatch vs. Digital sphygmomanometer, analog sphygmomanometer, and digital pulse oximeter was evaluated on Agreement of systolic blood pressure (SBP), diastolic blood pressure (DBP), and heart rate (HR) measurements with standard reference devices across seated and upright postures (Seated percentage error <4% for SBP/DBP; upright percentage error up to 14%). HUAWEI WATCH D2 showed good seated BP agreement (<4% error), though upright accuracy decreased (up to 14% error) with wider limits of agreement.
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