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S. Uen, B. Weisser, H. Vetter, T. Mengden, P-25: Clinical evaluation of a wrist blood pressure device with an active positioning system by comparison with 24-H ambulatory blood pressure measurement, American Journal of Hypertension, Volume 14, Issue S1, April 2001, Page 37A, https://doi.org/10.1016/S0895-7061(01)01503-5
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Abstract
Wrist devices for self blood pressure measurement (self-BPM) are to be considered with caution due to the risk of errors when used inappropriately. The purpose of this study was to evaluate the clinical performance of a new wrist device with an active positioning system (Braun PrecisionSensor) validated according to Association for the Advancement of Medical Intrumenation (AAMI) guidelines. 20 normo- and 23 hypertensive, untreated subjects (between 23 and 81 years) with no training in self-BPM and no experience with wrist devices performed self-BPM over 7 days according to the recent Consensus guidelines. A short written instruction for the measuring technique was provided but no further instruction by the investigator was given. ABPM was performed with a highly accurate device (A&D TM 2430) validated according to AAMI and British Hypertension Society protocol. 24-h-ambulatory-BPM (ABPM; 24-h mean: 132±15/80±8 mmHg) was compared with stored data of mean self-BPM, casual screening-BPM by general physicians (GP) and multiple clinic-BPM by an experienced observer (clinic readings). Pearson correlation coefficient between self-BPM and 24-h ABPM was 0.73 for systolic (p<0.0001) and 0.65 for diastolic values (p<0.0001). Self-BPM correlated better with ABPM than casual screening-BPM by GPs (r=0.59 for syst., 0.57 for diast. values). Correlation coefficients between ABPM and the multiple clinic readings were 0.69 for syst. and 0.65 for diast. values. False classification of normotension/hypertension taking ABPM as the gold standard was 18% for wrist self-BPM (cut-off value: 135/85 mmHg) and 21% for multiple clinic readings (cut-off value: 140/90 mmHg).
Self-BPM with the Braun PrecisionSensor performed by untrained subjects showed a comparable agreement with ABPM as recently observed for self-BPM with upper-arm devices. Classification of normotension/hypertension with the wrist device tended to be more reliable as with multiple clinical readings by a trained observer.
Grant/Research
Support - Braun Gmbh, Germany
