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Accuracy of Microlife WatchBP Office ABI monitor assessed according to the 2002 European Society of Hypertension protocol and the British Hypertension Society protocol

Saladini, Francesca; Benetti, Elisabetta; Masiero, Serena; Palatini, Paolo

doi: 10.1097/MBP.0b013e32834af72e
Devices and Technology

Objective To determine the accuracy of the WatchBP Office ABI monitor for blood pressure measurement developed by the Microlife Company.

Methods The device accuracy was tested in 85 subjects with a mean age of 54±19 years. Their systolic and diastolic blood pressure (SBP/DBP) at entry was 141±30/86±19 mmHg, and upper arm circumference was 28±5 cm. Initially, the data from 33 participants were examined according to the 2002 version of the European Society of Hypertension (ESH) protocol. An additional 52 subjects were then enrolled to fulfill the requirements of the British Hypertension Society (BHS) protocol. In all participants, sequential same arm measurements were performed by two trained observers.

Results The device passed all three phases of the ESH protocol for SBP and DBP. For the BHS protocol the device was graded A for both SBP and DBP. The A/A grade was achieved in the low blood pressure category (<130/80 mmHg), the B/A grade in the medium category (130–160/80-100 mmHg) and the A/A grade in the high category (>160/100 mmHg). Mean blood pressure difference between device and observers in the first 33 subjects was −0.9±5.5 mmHg for SBP and −2.2±4.5 mmHg for DBP and in the 85 participants it was −1.2±6.5 mmHg and −2.3±5.1, respectively.

Conclusion These data show that the Microlife WatchBP Office ABI monitor satisfied the recommended ESH accuracy levels and achieved A/A grade of the BHS protocol across a wide range of BP.

Department of Clinical and Experimental Medicine, University of Padua, Padua, Italy

Correspondence to Professor Paolo Palatini, Dipartimento di Medicina Clinica e Sperimentale, Università di Padova, via Giustiniani, 2 – 35128 Padova, Italy Tel: +39 049 821 2278; fax: +39 049 875 4179; e-mail:

Received February 2, 2011

Accepted June 24, 2011

© 2011 Lippincott Williams & Wilkins, Inc.