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Automated device that complies with current guidelines for office blood pressure measurement: design and pilot application study of the Microlife WatchBP Office device

Stergiou, George S.a; Lin, Che-Weib; Lin, Chia-Mingb; Chang, Shih-Lungb; Protogerou, Athanasios D.a; Tzamouranis, Dimitrisa; Nasothimiou, Efthimiaa; Tan, Ty-Minhc

doi: 10.1097/MBP.0b013e3283057a84
Devices and Technology

Objective Current guidelines for office blood pressure (BP) measurement recommend mercury devices, both arms measurement in the initial assessment and at least duplicate measurements at follow-up visits. This study presents the design and a pilot application study of an automated device that fulfils American, European, and International guidelines for office BP measurement.

Design and functions The Microlife WatchBP Office is a professional electronic mercury-free device with three function modes designed for: (a) initial assessment: triplicate automated simultaneous oscillometric both arms measurement at 60-s intervals and when there is a consistent interarm difference more than 20 mmHg systolic and/or more than 10 mmHg diastolic, the arm with the higher BP is indicated. (b) Follow-up assessment: triplicate automated oscillometric single arm measurements at 60-s intervals and their average is displayed. (c) Auscultatory measurement: by an observer using a stethoscope and a digital countdown BP display for patients with arrhythmias and other individuals in whom the oscillometric measurement is not accurate.

Pilot application study The ‘initial assessment’ mode was applied by three physicians in 63 patients (189 readings). Average interarm systolic BP difference was 0.04±5.1 mmHg and diastolic 0.4±3.2 mmHg. A value more than 10 mmHg interarm difference in nine systolic BP readings (5%) and three (2%) diastolic. No patient had a consistent interarm difference more than 10 mmHg in all three or two of the three readings.

Conclusion The Microlife WatchBP Office professional device fulfils current international requirements for office BP measurement and seems to overcome several limitations of this method when applied in clinical practice.

aHypertension Center, Third University Department of Medicine, Sotiria Hospital, Athens, Greece

bMicrolife Corporation, Nei-Hu, Taipei, Taiwan, Republic of China

cMicrolife AG, Microlife AG, Widau, Switzerland

Correspondence to Dr George S. Stergiou, MD, Hypertension Center, Third University Department of Medicine, Sotiria Hospital, 152 Mesogion Avenue, Athens 11527, Greece

Tel: +30 210 776 3117; fax: +30 210 771 9981;

e-mail: gstergi@med.uoa.gr

Received 16 January 2008 Revised 18 February 2008 Accepted 28 February 2008

© 2008 Lippincott Williams & Wilkins, Inc.