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