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Inflationary oscillometric blood pressure monitoring: validation of the OMRON-MIT

Golara, Moneli; Jones, Clare; Randhawa, Manjit; Shennan, Andrew H.

Devices and Technology

Background To evaluate the accuracy of the OMRON-MIT, (an automated inflationary oscillometric blood pressure monitoring device) for use in the general population by direct comparison to standard auscultatory mercury sphygmomanometry.

Design Two trained, blinded observers taking simultaneous blood pressure measurements alternating between a mercury sphygmomanometer and the OMRON-MIT.

Methods The evaluation was carried out according to the revised British Hypertension Society protocol. The validation data was also classified by the American Association for the Advancement of Medical Instrumentation (AAMI).

Results The OMRON-MIT device achieved a BHS grade A for both systolic blood pressure (SBP) and diastolic blood pressure (DBP). It also met the criteria for the AAMI protocol, the mean difference between the MIT and standard was −2.0 ± 7 mmHg for SBP and −2.0 ± 6 mmHg for DBP.

Conclusions Inflationary oscillometry is a valid technique for the measurement of blood pressure. The OMRON-MIT, which uses this technique, is accurate and can be recommended for clinical use in the adult population.

Maternal and Foetal Research Unit, GKT School of Medicine, St. Thomas' Hospital, Lambeth Palace Road, London, UK

Correspondence and requests for reprints to Mr. A. Shennan, Senior Lecturer, Maternal and Foetal Research Unit, St. Thomas' Hospital, Lambeth Palace Road, London, SE1 7EH, UK.

Tel: +44 207 960 5740; fax: +44 207 620 1227; e-mail:

Potential conflicts of interest: none

Received 29 May 2002 Revised 09 September 2002 Accepted 11 September 2002

© 2002 Lippincott Williams & Wilkins, Inc.