Accuracy of the SpaceLabs 90207, Novacor DIASYS 200, Del Mar Avionics Pressurometer IV and Takeda TM-2420 ambulatory systems according to British and American criteria.

Ambulatory blood pressure measurement, which has been confined to research for many years, is now an accepted investigation in clinical practice [ l ] . In an effort to ensure that the devices meet the requirements of clinical practice the British Hypertension Society (BHs) has published a comprehensive protocol for the evaluation of blood pressure measuring devices with special reference to ambulatory systems [2]. Four ambulatory systems, the SpaceIabs 90207 [3], the Novacor DIASYS 200 [4], the Del Mar Avionics Pressurometer IV [5] and the Takeda TM-2420 [6] have now been evaluated according to the BHS protocol. The evaluation was performed under standardized conditions for each ambulatory system, allowing comparison between devices.