Accuracy of the SpaceLabs 90207 ambulatory blood pressure measuring system in normotensive pregnant women determined by the British Hypertension Society protocol.

The SpaceLabs 90207 monitor (Redmond, Washington, USA) for ambulatory blood pr-nue measurement u-as evaluated according to the protocol of the British Hypertension Society (BHS) 111 in normotmsive pregnant women. We have previously evaluated the SpaceLabs 90207 in nonnotmsive and hypertensive men and non-pregnant women according to the BHS protocol (21, In this evaluation the device achieved B gnding for systolic and diasoiic pressure and fulfilled the criteria of the Association for the Advancement of Medical Instrumentarion W) 131. three sequential measurements were performed in the same arm with the Spacehbs 90207 and a standard mercury sphvgmomanometer using Korotkoff phase v (disappearance of sounds) for diastolic pressure. The mean and standard deviation of the first mercury sphygmomanometer measurements were (systoliddiastolic) 1121 1/6&12 mrn~g. The SpaceLabs 90207 =as grad4 A for systolic and C for diastolic pressure according to the BHS protocol (Table 1). ~pplying the AMlI accuracy criteria 141, the SpaceLabs 90207 W e d the requirement for systolic but not diastolic p m , mean differences being 524 for systolic and mmHg for phase V diastolic pressurr.