title: A comparison of blood pressure measurements obtained with the Dinamap 845XT, the standard mercury sphygmomanometer and the London School of Hygiene device.
abstract: Blood pressure measurements obtained with the Dinamap 845XT Vital Signs monitor were compared with measurements obtained with a standard mercury sphygmomanometer and a London School of Hygiene mercury sphygmomanometer in a group of 31 normotensive and hypertensive subjects. The experimental design allowed reading to be taken with all 3 devices at approximately the same time. 12 sets of readings were obtained with each device in each subject. Although inter-device differences estimated from analysis of variance were small (less than 2 mmHg after allowing for calibration differences) differences between measurements taken simultaneously with the 3 devices were often substantial. Agreement between the two mercury sphygmomanometers was better than that between either sphygmomanometer and the Dinamap. This may be a reflection of fundamental differences between auscultatory and oscillometric measurements. Differences between devices were unrelated to blood pressure level. The observed variability within subjects was similar with each device.
authors.affiliation: Department of Medicine, University of Western Australia, Perth.
authors.forename: D A
authors.initials: DA
authors.lastname: Jenner
authors.forename: L J
authors.initials: LJ
authors.lastname: Beilin
authors.forename: R
authors.initials: R
authors.lastname: Vandongen
authors.forename: N H
authors.initials: NH
authors.lastname: DeKlerk
mesh_terms: D000328:Adult; D001795:Blood Pressure Determination / Q000295:instrumentation*; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male