QVALIDATION OF THE WELCH-ALLYN QUIETTRAK AMBULATORY BLOOD-PRESSURE MONITOR IN PREGNANCY

Objective: To assess the accuracy of the Welch Allyn QuietTrak ambulat ory blood pressure monitor in pregnancy. Method: The QuietTrak ambulat ory blood pressure monitor was validated for accuracy using the protoc ol of the British Hypertension Society (BHS). Results: The machine ach ieved a grade B for systolic and diastolic blood pressure according to the BHS grading criteria. The mean difference (standard deviation) be tween observer and machine for systolic was 0.34 mm Hg (9 mm Hg) and f or diastolic was -1.6 mm Hg (8 mm Hg). Conclusions: The Welch Allyn Qu ietTrak ambulatory blood pressure monitor is accurate for use in pregn ancy according to BHS and narrowly failed the criteria of the Associat ion for the Advancement of Medical Instrumentation (AAMI) criteria.