Quality of blood pressure measurement in the management of arterial hypertension. Pilot study
Asmar, R.; Nisse-Durgeat, S.; el Assaad, M.; Topouchian, J.; Amah, G.; Darné, B.
Archives des Maladies du Coeur et des Vaisseaux 94(8): 885-888
2001
ISSN/ISBN: 0003-9683 PMID: 11575224 Document Number: 528543
In clinical practice, diagnosis and follow-up of hypertension is based on blood pressure (BP) as measured by auscultatory method. BP is usually measured using a stethoscope to auscultate the Korotkoff sounds and mercury or an aneroid sphygmomanometer. However due to the lack of regulatory rules, the devices are rarely checked making the quality of the measures doubtful. To compare BP measured following the WHO recommendations, using 2 different devices: the mercury or aneroid sphygmomanometer used by the physician and a SECURUS manometer that has been calibrated just before the implementation of the study. The study was performed with 1694 French general practitioners. Every physician included 2 ambulatory patients: a newly diagnosed non-treated hypertensive patient and a treated hypertensive patient. The physician was asked to include the first patient of each category attending his office. BP was measured sequentially with the 2 devices in a random order. Collected data were socio-demographic parameters, cardiovascular risk factors, hypertension related diseases, drug treatment for hypertension and BP levels. Mean BPs differ by less than 1 mmHg between the 2 devices. However 10% of the treated hypertensive patients are not classified as having normalised BP values (BP < 140/90 mmHg) or high BP values, in the same way by the 2 devices. Mean absolute difference between the 2 devices is > 5 mmHg in 22% and 13% of the physicians for SBP and DBP respectively. This pilot study emphasises the need of BP measurements of good quality in clinical practice, because of the possible impact on the care of the patients and the related costs. Regulatory rules on the control of the devices might improve the quality of BP measurements.