Validade de um monitor digital de pulso para mensuração de pressão arterial em comparação com um esfigmomanômetro de mercúrio

Abstract

Background: Valid measurements of blood pressure, both at clinical and community settings, are essential for monitoring this variable at the population level.Objective: To evaluate the validity of a wrist digital monitor for measuring blood pressure among adolescents in comparison to a mercury sphygmomanometer.Methods: A validation study was carried out in the city of Pelotas, Southern Brazil. Blood pressure was measured twice using two different sphygmomanometers; an OMRON wrist digital and a desktop BD mercury one. Half of the sample was measured first with the digital manometer and subsequently with the mercury one, whereas the remaining half was evaluated in the opposite order. Agreement between both measures was evaluated using the Bland and Altman method.Results: 120 adolescents aged 14 to 15 years were included (50% of each sex). Mean systolic blood pressure among boys was 113.7 mmHg (SD 14.2) when using the mercury manometer and 115.5 mmHg (SD 15.2) when using the digital one. Equivalent values for diastolic blood pressure were 61.5 mmHg (SD 9.9) and 69.6 mmHg (10.2), respectively. Among girls, the mean systolic blood pressure was 104.7 mmHg (SD 10.1) when using the mercury manometer and 102.4 mmHg (SD 11.9) when using the digital device. Values for diastolic blood pressure were 60.0 mmHg (SD 10.4) and 65.7 mmHg (SD 7.7), respectively. Conclusions:The digital device showed a high level of agreement with the mercury manometer when measuring systolic blood pressure. The level of agreement was lower for diastolic blood pressure. The use of correction equations may be an alternative for studies using this wrist digital monitor in adolescent patients. ( 3,4 . It seems that this type of equipment can replace the others in some contexts, such as at home or in epidemiological studies within the community 5 . However, most studies so far included only adults, and therefore, the validity of these methods among adolescents in unclear.The aim of the present study was to test the validity of a wrist digital monitor against that of a mercury sphygmomanometer -the gold standard -in a convenience sample of adolescents living in Pelotas, southern Brazil. MethodsA sample of 120 adolescents aged 14 to 15 years from five public schools of the city had their blood pressure measured with two different sphygmomanometers -a desktop BD IntroductionAn accurate assessment of blood pressure is very important for the diagnosis and treatment of hypertension. The importance of attaining the diagnosis of high blood pressure and its continuous monitoring are well known. Therefore, several equipments have been available for the measurement of blood pressure, not only to be used by specialized individuals, but also by the population itself. In this sense, wrist digital monitors have been increasingly used, instead of mercury and aneroid devices, which require a trained professional to operate them 1,2 .Although digital monitors are much easier to use when compared to the mercury sphygmomanometers, it is 345Original Article mercur...

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