Serial blood pressure measurements

Abstract

The objective of the present investigation was to study the effects of a 60-s interval of venous congestion between two noninvasive measurements of arterial blood pressure (ABP) on the fluctuation of ABP, assessed by the standard deviation of the differences between two readings. ABP was measured in 345 successive patients, at rest, four times each. For 269 participants, one pair of readings was obtained with a 60-s interval and the other pair without an interval. For 76 patients, the first pair was read at the same interval, and the second pair had venous congestion interposed and there was no waiting interval. There was no increased ABP oscillation, either when there was no interval between ABP readings, or when venous congestion was interposed compared to pairs of ABP measurements performed with a 60-s interval. There was no increase in ABP oscillations when successive ABP readings were taken without an interval or even with venous congestion interposed. Contrary to the present belief, there seems to be no loss of reliability when blood pressure recordings are taken immediately one after another, in the clinical setting.

Sources of inaccuracy in the measurement of adult patients’ resting blood pressure in clinical settings

“…Three studies were identified that investigated the effect of a shorter-than-usual interval between subsequent measures (Supplementary Table 24) [ 304 – 306 ]. Of these, only two reported the mean differences in SBP and DBP between different intervals (specifically 15 s vs. 1 min and 1 vs. 2 min), but they were not statistically significant.…”

Impact of Blood Pressure Cuff Overinflation on Blood Pressure Measurements in Adults

“…3,[6][7][8] Our study included a 30-second average rest time between measurements. Even though a 60-second rest break was not provided between consecutive blood pressure measurements in this study, a study performed by Koehler et al 29 found that serial blood pressure measurements did not significantly differ from consecutive blood pressure measurements taken with the recommended 60second rest interval, which may add to the accuracy of our measurements.…”

Diagnóstico e classificação

“…Sugere-se esperar em torno de um minuto para nova medida, embora esse aspecto seja controverso. 10,11 13. Informar os valores de pressões arteriais obtidos para o paciente.…”

“…Em cada consulta deverão ser realizadas pelo menos três me didas, sugere-se o intervalo de um minuto entre elas, embora esse aspecto seja controverso. 10,11 A média das duas últimas deve ser considerada a PA real (D). Caso as pressões sistólicas e/ou diastólicas obtidas apresentem diferença maior que 4 mmHg, deverão ser realizadas novas medidas até que se obtenham medidas com diferença inferior (D).…”