Key result
Repeated auscultatory blood pressure measurements at 15-second intervals caused significant progressive changes in BP (p<0.05), whereas intervals of 30 seconds or longer did not affect precision.
Why the study?
Does the measurement interval affect the precision of repeated auscultatory blood pressure measurements?
Observational (n=37)
Does the measurement interval affect the precision of repeated auscultatory blood pressure measurements?
Repeated auscultatory blood pressure measurements require an interval of at least 30 seconds to maintain precision, suggesting that the 1-2 minute interval recommended by current guidelines may be unnecessarily long.
Supports ≥30-second intervals for precise auscultatory BP; leaves open whether guidelines should shorten from 1-2 minutes.
Objective: For repeated measurements of blood pressure (BP) using the auscultatory method, current guidelines recommend intervals of 1–2 minutes; however, evidence to support this recommendation is insufficient. In the present study, the effects of intervals among repeated BP measurements using the auscultatory method were evaluated.Methods: Systolic and diastolic BPs were measured using the auscultatory method in 37 participants. The measurements were repeated 5 times each at intervals of 15, 30, 60, 90, and 120 seconds. The changes in the BP along with the increasing the number of repetitions were assessed at each measurement interval using a linear mixed model.Results: With an increasing number of measurements, the systolic and diastolic BPs showed significant progressive decrease and increase (p < 0.05), respectively, when the measurement interval was 15 seconds. However, the precision of BP measurements was not affected by performing the measurements at intervals of 30 seconds or longer.Conclusion: Repeated BP measurements using the auscultatory method need to have an interval of at least 30 seconds, which is shorter than the intervals recommended by the current guidelines.
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Imamura et al. (2019) reported an observational. Measurement intervals of 15, 30, 60, 90, and 120 seconds vs. Other interval durations was evaluated on Changes in systolic and diastolic blood pressure with increasing number of repetitions (p=<0.05). Repeated auscultatory blood pressure measurements at 15-second intervals caused significant progressive changes in BP (p<0.05), whereas intervals of 30 seconds or longer did not affect precision.
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