Clinical validation of aneroid sphygmomanometer.
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Date
2012-07
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Abstract
Recent concerns about the mercury toxicity and its ill effects on
the environment and health has led to widespread use of aneroid
manometers. Present study was conducted to analyse whether this change
would lead to any systematic shift in measured blood pressure or consistency
of blood pressure measurement in clinical setting. The clinical accuracy of
the Welch Allyn aneroid sphygmomanometer model 7670-04 was studied
against the mercury sphygmomanometer on 83 volunteers from Dehradun.
Two blood pressure reading of each study subject was recorded with pretested
instruments (aneroid and mercury sphygmomanometer). Data
analysis showed the difference of means between the reading of two devices
against mean of the observer reading for both systolic (-3.62±4.88) and
diastolic (-2.36±3.77) blood pressure were not statistically different. The
corresponding values of the SBP and DBP from both the instruments
showed significant correlation. Regression analysis of mercury versus
aneroid showed regression line (Y = 9.52 + 0.95X for SBP, Y = 0.36 + 0.96X
for DBP) significantly different from line of equality (P<0.001). The study
has demonstrated that the aneroid device (model: 7670-04) achieved grade
B performance according to the British Hypertensive Society criteria.
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Keywords
SBP : systolic blood pressure, DBP : diastolic blood pressure, aneroid
Citation
Saxena Yogesh, Saxena Vartika, Gupta Rani. Clinical validation of aneroid sphygmomanometer. Indian Journal of Physiology and Pharmacology. 2012 Jul-Sept; 56(3): 255-261.