Key result
Novel dual-method automatic BP monitor correlates closely with auscultation at r ~0.98 for systolic pressure.
Why the study?
The oscillometric and Korotkoff sound methods are common for blood pressure measurement, but combining both in an automatic device for improved accuracy was unexplored.
Does a new automatic blood pressure measurement device using both oscillometric and Korotkoff sound methods accurately measure blood pressure compared to the traditional auscultatory method in human subjects?
Cross-Sectional (n=15)
Does a new automatic blood pressure measurement device using both oscillometric and Korotkoff sound methods accurately measure blood pressure compared to the traditional auscultatory method in human subjects?
A novel automatic blood pressure device combining oscillometric and Korotkoff sound methods demonstrates high accuracy and correlation with traditional auscultatory measurements.
Answers are grounded in this paper and cite their sources.
Small validation study supports dual-method BP device feasibility; leaves open larger trials before clinical adoption.
The oscillometric method and Korotkoff sound method are the most common ways to measure the blood pressure. A new automatic blood pressure measurement device, which uses both oscillometric method and Korotkoff method, was developed. A pressure sensor was used to obtain cuff pressure and oscillation signal, and a microphone was used to detect Korotkoff sounds. Forty-five measurements from fifteen subjects were used for analysis. Correlation coefficients between the traditional auscultatory method and Korotkoff sound method were 0.9820 and 0.9721 for the systolic and diastolic blood pressure values, respectively. Standard deviations of differences for the systolic and diastolic blood pressure values were 1.3019 and 1.4495, respectively. Correspondingly, correlation coefficients between the traditional auscultatory method and oscillometric method using newly developed algorithm were 0.9651 and 0.9136 for the systolic and diastolic blood pressure values, with the standard deviations of 1.42 and 1.73, respectively. The results showed that the newly developed algorithm for oscillometirc method provide accurate blood pressure values, moreover, Korotkoff sound method using microphone provides even higher accuracy. Therefore, a new automatic device which utilizes both oscillometric method and Korotkoff sound method would provide the accurate and reliable blood pressure values.
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Wei et al. (2012) conducted a cross-sectional in Healthy (blood pressure measurement) (n=15). Automatic blood pressure measurement device combining oscillometric and Korotkoff sound methods vs. Traditional auscultatory method was evaluated on Correlation of systolic blood pressure values between the combined method device and traditional auscultatory method (r = 0.9842). A new automatic blood pressure device combining oscillometric and Korotkoff sound methods showed high correlation with the traditional auscultatory method (r=0.9842 for systolic, r=0.9862 for diastolic).
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