The Effect of BP Measurement Velocity on Noninvasive BP Measurement Value Was Studied by Establishing the Blood Pressure Measurement Running Model
Science Discovery
Volume 7, Issue 3, June 2019, Pages: 165-171
Received: Apr. 11, 2019; Published: Jun. 15, 2019
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Authors
Du Xuelian, Beijing Electric Power Hospital, Beijing, China
Wang Bingtao, Beijing Electric Power Hospital, Beijing, China
Wang Baiyan, Beijing Electric Power Hospital, Beijing, China
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Abstract
Objective Through the establishment of blood pressure measurement running model, the relationship between the blood pressure measurement velocity and the noninvasive blood pressure measurement value was calculated, then the accuracy of noninvasive blood pressure measurement was evaluated. Methods First, the basis of establishing the blood pressure measurement running model: the origin and nature of the blood pressure auscultation sound (BPAS) which was also confirmed as the main component of Korotkoff-sound was determined by the resonance theory of blood pressure measurement and its confirming experiments from the perspective of evidence-based medicine. The BPAS was a vibration sound which coming from the vibration of closing mitral valve and being homologous with the first heart sound and also possessing resonant nature. It was located between the first heart sound and the second heart sound on the synchronization graph of artery and heart, this meant that the Korotkoff-sound was a sound of systolic period in cardiac cycle; Second, establishing the blood pressure measurement running model: the cardiac cycle was divided into 6 equal parts in which 3 ones were in systolic period and another 3 ones were in diastolic period, then 6 pressure measurement lines were imagined and the speed that the gas flow out of the cuff was in control from 1-10mmHg/per beating and the systolic pressure measurement value was calculated using mathematical methods, the principle of value reading was to use round figure; In final, setting up the ideal tested individuals: imagining the individual's systolic pressure of each beating was always 130mmHg, the heart rate was 60/min. Results When the blood pressure measurement velocity was 1mmHg/per beating, two numbers of 130 and 129mmHg were calculated; when the velocity was 2 to 3mmHg/per beating, three numbers of 130,129 and 128mmHg were calculated; when the velocity was 4 to 5mmHg/per beating, five numbers from 130 to 126mmHg were calculated; when the velocity was 10mmHg/per beating, nine numbers from 130 to 122mmHg were calculated; Conclusion The faster the blood pressure measurement velocity was, the wider the range of blood pressure measurement value was, and then the greater the measurement error was. The blood pressure measurement velocity can greatly affect the systolic blood pressure measurement value ,and this is also an important factor of fluctuation in blood pressure.
Keywords
Blood Pressure Measurement Velocity, Blood Pressure Measurement Value, Blood Pressure Measurement Running Model, Blood Pressure Auscultation Sound, Resonance Theory, Phonoarteriogram, Phonocardiogram
To cite this article
Du Xuelian, Wang Bingtao, Wang Baiyan, The Effect of BP Measurement Velocity on Noninvasive BP Measurement Value Was Studied by Establishing the Blood Pressure Measurement Running Model, Science Discovery. Vol. 7, No. 3, 2019, pp. 165-171. doi: 10.11648/j.sd.20190703.16
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