Sensors 2013, 13(11), 14797-14812; doi:10.3390/s131114797
Article

Comparison of Systolic Blood Pressure Values Obtained by Photoplethysmography and by Korotkoff Sounds

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Received: 2 September 2013; in revised form: 8 October 2013 / Accepted: 25 October 2013 / Published: 31 October 2013
(This article belongs to the collection Sensors for Globalized Healthy Living and Wellbeing)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: In the current study, a non-invasive technique for systolic blood pressure (SBP) measurement based on the detection of photoplethysmographic (PPG) pulses during pressure-cuff deflation was compared to sphygmomanometry—the Korotkoff sounds technique. The PPG pulses disappear for cuff-pressures above the SBP value and reappear when the cuff-pressure decreases below the SBP value. One hundred and twenty examinations were performed on forty subjects. In 97 examinations the two methods differed by less than 3 mmHg. In nine examinations the SBP value measured by PPG was higher than that measured by sphygmomanometry by 5 mmHg or more. In only one examination the former was lower by 5 mmHg or more than the latter. The appearance of either the PPG pulses or the Korotkoff sounds assures that the artery under the cuff is open during systolic peak pressure. In the nine examinations mentioned above the PPG pulses were observed while Korotkoff sounds were not detected, despite the open artery during systole. In these examinations, the PPG-based technique was more reliable than sphygmomanometry. The high signal-to-noise ratio of measured PPG pulses indicates that automatic measurement of the SBP by means of automatic detection of the PPG signals is feasible.
Keywords: systolic blood pressure; sphygmomanometry; Korotkoff sounds; photoplethysmography; accuracy
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MDPI and ACS Style

Nitzan, M.; Adar, Y.; Hoffman, E.; Shalom, E.; Engelberg, S.; Ben-Dov, I.Z.; Bursztyn, M. Comparison of Systolic Blood Pressure Values Obtained by Photoplethysmography and by Korotkoff Sounds. Sensors 2013, 13, 14797-14812.

AMA Style

Nitzan M, Adar Y, Hoffman E, Shalom E, Engelberg S, Ben-Dov IZ, Bursztyn M. Comparison of Systolic Blood Pressure Values Obtained by Photoplethysmography and by Korotkoff Sounds. Sensors. 2013; 13(11):14797-14812.

Chicago/Turabian Style

Nitzan, Meir; Adar, Yair; Hoffman, Ellie; Shalom, Eran; Engelberg, Shlomo; Ben-Dov, Iddo Z.; Bursztyn, Michael. 2013. "Comparison of Systolic Blood Pressure Values Obtained by Photoplethysmography and by Korotkoff Sounds." Sensors 13, no. 11: 14797-14812.

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