Numerical study to evaluate the effect of a surface-based sensor on arterial tonometry

Wookjin Lee, Jaiyoung Ryu, Hangsik Shin, Hong Sun Ryou and Seong Wook Cho

Computer Methods in Biomechanics and Biomedical Engineering, 2018, vol. 21, issue 16, 845-851

Abstract: Arterial tonometry is a widely used non-invasive blood pressure measurement method. In contrast to the cuff-based method, it is possible to obtain a continuous pressure profile with respect to systolic and diastolic pressures using this method. However, due to a requirement of arterial tonometry—that a sensor needs to be placed directly above a blood vessel—placement error is inevitable if the measurement device is only capable of measuring local regions. This study assumed that the plate sensor is flexible, thus reducing the placement error. We investigated the pressure distribution along the wrist surface rather than the local region through the contact simulation between the flexible plate sensor and the wrist. As a result, we concluded that there is a unique pressure distribution for any specific wrist, regardless of the length and position of the plate, and that it is possible to measure the blood pressure using the response at the wrist surface to the pressure inside the radial artery.

Date: 2018
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DOI: 10.1080/10255842.2018.1522533

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