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Comparison of a noninvasive 3D force sensor-based method and the invasive arterial cannula in postsurgery intensive care patients

a pilot study

Földi, Sándora; Horváth, Tamásb; Zieger, Flóraa; Sótonyi, Péterc; Cserey, Györgya

doi: 10.1097/MBP.0000000000000407
Devices and Technology

Improvement in sensing technologies is leading to new, accurate noninvasive monitoring devices. However, noninvasive continuous blood pressure (BP) monitoring still faces many challenges, such as: patient's movement, device accuracy and consistency. In this study, the accuracy of a novel noninvasive BP measuring system based on a three-axis force sensor is compared with the invasive arterial cannula taking 21 simultaneous measurements mostly on elderly, postsurgical participants. For the simultaneously recorded invasive and noninvasive signals, the similarity was high, the average correlation was 0.9001 ± 0.0588. The average differences (±SD) for simultaneously recorded systolic, diastolic and mean arterial pressures were: −9.53 ± 4.69, −0.26 ± 3.06 and 1.25 ± 2.26 mmHg, respectively. The results of diastolic and mean arterial pressure satisfy the criteria set by the Association for the Advancement of Medical Instrumentation. These results suggest that this noninvasive system could be a useful tool in continuous noninvasive BP monitoring, but still requires development.

aFaculty of Information Technology and Bionics, Pázmány Péter Catholic University

bDepartment of Hydrodynamic Systems, Faculty of Mechanical Engineering, Budapest University of Technology and Economics

cDepartment of Vascular Surgery, Semmelweis University, Budapest, Hungary

Received 5 October 2018 Accepted 13 September 2019

All authors approved the current version of the manuscript for publication.

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Correspondence to Sándor Földi, MS, Faculty of Information Technology and Bionics, Pázmány Péter Catholic University, Budapest, Hungary, Tel: +36 1 886 4771; fax: +36 1 886 4724; e-mail:

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