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Vital sign monitoring: a practical solution by a MR compatible phonocardiography interferometric probe

J. NEDOMA1,* , S. KEPAK1, J. CUBIK1, J. FRNDA2, M. DURICA2, M. FAJKUS1, R. MARTINEK3

Affiliation

  1. Department of Telecommunications, Faculty of Electrical Engineering and Computer Science, VSB - Technical University of Ostrava, 17 listopadu 15/2172, 708 33 Ostrava, Czech Republic
  2. Department of Quantitative Methods and Economic Informatics, Faculty of Operation and Economics of Transport and Communications, University of Zilina, Univerzitna 1, 010 26 Zilina, Slovakia
  3. Department of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VSB - Technical University of Ostrava, 17. listopadu 15/2172, 708 33 Ostrava, Czech Repub

Abstract

This paper deals with the description of S1-S1 interval detection of the phonocardiographic signal obtained by a fiber-optic Mach-Zehnder interferometer. A non-invasive measuring probe encapsulated in a bicomponent (base and catalyst) entitled Zhermack ZA 50 LT was designed. The probe is immune to the electromagnetic interferences (EMI) and therefore can be operated under strong magnetic fields. The laboratory results (obtained from 8 volunteers) were compared to the reference electrocardiograph (ECG) signal and evaluated by an objective Bland-Altman (B-A) method. Based on the results, it is possible to say that the S1-S1 interval detection with the presented fiber-optic interferometric probe is as reliable as the measurement of time between the R-R wave of the ECG signal since the B-A analysis resulted in 95.59 % samples laid in ± 1.96 SD. The test carried out in a real Magnetic Resonance Imaging (MRI) environment demonstrated that the presence of the probe in the MRI scanner does not affect the quality of this imaging modality. The developed sensor can be suitable for cardiac triggering..

Keywords

Fiber-optic sensor, Interferometer, Physiological parameters monitoring.

Submitted at: May 16, 2019
Accepted at: Dec. 10, 2019

Citation

J. NEDOMA, S. KEPAK, J. CUBIK, J. FRNDA, M. DURICA, M. FAJKUS, R. MARTINEK, Vital sign monitoring: a practical solution by a MR compatible phonocardiography interferometric probe, Journal of Optoelectronics and Advanced Materials Vol. 21, Iss. 11-12, pp. 656-662 (2019)