A comparison of probes based on Bragg grating sensor and microphones for heart sounds measurement

R. Martinek; J. Brablik; L. Soustek; J. Kolarik; M. Fajkus; J. Nedoma; R. Kahankova

doi:10.1117/12.2325744

8 October 2018 A comparison of probes based on Bragg grating sensor and microphones for heart sounds measurement

R. Martinek, J. Brablik, L. Soustek, J. Kolarik, M. Fajkus, J. Nedoma, R. Kahankova

Proceedings Volume 10801, Optical Materials and Biomaterials in Security and Defence Systems Technology XV; 108010G (2018) https://doi.org/10.1117/12.2325744
Event: SPIE Security + Defence, 2018, Berlin, Germany

Abstract

This paper presents the comparison of fibre-optic Bragg Grating Sensor with the commercially available probes for heart sounds measurement based on microphones. The analysis of the sensitivity and specificity was carried out to assess the efficacy of the individual measuring probes. Since fibre-optic sensing uses light in optical fibre rather than electricity, it solves the limitations of electrical sensors such as transmission loss and susceptibility to electromagnetic interference (EMI). Experimental results have shown that Fibre-Optic Bragg Grating Sensor significantly outperforms the devices using the microphones. Moreover, the sensor embedded in polydimethylsiloxane polymer and is fixed on the thorax by means of elastic belt. The material is biocompatible and immune to electromagnetic interference, which is major advantage for the healthcare environment. The probe dimensions are small; therefore, it would be convenient for the patient and easily implemented into clinical practice. Nevertheless, the signal processing methods must be applied to separate the desired signal from the environmental noise.

Citation Download Citation

R. Martinek, J. Brablik, L. Soustek, J. Kolarik, M. Fajkus, J. Nedoma, and R. Kahankova "A comparison of probes based on Bragg grating sensor and microphones for heart sounds measurement", Proc. SPIE 10801, Optical Materials and Biomaterials in Security and Defence Systems Technology XV, 108010G (8 October 2018); https://doi.org/10.1117/12.2325744

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