Evaluation of printed P(VDF-TrFE) pressure sensor signal quality in arterial pulse wave measurement

Laurila, Mika-Matti; Peltokangas, Mikko; Montero, Karem Lozano; Siponkoski, Tuomo; Juuti, Jari; Tuukkanen, Sampo; Oksala, Niku; Vehkaoja, Antti; Mäntysalo, Matti (2019-08-13)
 
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https://doi.org/10.1109/JSEN.2019.2934943

Laurila, Mika-Matti
Peltokangas, Mikko
Montero, Karem Lozano
Siponkoski, Tuomo
Juuti, Jari
Tuukkanen, Sampo
Oksala, Niku
Vehkaoja, Antti
Mäntysalo, Matti
Institute of Electrical and Electronics Engineers
13.08.2019

M. Laurila et al., "Evaluation of Printed P(VDF-TrFE) Pressure Sensor Signal Quality in Arterial Pulse Wave Measurement," in IEEE Sensors Journal, vol. 19, no. 23, pp. 11072-11080, 1 Dec.1, 2019. doi: 10.1109/JSEN.2019.2934943

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doi:https://doi.org/10.1109/JSEN.2019.2934943
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https://urn.fi/URN:NBN:fi-fe2019092029159
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Abstract

In this contribution, we evaluate the performance of an additively fabricated piezoelectric poly(vinylidenefluoride-cotrifluoroethylene) (P(VDF-TrFE)) based dynamic pressure sensor in non-invasive arterial pulse wave (PW) measurement. Additively fabricated piezoelectric sensors have high potential for the realization of affordable and unobtrusive PW measurement systems which could enable the long-term monitoring of patients with cardiovascular diseases (CVDs). However, the accuracy and reliability of such sensors have not been extensively studied before. We propose an additive fabrication process for a P(VDF-TrFE) PW-sensor, measure PW from the radial artery at the wrist from 22 healthy volunteer subjects, calculate clinically relevant parameters based on the PW waveform and compare their values to the values obtained from concurrent measurement with an electromechanical film (EMFi) based reference sensor, used earlier in several clinical studies. We show that the signals recorded with the two sensors, as well as the radial augmentation index (rAIx) and the stiffness index (SI) calculated from them, are in good agreement with each other. These results demonstrate that the additively fabricated P(VDF-TrFE) PW sensors can reach a suitable level of accuracy and reliability for clinical use.

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