Key result
Heart rates measured with EMFi and PVDF transducers beneath a chair or bed leg corresponded to reference ECG signals, indicating both materials are convenient for heart rate measurement.
Why the study?
Does a sensor pad with EMFi and PVDF transducers accurately measure heart rate compared to reference ECG in a person sitting or lying down?
Does a sensor pad with EMFi and PVDF transducers accurately measure heart rate compared to reference ECG in a person sitting or lying down?
EMFi and PVDF transducers placed under a chair or bed leg can provide convenient, non-intrusive heart rate measurements comparable to ECG.
May enable unobtrusive HR monitoring in seated/supine patients; leaves open clinical validation of accuracy.
In this paper we propose a new simple method to measure the heart rate of a person sitting on a chair or lying in a bed. The heart rate is measured with a thin sensor pad consisting of separate electromechanical film (EMFi) and polyvinylidenefluoride (PVDF) transducers located beneath the leg of chair or bed. This study aims to evaluate the operation of the sensor system with measurements, and also to compare the results provided by the two transducer materials. Based on the results obtained here, the heart rates measured with the transducers mainly corresponded to the values of reference ECG signal. Some minor differences between the heart rate values of PVDF and EMFi appeared, especially in supine position, possible due to the material sensitivities to different force directions. However, to conclude, both materials seem to be convenient for this kind of measurement of heart rate.
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Kärki et al. (2009) studied this question. Sensor pad with EMFi and PVDF transducers vs. Reference ECG signal was evaluated on Heart rate measurement accuracy. Heart rates measured with EMFi and PVDF transducers beneath a chair or bed leg corresponded to reference ECG signals, indicating both materials are convenient for heart rate measurement.
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