Key result
The implantable Fiber Bragg Grating sensor, coupled with a Neural Network algorithm, accurately tracked heart rate with a mean absolute error of 2.7 ± 0.7 beats per minute in isolated ovine hearts and less than 1 beat per minute in an in-vivo minipig model.
Why the study?
Continuous and reliable cardiac function monitoring could improve medication adherence in patients at risk of heart failure.
Does an implantable Fiber Bragg Grating-based soft sensor accurately track heart rate in ex-vivo and in-vivo animal models?
Does an implantable Fiber Bragg Grating-based soft sensor accurately track heart rate in ex-vivo and in-vivo animal models?
An innovative implantable Fiber Bragg Grating-based soft sensor demonstrated high accuracy in tracking heart rate in ex-vivo ovine and in-vivo minipig models, showing potential for continuous cardiac monitoring.
Accurate in animal models supports sensor refinement; leaves open human translation for cardiac monitoring.
Continuous and reliable cardiac function monitoring could improve medication adherence in patients at risk of heart failure. This work presents an innovative implantable Fiber Bragg Grating-based soft sensor designed to sense mechanical cardiac activity. The sensor was tested in an isolated beating ovine heart platform, with 3 different hearts operated in wide-ranging conditions. In order to investigate the sensor capability to track the ventricular beats in real-time, two causal algorithms were proposed for detecting the beats from sensor data and to discriminate artifacts. The first based on dynamic thresholds while the second is a hybrid convolutional and recurrent Neural Network. An error of 2.7 ± 0.7 beats per minute was achieved in tracking the heart rate. Finally, we have confirmed the sensor reliability in monitoring the heart activity of healthy adult minipig with an error systematically lower than 1 Bpm.
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Ferraro et al. (2021) studied Heart activity monitoring (n=4). Implantable Fiber Bragg Grating (FBG) sensor vs. Reference monitoring was evaluated on Heart rate tracking mean absolute error (2.7 ± 0.7 Bpm). The implantable Fiber Bragg Grating sensor, coupled with a Neural Network algorithm, accurately tracked heart rate with a mean absolute error of 2.7 ± 0.7 beats per minute in isolated ovine hearts and less than 1 beat per minute in an in-vivo minipig model.
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