Key result
Wearable PPG and PVDF sensor refines noninvasive blood pressure and SVR measurements in swine.
Why the study?
Peripheral artery status is a key physiological indicator of response to medical conditions, motivating tracking of peripheral artery deformation via wearable sensors under pressure perturbations.
A multimodal wearable sensor combining PPG and PVDF under pressure perturbations can track peripheral artery motion and estimate systemic vascular resistance in a swine model.
Hypothesis-generating for cuff-based multimodal SVR monitoring in animals; human trials required before clinical consideration.
The status of peripheral arteries is known to be a key physiological indicator of the body's response to both acute and chronic medical conditions. In this paper, peripheral artery deformation is tracked by wearable photoplethysmograph (PPG) and piezo-electric (polyvinylidene difluoride, PVDF) sensors, under pressure-varying cuff. A simple mechanical model for the local artery and intervening tissue captures broad features present in the PPG and PVDF signals on multiple swine subjects, with respect to varying cuff pressure. These behaviors provide insight into the robustness of cardiovascular property identification by noninvasive wearable sensing. This is found to help refine noninvasive blood pressure measurements and estimation of systemic vascular resistance (SVR) using selected features of sensor amplitude versus applied pressure.
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Wang et al. (2022) studied Peripheral artery monitoring. Multimodal wearable sensor (PPG and PVDF) was evaluated on Peripheral artery deformation and systemic vascular resistance (SVR) estimation. A multimodal wearable sensor combining PPG and PVDF under a pressure-varying cuff tracked peripheral artery deformation in swine, refining noninvasive blood pressure and SVR measurements.
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