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Continuous monitoring of deep-tissue haemodynamics with stretchable ultrasonic phased arrays

Harvard Dataverse (Africa Rice Center, Bioversity International, CCAFS, CIAT, IFPRI, IRRI and WorldFish)

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Title Continuous monitoring of deep-tissue haemodynamics with stretchable ultrasonic phased arrays
 
Identifier https://doi.org/10.7910/DVN/EPITIY
 
Creator Wang, Chonghe
 
Publisher Harvard Dataverse
 
Description Stretchable wearable devices for the continuous monitoring of physiological signals from deep tissues are constrained by the depth of signal penetration and by difficulties in resolving signals from specific tissues. Here, we report the development and testing of a prototype skin-conformal ultrasonic phased array for the monitoring of haemodynamic signals from tissues up to 14 cm beneath the skin. The device allows for the active focusing and steering of ultrasound beams over a range of incident angles so as to target regions of interest. In healthy volunteers, we show that the phased array can be used to monitor cardiac tissue Doppler spectra, record central blood flow waveforms, and estimate cerebral blood supply in real-time. Stretchable and conformal skin-worn ultrasonic phased arrays may open up opportunities for wearable diagnostics.
 
Subject Engineering
 
Contributor Wang, Chonghe