Developed by scientists at the University of Bath in the UK, the graphene-based device is worn against the skin without piercing its surface. It incorporates an array of miniature sensors, which utilize a small electric current to draw glucose out from the interstitial fluid that’s located between cells within the body-hair follicles – each sensor covers an individual follicle.
The extracted glucose collects in tiny reservoirs, where it’s measured. This results in accurate blood glucose readings, which can be taken as often as once every 10 to 15 minutes over a period of several hours. It is hoped that once commercialized, the inexpensive disposable device could wirelessly transmit those readings to an app on the user’s smartphone, providing alerts when necessary.
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