The Libre is a waterproof button the size of a quarter that sits on the outside of the upper arm. It houses a tiny needle-shaped sensor that rests just under the skin, continuously measuring glucose levels in the interstitial fluid that bathes the cells. Users hold a companion device, or an Android phone, above the sensor to get an immediate reading; an arrow indicates if levels are rising or falling.
To find a doctor and have the sensor installed in your city, use the contact form and I will send you the details. Please remember to mention your contact phone number.