In a must see article at IVD Technology, we see a mention of the GlucoWatch G2 Biographer by California-based Cygnus Inc.
The company describes its reverse iontophoresis device:
The GlucoWatch G2 Biographer uses an extremely low electrical current to extract glucose molecules through the skin using patented sampling processes. The glucose is extracted from interstitial fluid that surrounds skin cells, rather than from blood, eliminating the need for multiple finger pricks to provide glucose readings. The Biographer can be worn like a wristwatch and functions like a computer, analyzing and responding to data received from the AutoSensor. The AutoSensor uses proprietary biosensor technology and snaps into the back of the Biographer. The AutoSensor is calibrated with a standard blood glucose measurement and takes two hours to warm up. After the warm-up period, the AutoSensor automatically and non-invasively extracts and measures glucose every 10 minutes for a period of up to 13 hours before requiring replacement. The patient will receive up to six glucose readings per hour.
As you can see from the description above, the device needs one-a-day glucose measuring needle stick for calibration. On the plus side, GlucoWatch G2 Biographer has FDA approval, and the device can store up to 8,500 records.
DiabetesUK provides more details.
More at Cygnus…