glucose monitor

Scientists from the Military University of Technology in Warsaw, Poland have developed a continuous glucose monitoring (CGM) system that uses an optical and therefore non-invasive glucose sensor.

The technology behind the iSULIN system is based upon the Beer–Lambert law and uses light frequencies to accurately measure glucose levels just under the skin. Glucose readings are calculated based upon how much energy is absorbed and dissipated by molecules in the blood. As the concentration of glucose in the blood increases, the proportion of energy absorbed and dissipated changes. This allows an algorithm to calculate the level of glucose in the blood.

Optical SmartWatch sensor

To date, the glucose sensors that are used in continuous glucose monitors involve inserting a fine strand of metal under the surface of the skin. By using an optical sensor, the researchers have developed a non-invasive way that does not require puncturing the skin.

The iSULIN uses a SmartWatch sensor which is worn on the wrist and needs only to be pressed against the skin to provide readings. Results are sent wirelessly, via Bluetooth, to a smartphone on which readings can be viewed and analyzed. As with CGMs that are currently available, the monitor will require a small number of blood glucose tests to calibrate the system.

The research team, led by Dr Mariusz Chmielewski, picked up second place in the World Citizenship category of the Microsoft Imagine Cup 2015, which awards innovations in new technology.

The researchers have developed a prototype of the system and the next stage will be to undergo clinical trials before the system can go through the approval process.