A Russian Innovation Measures Blood Sugar Without Skin Pricks, Improving Comfort for Diabetics

A team of scientists at Saratov State Research University in Russia has developed a new sensor capable of accurately measuring glucose levels without piercing the skin, marking a promising breakthrough for people living with diabetes.

This innovation enables continuous, real-time blood sugar monitoring while avoiding the pain of traditional methods. It also provides a more precise picture of daily glucose fluctuations.

The sensor is made from a flexible, breathable material using a polyacrylonitrile substrate coated with silver nanoparticles, which amplify the glucose signal through the phenomenon of surface-enhanced Raman scattering (SERS). This significantly boosts the accuracy and sensitivity of the readings. The sensor is then coated with the enzyme glucose oxidase, which reacts directly with the targeted molecules.

Successful tests were conducted on samples of water and synthetic sweat containing glucose concentrations ranging from 1 to 10 mmol/L — covering levels from normal to severe hyperglycemia.

According to Olga Gousliakova, lead researcher at the university’s Biomedical Optoacoustics Laboratory, the non-woven fiber structure of the sensor helps concentrate molecules in “hot spots” that enhance the optical signal. This improves measurement reliability and precision while maintaining the flexibility and comfort needed for daily use.

This Russian innovation represents a fully non-invasive technology, allowing glucose levels to be analyzed through sweat on the skin’s surface without any surgical procedure. It has the potential to improve the quality of life for people with diabetes and reduce their dependence on painful traditional methods.