Researchers develop glucose monitoring device that doesn't need a finger prick
They've developed a pioneering glucose monitoring sensor that does away with painful needle pricks. Instead, it uses electromagnetic technology to track blood sugar levels in real-time without requiring blood samples.
The sensor, designed to be placed between the joint of the thumb and first finger, works in two parts: A sender and a receiver. The sender emits radio waves, which pass through the skin and are then captured by the receiver.
By analysing changes in the electrical frequency, the device accurately determines the glucose level — all without a single drop of blood being drawn.
The innovation was developed by researchers from the Department of Electronics and Communication Engineering (ECE) at MNNIT, including Prof VS Tripathi and his research students Piyush Mishra and Tilakdhari Singh, in collaboration with Dr Shiv Shankar Tripathi and Dr Swagat Mahapatra from RMLIMS.
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Their research was published in the Defence Science Journal and the technology has already received a patent.
The scientists explained that electromagnetic waves travel from one medium to another, and by measuring changes in frequency, the sensor can detect glucose levels. Since every liquid has its own distinct electrical properties of dissolved sugar level (which is known by a standard mathematical model), the blood between the skin and flesh too has a dielectric constant, allowing the sensor to easily measure sugar levels without interference from bone.
"We just connect the device and the changes in the frequency of the electromagnetic waves will provide the precise reading without a single prick or any pain thereof," said Prof Tripathi.
This non-invasive sensor offers continuous glucose monitoring, making diabetes management easier and less painful. According to Prof Tripathi, the technology will be especially useful for patients who require frequent monitoring, as it allows for real-time tracking and timely treatment.
Importantly, the sensor is also designed to be cost-effective. With an expected retail price of no more than Rs 500, it could be a game-changer in diabetes care, particularly for those from lower-income groups. The compact size of the sensor makes it highly portable and user-friendly, ensuring that patients can carry and use it conveniently anywhere.
The project received financial support of Rs 8.94 lakh from the Council of Science and Technology, Uttar Pradesh. With this innovation, the research team took a major step toward making modern diabetes care more accessible, affordable, and comfortable.
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