IIT Madras develops low-cost, minimally invasive glucose monitoring device

IIT Madras researchers have developed and patented a low-cost, user-friendly glucose monitoring device that shows readings directly on a microneedle patch. The reusable, energy-efficient system eliminates finger pricks and smartphone dependence, making diabetes management simpler and more affordable

Hyderabad: The Indian Institute of Technology Madras (IIT Madras) researchers have developed and patented a cost-effective, user-friendly, and minimally invasive glucose-monitoring device for diabetic patients.

The most common method for checking blood glucose levels is via Self-Monitoring of Blood Glucose (SMBG) that requires finger-prick blood sampling multiple times a day. It is effective, but invasive. Continuous Glucose Monitoring (CGM) systems represent an advance over SMBG, offering real-time readings without repeated finger pricks.

---

However, the current generation of CGMs comes with its own set of limitations, such as high cost, dependence on separate devices, such as smartphones or dedicated readers, to display results.

In addressing these challenges, IIT Madras researchers from the Electronic Materials and Thin Films Lab, led by Prof Parasuraman Swaminathan, developed a set of innovations that together redefine a CGM device.

The cornerstone of this solution is a modular system that combines reusable electronics and a low-power display unit with a disposable microneedle sensor patch.

The reusable unit houses the control electronics, power source, communication interfaces, and a novel low-powered, patented electro-thermochromic display. Unlike conventional CGMs, which rely on smartphones or bulky receivers, this device shows glucose readings directly on the patch. This means that whether the patient is in a meeting, out for a jog, or simply relaxing at home, he/she can check the glucose level with a glance, no external gadget required.

The entire system has been optimised for energy efficiency. The patented electro-thermochromic display consumes power only when updating readings, and the electronics are designed to function on low power, extending battery life and reducing the frequency of recharging.

Highlighting the impact of this device, Prof Swaminathan said, “From a researcher’s perspective, the real measure of success is when an idea steps out of the lab and starts making a tangible difference in people’s lives. In the case of diabetes management, that difference could mean sparing someone the discomfort of multiple finger pricks a day, helping them stay in range more consistently, and ultimately preventing long-term complications.”