Non-Invasive Blood Glucose Measurement Device: Performance analysis of Diffused Reflectance method and Diffused Transmittance method using Near Infrared Light

Diabetes is a condition that develops when blood glucose, often known as blood sugar, is too high. A diabetic patient must constantly monitor his or her blood glucose level to keep it under control. In the commercial invasive approach, a patient must injure his body part to obtain a blood sample, which is uncomfortable for the patient and can increase the risk of infection. Blood glucose monitoring using a non-invasive technique can lessen discomfort. In this paper, we suggested a non-invasive blood glucose measuring technique that consists of a Near Infrared LED (940nm) and a photodetector to estimate blood glucose levels. In our work, we employed Near Infrared Light to assess blood glucose levels. Following the device's implementation, we compared the accuracies of both diffused reflectance method and diffused transmittance method to see which method is preferable. It was found that diffused transmittance method is the better one of the two. The results from both methods were also compared with a commercial invasive blood glucometer on the market. It is observed from Clarke Error Grid Analysis that, most of the test data from diffused transmittance method lies in Region A. We have also developed an app that can show the data from the devices on patients' smartphones.