A non-invasive blood glucose monitoring system

Abstract

Diabetes is a chronic and common disease that requires regular monitoring of blood sugar levels. The usual way to measure blood sugar includes finger tingling to take a blood sample and this method can be painful or cause a health risk if the finger is not sterilized. Researchers were interested in developing painless methods to measure blood sugar levels. Infrared technology has shown promising results in painlessly measuring blood sugar levels by analyzing the sugar level through external sensors. Thus, the researchers have recently shifted to employ infrared sensors to measure blood sugar levels. This is due to these sensing devices offering promising results, however, further improvement to enhance their prediction outcomes is still demanded to replace the current figure prick gauges. This paper presents a system designed to measure blood sugar levels in a non-invasive manner through near-infrared technology. An infrared-emitting diode with a wavelength of 940 nm was used as a transmitter and a photodetector (BPW41N-ND) as a receptor of radiation by measuring infrared changes after passing through the tip of the index finger. The sensor measures blood sugar by developing a regression equation to analyze the collected data. Hence, a tailored equation was selected for Males and another model for Females. For males, an accuracy of 81.25 % was achieved, whereas 82.6 % was realized for females and 74.28 % for all. While the precision of 92.5 % and 94.1 % of males and females, and for all data, 91.07 %, was achieved. The device is designed to be simple and compact to be utilized by diabetic patients as self-monitoring blood glucose (SMBG) and display the results on an OLDE screen simply and clearly.