Red laser blood glucose monitoring device

Abstract

Conventional Invasive technique for blood glucose monitoring requires a finger prick blood sample, a repetitive painful process that creates the peril of infection and costly too. Complications aroused due to the abnormal blood glucose level in diabetic patients have created the necessity of BGM. Laser light based sensors have demonstrated a superior potential for BGM. Near-infrared (NIR) based BGM technique is existing one but it has shortcomings, such as absorption of light in human tissue, higher signal to noise ratio (SNR) and lower accuracy. A simple compact and cost-effective non-invasive devise using visible red laser light of 650 nm for Blood Glucose Monitoring (RL-BGM) is implemented in this paper. The RL-BGM device has major technical advantages over NIR such as 30 times better transmittance through human tissue. The refractive index of Red laser light is more sensitive to the variations in glucose level concentration. RL-BGM has faster response time (approx 7-10 s). Linearity and accuracy are higher in case of RL-BGM and both in-vitro and in-vivo cases and several experimental results have been generated to ensure the accuracy and precision of the RL-BGM device.