Diseño e implementación de un glucómetro no invasivo basado en la ley de Lambert Beer y longitud de onda cercana al infrarrojo (NIR), con interfaz de comunicación bluetooth a dispositivos con sistema operativo Android

Abstract

This project aims to develop a team capable of making a measurement of blood glucose levels non-invasively, using an oximeter sensor, which sends visible light with wavelength of 660 nm and length infrared light 890 nm wavelength, an electronic circuit that allows to acquire a photoplethysmographic signal with which to measure glucose levels and then be displayed on a LCD and sent wirelessly to a smartphone Samsung S3. The meter is designed to correlate with the amount light absorbed by concentration of the substance (glucose), using Lambert's Law - Beer method is based on the optical absorption of NIR spectroscopy. The results showed the glucose meter team have a relative error of 5.226% compared with the data of glucometer brand commercial use accuchek Roche Active, indicating that non invasive equipment is within the range set by ISO 15197, with a standard deviation of ± 1.66 mg / dl of glucose and 2.4% repeatability. The equipment developed in this project takes care of the continuous glucose monitoring non-invasively, using a mobile device that S3 allows glucose values collected in a database and send them to a website thereby improving medical diagnosis time which is important for people suffering from diabetes.