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Monday, August 16, 2010


A device invented by MIT’s researchers allows to measure and monitor -without pain- blood glucose, using near to infrared light applied on skin. MIT Spectroscopy Laboratory’s researchers used Raman Spectroscopy (light on specific molecular bonds, with emission of photons), to measure levels of glucose with simple scans of a finger, with near to infrared light. The problem at the moment is that near infrared light alone penetrates 0,5 mm under the skin, measuring the glucose of interstitial liquid that bath the skin and not the blood. Immediately after eating blood glucose rises quickly, delaying 5-10 minutes to reach the corresponding level in the interstitial liquid. For it, Barman and Kong have invented a new calibration method: Dynamic Concentration Correction (DCC), to measure the rate at which blood glucose diffuses to the interstitial liquid.


Un dispositivo inventado por investigadores del MIT permite medir y monitorizar -sin dolor- la glucosa sanguínea, empleando luz cercana al infrarojo, aplicada sobre la piel. Los investigadores del MIT Spectroscopy Laboratory emplearon espectroscopia Raman (luz sobre uniones moleculares especificas, con emisión de fotones), para medir niveles de glucosa con simples scans de un dedo, con luz cercana al infrarojo. El problema por ahora es que la luz cercana al infrarojo solo penetra 0,5 mm debajo de la piel, midiendo la glucosa del liquido intersticial que baña la piel y no el de la sangre. Inmediatamente después de comer la glucosa se eleva rápidamente demorando 5-10 minutos para alcanzar el correspondiente nivel en el liquido intersticial. Por ello, Barman y Kong han inventado un método de calibración : Dynamic Concentration Correction (DCC), para medir la frecuencia a la cual la glucosa de la sangre difunde al liquido intersticial.

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