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Friday, July 30, 2010


A titanium sensor of 3,4 cm of diameter implanted under the skin, able to monitor in permanent form tissue glucose’s concentrations by means of wireless telemetry, has been developed in pigs with eventual application in human diabetics. According to David Gough (University of California/San Diego), the sensor works continually (220 and 520 days), in diabetic and non diabetics pigs. The sensor detects the glucose by means of enzymatic electrodes that detect electrochemical differences of oxygen. The sensibility of the sensor is discreetly limited by its encapsulation, variations in local vascular perfusion, enzymatic inactivacion, limited readiness of oxygen, etc. The small differences observed between blood and tissue glucose are the result of transfer of glucose from blood to the tissues.

MEDICION DE GLUCOSA SIN AGUJAS

Un sensor de titanio, de 3,4 cm de diámetro implantado debajo de la piel, capaz de monitorizar en forma permanente las concentraciones de glucosa tisular mediante telemetria inalámbrica, ha sido desarrollada en cerdos con eventual aplicacion en diabéticos humanos. Según David Gough (University of California/San Diego), el sensor funcionó continuamente (220 y 520 dias), en cerdos diabéticos y no diabéticos. El sensor detecta la glucosa mediante electrodos enzimáticos que detectan diferencias electroquímicas de oxigeno. Empero la sensibilidad del sensor es discretamente limitada por su encapsulación, variaciones en la perfusión vascular local, inactivacion enzimática, disponibilidad limitada de oxigeno, etc. Las pequeñas diferencias observadas entre la glucosa sanguínea y la tisular son el resultado de trasferencias de glucosa de la sangre a los tejidos.

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