Patent ID: 7789829

Claim:
Sensor system for determining a glucose concentration in blood, comprising an implantable sensor ( 1 , 1 ′) and a user device (B) associated with the latter, wherein the sensor ( 1 , 1 ′) is in the form of an ampoule which contains a sensitive liquid and into which glucose can penetrate, in that a viscosity of the mixture consisting of the sensitive liquid and the glucose is measured, and in that the user device (B) consists of a portable device configured to be worn externally on the skin, the measurement and its evaluation being controlled through the user device (B) and wherein the viscosity is measured on the basis of an oscillatory behaviour of an oscillating element ( 8 ) in the form of a bending bar which is disposed in the sensor ( 1 ) and can be excited to oscillate by an oscillating magnetic field, and wherein a plastic part ( 3 ) is disposed in the sensor ( 1 ), partially filling the latter and confining the liquid volume, and is designed as a support for the oscillating element ( 8 ) and has an elongated bore ( 5 ) into which there projects an arm ( 11 ) which is disposed on a magnet ( 6 ) and which is provided for mixing the liquids together.