Patent ID: 8880371

Claim:
A measuring system for determining a value of a glucose concentration, the measuring system comprising: a. a measuring sensor ( 2 , R m , R ref ), having a known gradient and a known offset, for recording a measured value in vivo in a temporally sequential or continuous fashion, and outputting measuring sensor values (P 1 , P 2 ), the measured values of the measured variable or formed from the measured values, and b. a data acquisition device that receives the measuring sensor values and at least one reference value and forms characteristic values of the glucose concentration from the measuring sensor values, wherein the measuring sensor is a glycose sensor and the at least one reference value is a long-term glycose value, and wherein the data acquisition device creates a long-term glucose value from the at least one reference value and calculates a daily mean or a multiple daily mean of the glucose concentration from the measuring sensor values, and the offset is corrected in accordance with the result of the comparison of the daily mean or multiple daily mean with the long-term glucose value to minimize the difference between the daily mean or multiple daily mean and the long-term glucose value; and wherein c. for the purpose of an automatic self-calibration of the measuring system, the data acquisition device compares the at least one reference value or a value calculated therefrom with the characteristic value from the corresponding time interval, and the offset of the measuring sensor is adjusted in accordance with the result of the comparison by a one-point calibration.