Patent ID: 6925393

Claim:
System for the determination of a glucose concentration, comprising: a data input device for entering insulin doses administered (I i ) and their times of administration (t i ), the same or a second data input device for entering carbohydrates (KH j ) consumed or to be consumed, and their times of consumption (t j ), a unit for measuring the actual glucose concentration (G a ) in a patient's bodily fluid at a specific point in time (t a ), a memory unit for storing administered insulin doses and their times of administration, and carbohydrates consumed and their times of consumption, an evaluation device for evaluating the data stored in the memory unit and extrapolating a glucose concentration at a point in time (t p ), whereby t p is after t a , and the extrapolation comprises the following steps: determination of the portion (I wirk ) of insulin doses that take effect within the interval between t a and t p , determination of the portion (KH wirk ) of carbohydrates consumed that take effect in the interval between t a and t p , and determination of a glucose concentration G p at the point in time t p using I wirk and KH wirk , wherein the portion of insulin doses (I wirk ) that take effect in the period between t a and t p is calculated using the following formula I WIRK = ∑ i = 1 n ⁢ ⁢ ∫ t a t p ⁢ C 1 ⁡ ( t ) ⁢ ⁢ ⅆ t ⁡ ( I i ) ; ⁢ n = number ⁢ ⁢ of ⁢ ⁢ insulin ⁢ ⁢ doses ⁢ ⁢ to ⁢ ⁢ be ⁢ ⁢ considered whereby C l represents the quantity of insulin that is bioavailable at the point in time t and therefore represents the insulin effectiveness profile; with ∫ 0 ∞ ⁢ C 1 ⁡ ( t ) ⁢ ⁢ ⅆ t = 1.