Patent ID: 8460537

Claim:
A method for determining an analyte concentration using a test strip having a working electrode and a reference electrode, the method comprising: applying a test voltage between the working electrode and the reference electrode; measuring a plurality of test currents with the test meter when a blood sample containing the analyte is applied to the test strip; calculating an analyte correlation value (Y) using an equation which is Y = ∑ t = t F ⁢ ⁢ 1 t L ⁢ ⁢ 1 ⁢ I ⁡ ( h , G , t ) ⁢ q ⁡ ( t ) + ∑ t = t F ⁢ ⁢ 2 t L ⁢ ⁢ 2 ⁢ I ⁡ ( h , G , t ) ⁢ q ⁡ ( t ) + ∑ t = t F ⁢ ⁢ 3 t L ⁢ ⁢ 3 ⁢ I ⁡ ( h , G , t ) ⁢ q ⁡ ( t ) where t F1 is a starting point of a first pre-determined time interval, t L1 is an ending point of a first pre-determined time interval, t F2 is a starting point of a second pre-determined time interval, t L3 is an ending point of a second pre-determined time interval, t F3 is a starting point of a third pre-determined time interval, t L3 ia an ending point of a third pre-determined time interval, I(t) is a current as a function of hematocrit h, glucose G, and time t, q(t) is a correction function of time t.; and calculating the analyte concentration base on the analye correlation value (Y) wherein the method further comprises the step of calculating the ending point and starting point of the first pre-determined time interval, the second pre-determined time interval, and the third pre-determined time interval (t F1 , t L1 , t F2 , t L2 , t F3 , and t L3 ) using an error minimization function S, wherein the error minimization function S is based on a background sensitivity function a(t), glucose sensitivity function b(t), and a hematocrit sensitivity function c(t), wherein the error minimization function S is S=[∫a ( t ) c ( t ) q ( t ) dt] 2 +[∫b ( t ) c ( t ) q ( t )] 2 ≈0.