Patent ID: 8343331

Claim:
A method of correcting erroneous measurement results in a biosensor, the method comprising the steps of: (a) applying a first voltage from a voltage generator 12 to a test strip 10 when a blood sample is applied on the test strip 10 , and measuring an electric current generated from the test strip within one second of applying the first voltage by a micro controller unit (MCU), and then calculating a hematocrit value of the blood sample using the measured electric current value; (b) applying a second voltage from the voltage generator 12 to the test strip 10 after calculating the hematocrit value of the blood sample, and measuring an electric current generated from the test strip within a predetermined time of applying the second voltage, and then calculating a glucose level using the measured electric current value; and (c) correcting the glucose level in (b) by using the calculated hematocrit value in (a), wherein the step of calculating of the hematocrit value of the blood sample in (a) comprises calculating a hematocrit value using the following Equation 2, the following Equation 2 being obtained by preparing blood samples respectively having low, medium and high glucose levels corresponding to low, medium and high hematocrit values, measuring an electric current at 500 msec for each blood sample, and by estimating a slope and an intercept with X-axis representing an electric current, and Y-axis representing hematocrit: Hct(%)= m*I 0.5t +n (Equation 2) wherein, I 0.5t is a measured current value at 500 msec, and m and n are experimentally determined coefficients; and the step of correcting of the glucose concentration value in (c) is performed by using the following Equation 3: Glc2′=Glc2 *γ+δ (Equation 3) wherein, γ=(45−Hct(%))*0.075, δ=1; Glc2 is a measured glucose value before correcting a hematocrit effect; and Glc2′ is a calculated glucose value after correcting a hematocrit effect.