Analyte measurment method and system
Described and illustrated herein are systems and exemplary methods of operating a multianalyte measurement system having a meter and a test strip. In one embodiment, the method may be achieved by applying a test voltage between a reference electrode and a first working electrode; measuring a first test current, a second test current and a third test current at the working electrode with the meter after a blood sample containing an analyte is applied to the test strip; estimating a hematocrit-corrected analyte concentration from the first, second and third test currents; and displaying the hematocrit-corrected analyte concentration.
1. A method for determining a glucose concentration measurable with a system having a test strip and a meter, the method comprising:
applying a test voltage between a reference electrode and a working electrode coated with a reagent layer disposed on a matrix layer having a mediator;
measuring a first test current, a second test current and a third test current at the working electrode with the meter after a blood sample containing an analyte is applied to the test strip to physically transform the analyte into an enzymatic by-product;
determining a glucose concentration from the first, second and third test currents, in which the glucose concentration comprises a value obtained with the following:
G
=
[
(
I
1
I
2
)
p
I
3
]
-
intercept
1
slope
1
where:
G comprises the glucose concentration;
I 1 comprises the first test current;
I 2 comprises the second test current;
I 3 comprises the third test current;
p comprises a power term that depends on of the third test current in which the power term p comprises a value obtained with the following:
p
=
a
-
b
I
3
where a comprises a first tuning parameter between 2.5 and 5 and b comprises a second tuning parameter between 1.75 and 5;
intercept 1 comprises an intercept value determined from a linear regression of a plot of
[
(
I
1
I
2
)
p
I
3
]
versus a reference glucose concentration for a batch of test strips; and
slope 1 comprises a slope value determined from a linear regression of a plot of
[
(
I
1
I
2
)
p
I
3
]
versus the reference glucose concentration for the particular batch of test strip; and
displaying the glucose concentration.
2. The method of claim 1 , in which the threshold value of the first test current comprises from about 5 microamperes to about 7 microamperes.
3. The method of claim 1 , in which the power term comprises a value from about one to about four.