Analyte measurement method and system with error trapping

摘要

Described and illustrated herein are systems and exemplary methods of operating an analyte measurement system having a meter and a test strip. The methods and systems describe herein allow for trapping various errors during calculation of the analyte due to variations in the structure and materials making up the test strip and ambient temperatures.

主权项

1. A method for determining a glucose concentration with a system having a test strip and a meter having a test circuit including a microprocessor, the method comprising:
initiating a chemical reaction between a reference electrode and a second working electrode coated with a reagent layer and between the reference electrode and a first working electrode coated with a reagent layer of the test strip; measuring a primary test current and a secondary test current on one of the first and second working electrodes; determining whether a difference between the primary test current and secondary test current is less than zero; if the difference between the primary test current and secondary test current is less than zero, then deriving a glucose concentration based on a plurality of test currents in which the plurality of measured test currents comprises first, second, third, fourth, and fifth test currents and K comprises a value from about 1.0 to about 2.0, and wherein the deriving comprises calculating a value representative of glucose concentration with an equation of the form:G=[(I1I2)(a-b⁢I3I4)⁢x⁢⁢I5]-interceptslope where:G comprises the glucose concentration;Ii comprises the first test current;I2 comprises the second test current;I3 comprises the third test current;I4 comprises the fourth test current;I5 comprises the fifth test current;a comprises a first tuning parameter and b comprises a second tuning parameter;intercept comprises an intercept value determined from a linear regression of a plot of[(I1I2)(a-b⁢I3I4)⁢x⁢⁢I5]  versus a reference glucose concentration; andslope comprises a slope value determined from a linear regression of a plot of[(I1I2)(a-b⁢I3I4)⁢x⁢⁢I5]  versus the reference glucose concentration; and if the difference between the primary test current and secondary test current is not less than zero, then returning an error.