Systems and methods for correction of on-strip coding
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Publication Number
US-9911013-B2
Publication Date
2018-03-06
Expiration Date
Abstract
Systems and methods of making a diagnostic test strip, the method including marking a machine-readable pattern onto the diagnostic test strip which contains information that allows a meter designed to work with the test strip to convert raw signal data from the diagnostic test strip into a meaningful concentration value for an analyte of interest. The method further includes printing the machine-readable pattern having a modified based code that is different from a base code of the diagnostic test strip being produced, wherein the modified based code is based on a strip geometry parameter, a chemistry parameter or both the strip geometry and chemistry parameters that are measured for the diagnostic test strip.
Core Innovation
The disclosure describes diagnostic test strips that include a base code of a machine-readable pattern. The base code comprises information that allows a meter designed to work with the diagnostic test strips to convert raw signal data from one or more electrodes into a meaningful concentration value for an analyte of interest.
A modified code of a machine-readable pattern is marked on one or more diagnostic test strips, the modified code being different from the base code and modifying information encoded by the base code. The modified code is based on a difference in an average value for one or more strip geometry parameters, one or more chemistry parameters, or both.
The modified code enables the meter microprocessor to compensate by applying offsets and/or algorithmic transformations or by mapping through a lookup table, based on the coded information associated with the diagnostic test strips. The disclosure further reports improved precision, such as reduced standard deviation or variance, in glucose readings after applying geometry and chemistry based coding corrections.
Claims Coverage
The independent claim covers a method of making diagnostic test strips with a base code and a modified code. The claim set includes inventive features related to modifying encoded information based on strip geometry parameters and/or chemistry parameters, and dependent claims further define lookup-table use and offset behavior.
Dual machine-readable base and modified codes
Marking a base code of a machine-readable pattern onto a plurality of diagnostic test strips, and marking a modified code of a machine-readable pattern onto one or more diagnostic test strips, wherein the modified code is different from the base code and modifies information encoded by the base code.
Meter-convertible code for analyte concentration
The base code comprising information that allows a meter designed to work with the plurality of diagnostic test strips to convert raw signal data from one or more electrodes on the plurality of diagnostic test strips into a meaningful concentration value for an analyte of interest.
Geometry and chemistry parameter-based code modification
Modifying information encoded by the base code based on a difference in an average value for one or more strip geometry parameters, one or more chemistry parameters, or both and a corresponding value for the one or more diagnostic test strips.
Lookup-table driven concentration modification by modified code
Using the modified code to modify the concentration value via a meter lookup table mechanism.
Offset of base code instructed by modified code
Marking the modified code onto the test strip instructing the meter to offset the base code of the first machine-readable pattern by a certain amount.
The core inventive concept is encoding diagnostic strip identity with a base machine-readable code and a different modified machine-readable code. The modified code adjusts information encoded by the base code based on differences in average strip geometry parameters and/or chemistry parameters, enabling meter interpretation that includes lookup-table based concentration modification and/or instructing an offset of the base code.
Stated Advantages
Improved precision in glucose readings, including reduced standard deviation or variance after applying geometry and chemistry based coding corrections.
Economical improved accuracy for clinical/home settings.
Documented Applications
Use in a glucose meter context for blood glucose readings, including improved accuracy suitable for clinical/home settings.
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