Encoded biosensors and methods of manufacture and use thereof
First Claim
1. An analyte test sensor strip, comprising:
- a non-conductive substrate;
means for conducting quantitative or qualitative analysis of an analyte in a sample of fluid; and
an information circuit provided on said non-conductive substrate, said information circuit comprising;
a conductive primary path between a first end and a second end having a predetermined configuration between said first and second ends, wherein said conductive primary path has a resistance falling within a first predetermined range; and
a conductive secondary path between said first end of said conductive primary path and a third end, wherein said conductive secondary path is substantially defined by a plurality of open taps and a closed tap, wherein said closed tap selectively connects said third end with said conductive primary path at a predetermined location thereby defining a unique resistive path between the first end and the third end through at least a portion of said conductive primary path, wherein said unique resistive path has a second resistance falling within a second predetermined range;
wherein a ratio of said first resistance and said second resistance selectively correlates to an attribute of said analyte test sensor strip.
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Accused Products
Abstract
An analyte test sensor strip is disclosed having information coded thereon as well as a method of forming the same and conducting an analyte test using the analyte test sensor strip. Information relating to an attribute of the strip or batch/lot of strips may be coded based on resistance values pertaining to electrical aspects of the strip, such as a primary resistive element and a secondary resistive element, the secondary resistive element having one of a plurality of states defined by a location of a closed tap to form a unique resistive path for the secondary resistive element that includes a portion of the primary resistive element depending on the location of the closed tap. The states may be formed on the strip by a secondary processing step in the manufacture of the strip in which a plurality of taps are severed leaving only one tap in a closed state.
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Citations
9 Claims
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1. An analyte test sensor strip, comprising:
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a non-conductive substrate; means for conducting quantitative or qualitative analysis of an analyte in a sample of fluid; and an information circuit provided on said non-conductive substrate, said information circuit comprising; a conductive primary path between a first end and a second end having a predetermined configuration between said first and second ends, wherein said conductive primary path has a resistance falling within a first predetermined range; and a conductive secondary path between said first end of said conductive primary path and a third end, wherein said conductive secondary path is substantially defined by a plurality of open taps and a closed tap, wherein said closed tap selectively connects said third end with said conductive primary path at a predetermined location thereby defining a unique resistive path between the first end and the third end through at least a portion of said conductive primary path, wherein said unique resistive path has a second resistance falling within a second predetermined range; wherein a ratio of said first resistance and said second resistance selectively correlates to an attribute of said analyte test sensor strip. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for measuring a concentration of an analyte in a sample of fluid, comprising:
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providing a test meter; providing a test strip, said test strip comprising; a non-conductive substrate; a working electrode on said non-conductive substrate connectable to said test meter; a counter electrode on said non-conductive substrate connectable to said test meter; a reagent part bridging between said working electrode and said counter electrode; a primary resistive element on said non-conductive substrate having a first end connectable to said test meter and a second end connectable to said test meter, wherein said primary resistive element has a predetermined configuration; and a secondary resistive element on said non-conductive substrate having a third end connectable to said test meter, wherein said secondary resistive element has a plurality of taps, wherein a respective one of said taps is connected to said primary resistive element at a predetermined connection point on said predetermined configuration thereby defining a unique resistive path through at least a portion of said predetermined configuration having a resistance value; receiving said test strip into the test meter; operatively connecting said working electrode, said counter electrode, said primary resistive element, and said secondary resistive element with said test meter; determining an attribute associated with test strip as a function of a measurement associated with at least said resistance value associated with said unique resistive path; configuring said test meter as a function of said attribute; and displaying a measurement of said concentration of said analyte on a display of said test meter; wherein said primary resistive element has a primary element resistance value and said attribute is determined as a function of a resistance ratio determined by comparing said resistance value of said unique resistive path with said primary element resistance value. - View Dependent Claims (9)
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Specification