Disposable oxygen sensor and method for correcting oxygen effect on oxidase-based analytical devices
First Claim
1. A method of correcting the oxygen effect on oxidase-based analyte sensors comprising:
- determining an oxygen concentration of a fluid sample using an oxygen sensor comprising a working electrode, a reference electrode and a reagent matrix disposed on at least said working electrode wherein said reagent matrix contains a reduced form of a redox mediator, an oxidase and a peroxidase and wherein said oxygen sensor has a known correlation between oxygen concentration and analyte concentration expressed as a function of the response of said oxygen sensor to both oxygen and an analyte wherein said analyte is a substrate of said oxidase;
using an oxidased-based analyte sensor wherein the correlation between oxygen concentration and oxygen effect on said oxidase-based analyte sensor is known and wherein an oxidase in said oxidased-based sensor is a substrate of said oxidase in said oxygen sensor;
determining an analyte concentration of said fluid sample using said oxidase-based analyte sensor; and
calculating a corrected analyte concentration in said fluid sample using said determined oxygen concentration.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method for correcting the oxygen effect on oxidase-based analyte sensors includes an oxygen sensor with a working electrode, a reagent matrix disposed on at least the working electrode that contains a reduced form of a redox mediator, an oxidase and a peroxidase, an oxidase-based analyte sensor, a means for determining the oxygen concentration in a portion of a fluid sample using the oxygen sensor, means for determining an analyte concentration in another portion of the fluid sample using the oxidase-based analyte sensor, and means for using the oxygen concentration in the fluid sample to determine a corrected analyte concentration in the fluid sample.
-
Citations
33 Claims
-
1. A method of correcting the oxygen effect on oxidase-based analyte sensors comprising:
-
determining an oxygen concentration of a fluid sample using an oxygen sensor comprising a working electrode, a reference electrode and a reagent matrix disposed on at least said working electrode wherein said reagent matrix contains a reduced form of a redox mediator, an oxidase and a peroxidase and wherein said oxygen sensor has a known correlation between oxygen concentration and analyte concentration expressed as a function of the response of said oxygen sensor to both oxygen and an analyte wherein said analyte is a substrate of said oxidase; using an oxidased-based analyte sensor wherein the correlation between oxygen concentration and oxygen effect on said oxidase-based analyte sensor is known and wherein an oxidase in said oxidased-based sensor is a substrate of said oxidase in said oxygen sensor; determining an analyte concentration of said fluid sample using said oxidase-based analyte sensor; and calculating a corrected analyte concentration in said fluid sample using said determined oxygen concentration. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A system for correcting the oxygen effect on oxidase-based analyte sensors, said system comprising:
-
an oxygen sensor comprising a working electrode, a reference electrode and a reagent matrix disposed on at least said working electrode wherein said reagent matrix contains a reduced form of a redox mediator, an oxidase and a peroxidase wherein said oxygen sensor has a known correlation between oxygen concentration and analyte concentration expressed as a function of the response of said oxygen sensor to both oxygen and an analyte wherein said analyte is a substrate of said oxidase; an oxidase-based analyte sensor for measuring an analyte in a portion of a fluid sample wherein said analyte is a substrate of said oxidase in said oxygen sensor and wherein the correlation between oxygen concentration and oxygen effect on said oxidase-based analyte sensor is known; means for electronically determining an oxygen concentration in a portion of said fluid sample using said oxygen sensor; means for electronically determining an analyte concentration in another portion of said fluid sample using said oxidase-based analyte sensor; and means for using said determined oxygen concentration in said fluid sample to determine a corrected value of said analyte concentration in said fluid sample. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
-
-
27. A combination for correcting the oxygen effect on oxidase-based analyte sensors, the combination comprising:
-
a disposable sensor strip comprising; an oxygen electrode with an oxygen reagent matrix disposed thereon, said oxygen reagent matrix includes a reduced form of a redox mediator, an oxidase and a peroxidase wherein said oxygen sensor has a known correlation between oxygen concentration and analyte concentration expressed as a function of the response of said oxygen sensor to both oxygen and an analyte wherein said analyte is a substrate of said oxidase; an oxidase-based analyte electrode with an oxidase-based reagent matrix thereon, said oxidase-based reagent matrix includes an oxidized form of a redox mediator and an enzyme capable of catalyzing a reaction involving a substrate for said oxidase of said oxygen electrode and wherein the correlation between oxygen concentration and oxygen effect on said oxidase-based analyte sensor is known; a reference electrode; and a sample chamber containing said oxygen electrode, said oxidase-based analyte electrode and said reference electrode; and meter means for electronically coupling said oxygen electrode and said reference electrode to measure an oxygen concentration in a sample fluid, for electronically coupling said oxidased-based analyte electrode to said reference electrode to measure an analyte concentration in said sample fluid, and for electronically calculating a corrected analyte concentration in said fluid sample using said measured oxygen concentration. - View Dependent Claims (28, 29, 30, 31, 32, 33)
-
Specification