Devices and methods of determining disturbance variable-corrected analyte concentrations
First Claim
1. A method of determining at least one analyte concentration in a body fluid sample, the method comprising the steps of:
- providing at least one test element that comprises at least one reagent element configured for at least one optically detectable detection reaction in the presence of the analyte;
applying the body fluid sample to the test element;
detecting a time course of at least one optical measurement variable of the reagent element;
determining at least one disturbance variable value in the body fluid sample from at least one first time interval of the time course of the at least one optical measurement variable; and
determining the at least one analyte concentration from at least one second time interval of the time course of the at least one optical measurement variable,wherein a time interval is a quantity of measurement time points comprising at least two measurement time points,wherein during the detecting of the time course of the at least one optical measurement variable in the first time interval and the second time interval, the reagent element is irradiated by at least one interrogating light beam from at least one interrogating light source, and wherein at least one response light beam from the reagent element is detected by at least one detector, and wherein the time course of at least one optical measurement variable in the first time interval includes a sudden wetting-induced change in the optical measurement variable.
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Accused Products
Abstract
Devices and methods are provided for determining concentration of at least one analyte in a body fluid sample such as blood, especially a blood glucose concentration. In the methods, a test element is provided that has at least one reagent element configured so as to carry out at least one optically detectable detection reaction in the presence of the analyte. The body fluid sample is applied to the test element and a time course of at least one optical measurement variable of the reagent element is detected. At least one first time interval of the time course of the optical measurement variable is used to determine at least one disturbance variable value in the body fluid sample, in particular a concentration of a disturbance variable such as hematocrit. At least one second time interval of the time course is used to determine analyte concentration. The at least one disturbance variable value can be used to correct/compensate the analyte concentration.
21 Citations
18 Claims
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1. A method of determining at least one analyte concentration in a body fluid sample, the method comprising the steps of:
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providing at least one test element that comprises at least one reagent element configured for at least one optically detectable detection reaction in the presence of the analyte; applying the body fluid sample to the test element; detecting a time course of at least one optical measurement variable of the reagent element; determining at least one disturbance variable value in the body fluid sample from at least one first time interval of the time course of the at least one optical measurement variable; and determining the at least one analyte concentration from at least one second time interval of the time course of the at least one optical measurement variable, wherein a time interval is a quantity of measurement time points comprising at least two measurement time points, wherein during the detecting of the time course of the at least one optical measurement variable in the first time interval and the second time interval, the reagent element is irradiated by at least one interrogating light beam from at least one interrogating light source, and wherein at least one response light beam from the reagent element is detected by at least one detector, and wherein the time course of at least one optical measurement variable in the first time interval includes a sudden wetting-induced change in the optical measurement variable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of determining at least one analyte concentration in a body fluid sample, the method comprising the steps of:
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providing at least one test element that comprises at least one reagent element configured for at least one optically detectable detection reaction in the presence of the analyte; applying the body fluid sample to the test element; detecting a time course of at least one optical measurement variable of the reagent element; determining at least one disturbance variable value in the body fluid sample from at least one first time interval of the time course of the at least one optical measurement variable; and determining the at least one analyte concentration from at least one second time interval of the time course of the at least one optical measurement variable, wherein a time interval is a quantity of measurement time points comprising at least two measurement time points, wherein during the detecting of the time course of the at least one optical measurement variable in the first time interval and the second time interval, the reagent element is irradiated by at least one interrogating light beam from at least one interrogating light source, and wherein at least one response light beam from the reagent element is detected by at least one detector, wherein the interrogating light beam has a same wavelength and/or a same spectral properties in the first time interval and the second time interval. - View Dependent Claims (10)
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11. A device for determining at least one analyte concentration in a body fluid sample, the device comprising:
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at least one test element, wherein the test element has at least one reagent element configured for at least one optically detectable detection reaction in the presence of the at least one analyte, and wherein the body fluid sample may be applied to the test element; at least one interrogating light source for providing at least one interrogating light beam; at least one optical detection device, wherein the optical detection device is configured for detecting a time course of at least one optical measurement variable of the reagent element; at least one evaluation device, wherein the evaluation device is configured for determining at least one disturbance variable value in the body fluid sample from at least one first time interval of the time course of the at least one optical measurement variable, and wherein the evaluation device is further configured for determining the at least one analyte concentration from at least one second time interval of the time course, wherein a time interval is a quantity of measurement time points comprising at least two measurement time points, wherein during the detecting of the at least one optical measurement variable in the first time interval and the second time interval, the reagent element is irradiated by the at least one interrogating light beam from the at least one interrogating light source, and wherein at least one response light beam from the reagent element is detected by at least one optical detection device, and wherein the time course of the optical measurement variable in the first time interval includes a sudden wetting-induced change in the optical measurement variable. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A device for determining at least one analyte concentration in a body fluid sample, the device comprising:
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at least one test element, wherein the test element has at least one reagent element configured for at least one optically detectable detection reaction in the presence of the at least one analyte, and wherein the body fluid sample may be applied to the test element; at least one interrogating light source for providing at least one interrogating light beam; at least one optical detection device, wherein the optical detection device is configured for detecting a time course of at least one optical measurement variable of the reagent element; at least one evaluation device, wherein the evaluation device is configured for determining at least one disturbance variable value in the body fluid sample from at least one first time interval of the time course of the at least one optical measurement variable, and wherein the evaluation device is further configured for determining the at least one analyte concentration from at least one second time interval of the time course, wherein a time interval is a quantity of measurement time points comprising at least two measurement time points, wherein during the detecting of the at least one optical measurement variable in the first time interval and the second time interval, the reagent element is irradiated by the at least one interrogating light beam from the at least one interrogating light source, and wherein at least one response light beam from the reagent element is detected by at least one optical detection device, wherein the at least one optical detection device is configured for detecting the at least one optical measurement variable in the first time interval and the second time interval at the same wavelength.
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Specification