Method and test strip for determining a fluid analyte
First Claim
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1. A method for determining analyte concentration in a fluid sample, the method comprising the acts of:
- (a) providing a test strip having a sample side and a reaction side, the test strip including a porous membrane, the test strip being adapted to accept a sample on the sample side and pass it towards the reaction side, said test strip including a testing reagent, said testing reagent comprising a color indicator system that changes color to indicate the presence of the analyte in the sample, said test strip further having a polymer on at least the reaction side, said polymer increasing the opacity of at least a portion of the test strip after contact with a sample, said polymer being selected from the group consisting of acrylic latex polymers, polystyrene sodium sulfate polymers, and combinations thereof;
(b) applying the sample to the sample side of the test strip; and
(c) measuring the change in color of the testing side to determine the analyte concentration of the sample.
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Abstract
A reagent strip for measuring the concentration of glucose in whole blood has a polymer on at least one side thereof to increase the opacity thereof, thereby reducing the effect of hematocrit on the glucose determination.
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Citations
22 Claims
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1. A method for determining analyte concentration in a fluid sample, the method comprising the acts of:
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(a) providing a test strip having a sample side and a reaction side, the test strip including a porous membrane, the test strip being adapted to accept a sample on the sample side and pass it towards the reaction side, said test strip including a testing reagent, said testing reagent comprising a color indicator system that changes color to indicate the presence of the analyte in the sample, said test strip further having a polymer on at least the reaction side, said polymer increasing the opacity of at least a portion of the test strip after contact with a sample, said polymer being selected from the group consisting of acrylic latex polymers, polystyrene sodium sulfate polymers, and combinations thereof; (b) applying the sample to the sample side of the test strip; and (c) measuring the change in color of the testing side to determine the analyte concentration of the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 22)
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11. A test strip for measuring an analyte concentration in a fluid sample, the test strip comprising:
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(a) a porous membrane having a sample side and a reaction side, the membrane being adapted to accept the sample on the sample side and pass it towards the reaction side; (b) a testing reagent supported by the membrane, said testing reagent comprising a color indicator system that changes color to indicate the presence of analyte in the sample; and (c) a polymer on at least a portion of the reaction side of the porous membrane, said polymer increasing the opacity of at least a portion of the test strip after contact with the sample, said polymer being selected from the group consisting of acrylic latex polymers, polystyrene sodium sulfate polymers, and combinations thereof. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification