Metering technique for lateral flow assay devices
First Claim
1. A method for performing a lateral flow assay, the method comprising:
- providing a sampling membrane with a receiving region, a collection region and a detection region;
defining a barrier between the collection region and the detection region so that the collection region has a known saturation volume that is less than about 100 microliters;
supplying a test sample to a receiving region of the membrane and saturating the collection region with the test sample so that a known volume of the test sample is contained in the collection region that corresponds to the known saturation volume of the collection region;
removing the barrier between the collection region and detection region of the membrane;
supplying a diluent to the collection region of the membrane to facilitate flow of the test sample from the collection region to the detection region of the membrane; and
defining the collection region by separating the collection region from the receiving region prior to supplying the diluent to the collection region.
1 Assignment
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Abstract
A diagnostic method and associated test kit for detecting an analyte residing in a test sample is provided. A sample membrane is utilized having a collection region and a detection region, the collection region having a known saturation volume for the intended test sample. A barrier is defined between the collection region and the detection region. The collection region is saturated with the test sample having a volume of less than about 100 microliters so that a known volume of the test sample is contained in the collection region. The barrier is removed from between the collection region and detection region of the membrane and a diluent is supplied to the collection region of the membrane to facilitate flow of the test sample from the collection region to the detection region of the membrane.
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Citations
22 Claims
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1. A method for performing a lateral flow assay, the method comprising:
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providing a sampling membrane with a receiving region, a collection region and a detection region; defining a barrier between the collection region and the detection region so that the collection region has a known saturation volume that is less than about 100 microliters; supplying a test sample to a receiving region of the membrane and saturating the collection region with the test sample so that a known volume of the test sample is contained in the collection region that corresponds to the known saturation volume of the collection region; removing the barrier between the collection region and detection region of the membrane; supplying a diluent to the collection region of the membrane to facilitate flow of the test sample from the collection region to the detection region of the membrane; and defining the collection region by separating the collection region from the receiving region prior to supplying the diluent to the collection region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for performing a lateral flow assay, the method comprising:
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providing a sampling membrane with a collection region and a detection region; conveying a test sample to the collection region by defining a channel in the membrane; defining a barrier between the collection region and the detection region so that the collection region has a known saturation volume that is less than about 100 microliters; saturating the collection region with a test sample so that a known volume of the test sample is contained in the collection region that corresponds to the known saturation volume of the collection region; removing the barrier between the collection region and detection region of the membrane; supplying a diluent to the collection region of the membrane to facilitate flow of the test sample from the collection region to the detection region of the membrane; and separating the channel from the collection region prior to supplying the diluent to the collection region. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification