Multiplanar lateral flow assay with diverting zone
First Claim
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1. A lateral flow device for detecting an analyte in a sample comprising:
- a sample compressor;
a test strip comprising a test zone and a diverting zone upstream of the test zone, wherein the diverting zone interrupts lateral flow on the test strip;
a conjugate comprising a first binding partner for the analyte and a label; and
a second binding partner for the analyte; and
a sample application zone where sample is applied to the lateral flow device, wherein the sample application zone is located in a location selected from the group consisting of;
i) on the test strip upstream of the detection zone;
ii) on the sample compressor; and
iii) on a sample collector comprising a sample collection portion for collection of the sample;
wherein a component selected from the group consisting of the conjugate, the second binding partner and both the conjugate and the second binding partner is not located on the test strip prior to use of the lateral flow device; and
wherein the sample compressor creates a bridge over the diverting zone to divert flow onto the sample compressor and return flow to the test strip at the end of the diverting zone.
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Abstract
A lateral flow device includes a sample compressor and a test strip comprising a diverting zone. The diverting zone, which may include a barrier and/or a gap or ditch, stops or impedes flow. Flow is reinitiated and diverted into an alternate plane by compression of a sample compressor. Flow returns to the original, lateral plane, at the end of the diverting zone.
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Citations
21 Claims
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1. A lateral flow device for detecting an analyte in a sample comprising:
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a sample compressor; a test strip comprising a test zone and a diverting zone upstream of the test zone, wherein the diverting zone interrupts lateral flow on the test strip; a conjugate comprising a first binding partner for the analyte and a label; and a second binding partner for the analyte; and a sample application zone where sample is applied to the lateral flow device, wherein the sample application zone is located in a location selected from the group consisting of;
i) on the test strip upstream of the detection zone;
ii) on the sample compressor; and
iii) on a sample collector comprising a sample collection portion for collection of the sample;wherein a component selected from the group consisting of the conjugate, the second binding partner and both the conjugate and the second binding partner is not located on the test strip prior to use of the lateral flow device; and wherein the sample compressor creates a bridge over the diverting zone to divert flow onto the sample compressor and return flow to the test strip at the end of the diverting zone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of running an assay of a sample on a lateral flow device comprising a test strip and a sample compressor, the method comprising the steps of:
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a) placing a sample on the lateral flow device; b) interrupting lateral flow on the test strip by including a diverting zone on the test strip; c) diverting the interrupted flow to the sample compressor by applying a pressure to the device using the sample compressor; and d) returning the flow to the test strip at the end of the diverting zone. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A lateral flow device for detecting an analyte in a sample comprising:
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a sample compressor; a sample collector comprising a sample collection portion for collection of the sample; a test strip comprising a sample application zone, a test zone and a diverting zone, wherein the diverting zone interrupts lateral flow on the test strip; a conjugate comprising a first binding partner for the analyte and a label; and a second binding partner for the analyte; wherein a component selected from the group consisting of the conjugate, the second binding partner and both the conjugate and the second binding partner is not located on the test strip prior to use of the lateral flow device; wherein the sample compressor, the sample collector, and the test strip form a vertical stack to apply the sample to the test strip by compression; wherein the sample compressor reinitiates flow by creating a bridge over the diverting zone and diverting flow onto the sample compressor and returning flow to the test strip at the end of the diverting zone; and wherein the sample collector is located between the sample compressor and the test strip in the vertical stack.
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21. A method of running an assay of a sample on a lateral flow device comprising a test strip, the method comprising the steps of:
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a) placing a sample collector comprising a sample collection portion with the sample in a vertical stack between a sample compressor and a sample application zone of the test strip; b) interrupting lateral flow on the test strip by including a diverting zone on the test strip; c) diverting the interrupted flow to the sample compressor by applying a pressure to the vertical stack using the sample compressor; and d) returning the flow to the test strip at the end of the diverting zone.
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Specification