Multiple immunochemistry assays on an element
View Patent ↗A method of analyzing a sample for one or more analytes of interest includes: providing an element having a base layer; a layer containing streptavidin; a spreading layer, wherein the streptavidin may or may not be in the spreading layer; providing immunocomponents and labeled immunoreactants which may be in the spreading layer or may be combined with the sample; dispensing the sample, and optionally the immunocomponents and a labeled immunoreactant onto the spreading layer at three or more areas, wherein each center of the three or more areas is substantially equidistance to the center formed by the three or more areas, and wherein each area contacts an adjacent area such that wash fluid flow in any direction will contact sample; washing the sample and label by directing the wash fluid at the center formed by the three or more areas, whereby the wash fluid equally flows over each of the three or more areas; and taking a measurement at each three or more areas to determine the presence or concentration of the one or more analyte. In a preferred embodiment, the element is a dry slide used on a diagnostic analyzer.
1. A method of analyzing a sample for one or more analytes of interest, comprising:
providing an element having
a base layer;
a layer containing streptavidin; and
a spreading layer, wherein the streptavidin may or may not be in the spreading layer;
providing immunocomponents and labeled immunoreactants which may be in the spreading layer or may be combined with the sample;
spotting the sample onto the spreading layer at three or more areas, and optionally the immunocomponents and a labeled immunoreactant, wherein each center of the three or more areas is substantially equidistant to the center formed by the three or more areas, and wherein each area contacts an adjacent area such that wash fluid flow in any direction will contact sample;
washing the sample and the labeled immunoreactant by directing a wash fluid at the center formed by the three or more areas, whereby the wash fluid flows away from the center towards the periphery of the element and equally flows over each of the three or more areas; and
taking a measurement at each of the three or more areas to determine the presence or concentration of the one or more analytes.
2. The method of analyzing a sample for one or more analytes of interest as claimed in claim 1 , wherein the immunocomponents comprise a capture or linking antibody or antigen.
3. The method of analyzing a sample for one or more analytes of interest as claimed in claim 1 , wherein the element comprises a dry slide used on a diagnostic analyzer.
4. The method of analyzing a sample for one or more analytes of interest as claimed in claim 1 , wherein the three or more areas are four areas having one of hepatitis A, hepatitis B, hepatitis C and human immunodeficiency virus assay.
5. The method of analyzing a sample for one or more analytes of interest as claimed in claim 1 , wherein the three or more areas include a cardiac panel which includes Troponin, CKMB, Myoglobin and proBNP.
6. The method of analyzing a sample for one or more analytes of interest as claimed in claim 1 , wherein the three or more areas include a fertility panel which includes HCG, FSH and LH.
7. The method of analyzing a sample for one or more analytes of interest as claimed in claim 1 , wherein the three or more areas are four areas and further comprising an incubation period before the wash step.
8. The method of analyzing a sample for one or more analytes of interest as claimed in claim 1 , wherein the immunocomponents and labeled immunoreactant are in the spreading layer before the sample is dispensed.
9. The method of analyzing a sample for one or more analytes of interest as claimed in claim 8 , wherein the immunocomponents comprise capture or linking antibodies/antigens.
10. The method of analyzing a sample for one or more analytes of interest as claimed in claim 1 , wherein the immunocomponents for each different analyte are in different layers.
11. The method of analyzing a sample for one or more analytes of interest as claimed in claim 10 , wherein the immunocomponents comprise the capture or linking antibodies/antigens.
12. The method of analyzing a sample for one or more analytes of interest as claimed in claim 1 , wherein the immunocomponents for each different assay are mixed with the sample and the sample is then divided into three or more aliquots, and further wherein a labeled immunoreactant for each analyte being detected/measured is added to one of the aliquots.
13. The method of analyzing a sample for one or more analytes of interest as claimed in claim 12 , wherein the immunocomponents comprise capture or linking antibodies/antigens.
14. The method of analyzing a sample for one or more analytes of interest as claimed in claim 1 , wherein the sample is separated into different aliquots and immunocomponents and labeled immunoreactant for each different assay are mixed with the sample in a different aliquot.
15. The method of analyzing a sample for one or more analytes of interest as claimed in claim 14 , wherein the immunocomponents comprise capture or linking antibodies/antigens.
16. The method of analyzing a sample for one or more analytes of interest as claimed in claim 1 , wherein the immunocomponents for each different analyte are in the spreading layer before the sample and labeled immunoreactant are added.
17. The method of analyzing a sample for one or more analytes of interest as claimed in claim 16 , wherein the immunocomponents comprise capture or linking antibodies/antigens.