Devices and methods for sample collection and analysis
View Patent ↗The present invention provides devices, methods, and kits for the collection of a solid or semi-solid sample and analysis for the presence, absence, or quantity of an analyte. The invention provides a collection slide having a first card and a second card. The first card has a sample collection area. The first and second cards have orifices allowing the passage of fluid through the sample collection area, and the cards are hingeably connected to each other. The invention also provides an assay device having a housing with a test element, a results window, and a docking area for receiving and engaging the collection slide. In one embodiment the collection slide and device can be used to detect the presence of fecal occult blood (human hemoglobin) in a stool sample. Many other embodiments are described herein.
1. A method of detecting the presence or absence of an analyte in a sample contained in a sample collection slide, comprising:
placing a collection slide containing the sample into a docking area of a device and transferring the sample from the slide to the device to detect the analyte in the sample, wherein the device comprises:
a docking area for receiving a portion of the collection slide and further comprises a sample transfer orifice with an absorbent transfer material disposed therein in fluid communication with a test element that further comprising a reagent; and
a results window for observing a test result of the test sample reacting with the test element; and
wherein the collection slide comprises a first water resistant card having a single eluent orifice and no reagent;
a second water resistant card hingeably connected to the first card and having a single solvent orifice and no reagent, the sample is applied to the collection slide when the slide is in an open position, the card is closed after the sample is applied and retains the sample therebetween the solvent and eluent orifices, wherein the single eluent orifice aligns with the single solvent orifice when the first water resistant card is juxtaposed with the second water resistant card;
applying an extraction buffer to the solvent orifice of the collection slide where the extraction buffer to pass through the sample area and into the absorbent transfer material and test element; and
observing a test result in the results window.
2. The method of claim 1 wherein the test element comprises, a bibulous matrix comprising a sample application zone in fluid communication with the transfer bead; a reagent zone comprising reagents for conducting an assay; and a detection zone comprising a test line for detecting the presence or absence of the analyte.
3. The method of claim 2 wherein the test line comprises specific binding molecules for the analyte.
4. The method of claim 2 wherein the test line contains reagents for conducting a chemical test.
5. The method of claim 1 wherein the analyte is human hemoglobin.
6. A kit for collecting a biological sample, comprising:
a collection slide comprising: a first water resistant card without a reagent having an inner surface and only a single eluent orifice;
a second water resistant card without a reagent hingeably connected to the first card and having an inner surface and only a single solvent orifice, the collection slide having an open position and a closed position, wherein the single solvent and single eluent orifices are aligned when the collection slide is in the closed position; and
a sample collection area on the first water resistant card to which sample is applied for collection, present between the solvent and eluent orifices when the collection slide is in the closed position; and
a device for detecting an analyte in a fluid comprising: a housing containing a test element that comprises a reagent, a docking area for engaging a portion of the collection slide and comprising a sample transfer orifice, with an absorbent transfer bead disposed therein and in fluid communication with the test element;
a results window for observing a test result;
a sample collector;
an envelope for containing a loaded collection device; and
instructions for use; provided in a package.
7. A kit according to claim 6 further comprising one or more bottles containing buffers for conducing an assay according to the instructions for use.