Diagnostic devices with fluid reservoirs and associated methods and kits

1. A device for analyzing a sample, the device comprising:

a test strip including at least one reagent configured to detect SARS-CoV-2;

a housing base configured to retain the test strip; and

a housing cover configured to couple to the housing base to at least partially enclose the test strip, wherein the housing cover includes;

a fluid reservoir configured to hold a solution for hydrating a sample swab, and

an aperture spaced apart from the fluid reservoir and configured to receive the sample swab and direct the sample swab into direct contact with the test strip.

2. The device of claim 1 wherein the housing cover includes a raised portion, and the aperture is in the raised portion.

3. The device of claim 2 wherein the raised portion has a height of at least 2 cm above a remaining portion of the housing cover.

4. The device of claim 2 wherein the raised portion includes an interior cavity, and the fluid reservoir is within the interior cavity.

5. The device of claim 1 wherein the housing cover includes a guide structure near the aperture and configured to limit an insertion depth of the sample swab into the aperture.

6. The device of claim 5 wherein the guide structure includes a stop surface at least partially surrounding the aperture, and the stop surface is configured to engage the sample swab to limit the insertion depth.

7. The device of claim 6 , further comprising the sample swab, wherein the sample swab includes a handle portion configured to engage the stop surface.

8. The device of claim 7 wherein the guide structure is configured to control an insertion angle of the sample swab so the sample swab is substantially vertical when in direct contact with the test strip.

9. The device of claim 7 wherein the handle portion is configured to restrict an insertion depth of the sample swab into a patient's body.

10. The device of claim 1 wherein:

the housing cover includes an inner surface having one or more struts, and

when the housing cover is coupled to the housing base, the one or more struts apply pressure to a portion of the test strip to facilitate fluid flow therethrough.

11. The device of claim 1 , further comprising the solution for hydrating the sample swab, wherein the solution is in the fluid reservoir and the fluid reservoir is covered by a sealing element.

12. The device of claim 1 wherein the housing cover includes a window configured to expose a readout portion of the test strip.

13. A device for analyzing a sample, the device comprising:

a test strip including at least one reagent configured to detect SARS-CoV-2;

a housing base configured to retain the test strip;

a housing cover configured to couple to the housing base to at least partially enclose the test strip, wherein the housing cover includes;

a fluid reservoir configured to hold a solution for eluting a sample from a sample swab, and

an aperture at a bottom portion of the fluid reservoir and above a portion of the test strip; and

a slidable sealing element covering the aperture and configured to move between a first position in which the sealing element separates the fluid reservoir from the test strip and a second position in which the sealing element allows eluted sample to flow from the fluid reservoir onto the test strip.

14. The device of claim 13 wherein the fluid reservoir includes at least one extraction structure configured to contact the sample swab to enhance sample elution from the sample swab.

15. The device of claim 14 wherein the at least one extraction structure includes a plurality of vertical ribs.

16. The device of claim 13 , further comprising the sample swab, wherein the sample swab includes a handle portion configured to engage the fluid reservoir.

17. The device of claim 16 wherein engagement between the handle portion and the fluid reservoir limits an insertion depth of the sample swab.

18. The device of claim 16 wherein engagement between the handle portion and the fluid reservoir constrains the sample swab to a substantially vertical orientation.

19. The device of claim 16 wherein the handle portion is configured to restrict an insertion depth of the sample swab into a patient's body.

20. The device of claim 13 wherein the housing cover includes a recess configured to store the sample swab.

21. The device of claim 20 wherein the recess includes a window configured to expose a readout portion of the test strip.

22. The device of claim 20 , further comprising:

a first label covering the fluid reservoir;

a second label covering the recess; and

a third label preventing removal of the sealing element from the device.

23. The device of claim 13 wherein the sealing element includes a first end portion configured to cover the aperture and a second end portion extending outside the housing cover and the housing base, the second end portion being configured as a pull tab for removing the first end portion from the aperture.

24. A device for analyzing a sample, the device comprising:

a test strip including at least one reagent configured to detect SARS-CoV-2;

a housing base configured to retain the test strip; and

a housing cover configured to couple to the housing base to at least partially enclose the test strip, wherein the housing cover includes:

a fluid reservoir configured to hold a solution for hydrating a sample swab, wherein the fluid reservoir is spaced laterally apart from the test strip along the length and width of the housing cover, and

an aperture configured to permit transfer of a sample from the sample swab onto the test strip.

25. The device of claim 24 , wherein the aperture is spaced apart from the fluid reservoir and configured to receive the sample swab and direct the sample swab into direct contact with the test strip.

26. The device of claim 25 wherein the housing cover includes a raised portion, and the aperture is in the raised portion.

27. The device of claim 26 wherein the raised portion includes an interior cavity, and the fluid reservoir is within the interior cavity.