Method for accessing the contents of a closed vessel containing a specimen retrieval device
View Patent ↗Method for obtaining a fluid sample from a collection device which includes assembling cap and fluid-holding vessel components of the collection device to contain and isolate a specimen retrieval device adjacent a side wall of the vessel. The position of the specimen retrieval device within the collection device is such that the specimen retrieval device does not substantially interfere with the movement of a fluid transfer device into or out of the assembled collection device. The fluid transfer device is used to draw and remove a fluid substance from the collection device for analysis.
1. A method for accessing the fluid contents of a vessel, the method comprising the following ordered steps:
(a) providing a specimen retrieval device to the vessel;
(b) closing an open end of the vessel with a cap, the cap having a tapered inner wall that is configured to position the specimen retrieval device along a side wall of the vessel, whereby an upper end of the specimen retrieval device is positioned adjacent the tapered inner wall of the cap and laterally spaced from the axis of the vessel;
(c) piercing the tapered inner wall of the cap with a fluid transfer device;
(d) moving the fluid transfer device into the vessel along a fluid transfer device pathway that is laterally spaced from the upper end of the specimen retrieval device;
(e) drawing at least a portion of the fluid contents into the fluid transfer device; and
(f) removing the fluid transfer device from the vessel.
2. The method of claim 1 , wherein the cap and vessel include mated threads for fixedly associating the cap and vessel.
3. The method of claim 2 , wherein step (b) provides a substantially leak-proof seal between the cap and vessel.
4. The method of claim 1 , wherein the cap and vessel are each formed of an injection molded plastic.
5. The method of claim 1 , wherein the specimen retrieval device is a swab.
6. The method of claim 5 , wherein the swab includes a score line to facilitate snapping-off an upper portion of the swab above the score line.
7. The method of claim 6 further comprising the steps of snapping-off and removing the upper portion of the swab prior to step (b).
8. The method of claim 1 , wherein the fluid transfer device is a plastic pipette tip.
9. The method of claim 8 , wherein step (c) requires applying a force of less than about 8 pounds to the cap.
10. The method of claim 1 , wherein the tapered inner wall of the cap comprises a plurality of radially extending striations.
11. The method of claim 1 , wherein the fluid contents of the vessel contain a nucleic acid analyte.
12. The method of claim 11 further comprising the step of amplifying a nucleic acid sequence contained in the nucleic acid analyte.
13. The method of claim 12 , wherein the amplifying step is performed using a polymerase chain reaction procedure.
14. The method of claim 12 , wherein the amplifying step is performed using a transcription-mediated amplification procedure.
15. The method of claim 12 further comprising the step of detecting the presence of the nucleic acid analyte in the fluid contents of the vessel.
16. The method of claim 11 further comprising the step of detecting the presence of the target nucleic acid analyte in the fluid contents of the vessel.
17. The method of claim 1 further comprising the step of inhibiting the release of an aerosol or bubbles from the closed vessel after step (c).
18. The method of claim 17 , wherein the inhibiting step is carried out using a wick contained within the cap or an overcap.
19. The method of claim 18 , wherein the wick is a pile fabric.
20. The method of claim 12 further comprising, after step (c), the step of inhibiting the release of an aerosol or bubbles from the closed vessel.
21. The method of claim 20 , wherein the inhibiting step is carried out using a wick contained within the cap or an overcap.
22. The method of claim 21 , wherein the cap or overcap includes a seal for retaining the wick within the cap or overcap.
23. The method of claim 22 , wherein the wick is a pile fabric.
24. The method of claim 1 , wherein the tapered inner wall is a generally conical inner wall.