Device and methods for collection of biological fluid sample and treatment of selected components
A collection device and a method for collecting a biological sample, particularly whole blood, includes a separating member to separate the whole blood into its components, and at least reagent positioned to selectively interact with a component of the separated sample. The reagent is able to selectively interact with the plasma/serum, and is prevented from contacting or interacting with the whole blood.
1. A device for collecting a biological sample, comprising:
a container having a first open end, and a closed bottom end;
a separating member disposed in the container, the member capable of separating the sample into discrete components;
at least one reagent release mechanism comprising a sealed chamber positioned above the separating member; and
at least one reagent located within the sealed chamber of the reagent release mechanism; wherein the reagent release mechanism prevents contact between the reagent and the biological sample until after centrifugation and separation of the biological sample into discrete components,
wherein activation of the reagent release mechanism unseals the chamber and allows the reagent to contact the discrete component.
2. The device of claim 1 , wherein the separating member is located at the closed bottom end.
3. The device of claim 1 , wherein the separating member is located intermediate of the top and bottom ends.
4. The device of claim 1 , wherein the reagent release mechanism is located at the first open end.
5. The device of claim 1 , wherein the container is a tube having a closure in the first open end.
6. The device of claim 5 , wherein the reagent release mechanism is secured to the closure.
7. The device of claim 5 , wherein the reagent release mechanism is supported by an integral structural member on the inside walls of the tube.
8. The device of claim 7 , wherein the structural member comprises integral ribs.
9. The device of claim 5 , wherein the tube is evacuated to a pressure lower than atmospheric pressure.
10. The device of claim 1 , wherein the reagent is a nucleic acid stabilizing agent.
11. The device of claim 10 , wherein the nucleic acid stabilizing agent is positioned to selectively contact a plasma or serum component separated from the whole blood.
12. The device of claim 1 , wherein the separating member is a mechanical separating element.
13. The device of claim 1 , wherein the separating member is a gel.
14. The device of claim 13 , wherein the gel separating member is physically separated from the reagent.
15. The device of claim 1 , wherein the separating member has a density intermediate of plasma and remaining cellular components, or intermediate of serum and red blood cells.
16. The device of claim 1 , wherein the separating member is a filter.
17. The device of claim 1 , wherein the reagent is in a form selected from the group consisting of a solution, suspension or other liquid, a pellet, a tablet, a capsule, a spray-dried material, a freeze-dried material, a powder, a particle, a gel, crystals or a lyophilized material.
18. The device of claim 1 wherein the reagent is a protein stabilizer.
19. The device of claim 1 , wherein activation of the reagent release mechanism allows the reagent to contact the desired discrete component of the separated biological sample while remaining free of contact with undesired components.
20. The device of claim 1 , wherein the reagent release mechanism comprises a passive activation system.
21. The device of claim 20 , wherein the reagent release mechanism allows the reagent to contact the discrete component by disengagement of a cover from the reagent release mechanism assembly.
22. The device of claim 20 , wherein the reagent release mechanism allows the reagent to contact the discrete component by the opening of a reagent exit doorway in the release mechanism assembly.
23. The device of claim 1 , wherein the reagent release mechanism is activated by centrifugation of the biological sample.
24. The device of claim 1 , wherein the reagent release mechanism is activated by a manual act after the separation of the biological sample.
25. The device of claim 1 , wherein the container further comprises an anticoagulant.