Patent ID: 7927563

Claim:
A kit for containing biological fluid and draining a constituent of the biological fluid, the kit comprising: (A) a barrel, which has a first static opening for receiving the biological fluid; (B) a piston assembly, disposed within the barrel, that comprises a shut-off valve, wherein the shut-off valve is configured to form a second movable opening for receiving or draining the constituent when the shut-off valve is engaged to be open; (C) a removable element that is configured to aspirate the biological fluid through the first static opening, wherein the removable element is configured to move the piston assembly, without engaging the shut-off valve, so that the first static opening receives the biological fluid; (D) a drainage element configured to engage the shut-off valve, such that the shut-off valve opens and the second movable opening receives the constituent; and (E) an interacting element, at least a portion of which is positioned in the barrel and which is configured to engage the shut-off valve, such that the shut-off valve opens and the second moveable opening receives a substance, and a sealing element that is configured to seal the first static opening when the shut-off valve opens, wherein the interacting element comprises (a) a rod and (b) an adapter element, a portion of which is positioned in the rod, that is configured to transport the substance.