초록 ▼

A blood collection device for receiving whole blood adapted to be centrifuged into phases of lighter and heavier specific gravity includes a container with proximal and distal ends and a penetrable stopper at the proximal end. A separator assembly inside the container includes a receptacle with a th

A blood collection device for receiving whole blood adapted to be centrifuged into phases of lighter and heavier specific gravity includes a container with proximal and distal ends and a penetrable stopper at the proximal end. A separator assembly inside the container includes a receptacle with a thixotropic barrier material therein. An aperture in the receptacle faces toward the distal end of the container. The barrier material has a specific gravity intermediate the specific gravities of the lighter and heavier phases of blood and is adapted to flow under its own influence through the aperture during centrifugation. The barrier material then travels to a position intermediate the lighter and heavier phases of blood separated during centrifugation and adheres to the inside wall of the container to form a barrier.

대표청구항 ▼

A blood collection device for receiving a sample of whole blood adapted to be centrifuged into a phase of lighter specific gravity and a phase of heavier specific gravity comprising: a collection container having an open end and a closed end; a stopper in said open end sealing same closed and being

A blood collection device for receiving a sample of whole blood adapted to be centrifuged into a phase of lighter specific gravity and a phase of heavier specific gravity comprising: a collection container having an open end and a closed end; a stopper in said open end sealing same closed and being penetrable by a needle for delivering blood to said container; a separator assembly positioned inside said container intermediate said open and closed ends adapted to move along a longitudinal axis therein and including a receptacle with a thixotropic barrier material in said receptacle, said receptacle having an aperture facing said closed end of the container, the size of said aperture and the viscosity of said thixotropic barrier material cooperating to prevent said barrier material from flowing out of said aperture under normal gravity conditions; said separator assembly having a specific gravity greater than the specific gravity of the heavier blood phase and adapted to move toward said closed end during centrifugation of said device, said barrier material having a specific gravity intermediate the specific gravities of the lighter and heavier phases of blood and adapted to flow under its own influence through said aperture during centrifugation of said device, travel to a position intermediate the lighter and heavier phases of blood separated during centrifugation and adhere to the inside wall of said container to form a barrier between said phases to maintain the separation therebetween; and said receptacle having a smaller transverse dimension than the inside wall of said container to provide annular clearance therebetween for blood passage toward the closed end of said container during the blood collection procedure and for the passage of barrier material toward the interface of the phases separated during centrifugation. The device of claim 1 wherein said assembly further includes a removable blood clotting activator at least on its surfaces bordering the annular clearance so that whole blood contacting said activator during passage through said clearance picks up said activator and rapid blood clotting is induced.