초록 ▼

An evacuated blood sample collection tube is provided with a stopper carrying a one-way valve for preventing blood drawn into the tube from flowing back to the patient, and for preventing blood trapped in the valve after a sample has been taken, from flowing to the sample during centrifugal blood ph

An evacuated blood sample collection tube is provided with a stopper carrying a one-way valve for preventing blood drawn into the tube from flowing back to the patient, and for preventing blood trapped in the valve after a sample has been taken, from flowing to the sample during centrifugal blood phase separation. The valve includes an elastomeric valve member and a ring member which moves in response to centrifugal forces to a position in which it applies pressure on the valve member to maintain the valve closed during centrifugation.

대표청구항 ▼

A blood sample collection device adapted to receive a blood sample and to be centrifuged for separating the blood phases comprising an evacuated container, a stopper closing one end of said container, and a valve in said container between said stopper and the opposite end of said container defining

A blood sample collection device adapted to receive a blood sample and to be centrifuged for separating the blood phases comprising an evacuated container, a stopper closing one end of said container, and a valve in said container between said stopper and the opposite end of said container defining a first chamber between said stopper and said valve, and a second chamber between said valve and said opposite end of said container, said stopper being pierceable by a needle for connecting a source of blood in fluid communication with said first chamber, said valve being responsive to fluid communication with said source of blood to open said valve and allow blood to flow therethrough to said second chamber, and valve securing means in said container responsive to centrifugal forces upon centrifugation of said container to maintain said valve closed during continued centrifugation of said container.