Fluid sample collection device
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United States of America Patent
Stats
-
Mar 17, 1981
Grant Date -
N/A
app pub date -
Jan 7, 1980
filing date -
Jan 7, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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.
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