Filtration method and device useable for removal of leukocytes and other blood components
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United States of America Patent
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May 11, 1999
Issued Date -
N/A
app pub date -
Jul 16, 1996
filing date -
Mar 10, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
The filtration method involves processing biological liquid from an enclosed flexible supply bag to a filtration media within a processing system wherein the flow of biological liquid within the system is restricted to allow the biological liquid to back up above the level of a port located upstream within the system and preventing gas from entering into the processing system through the port by maintaining the level of biological liquid above the port until the flow of biological liquid from the flexible supply bag ceases. The system automatically allows gas to enter into the system through the port when the flow of biological liquid ceases thereby draining the biological liquid into a receiving bag. The flow may be restricted by a narrow cross-sectional area within the processing system and the port may be covered by a hydrophobic filter media.
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