Patent ID: 6464624
Filing Date: 2002-10-15
Classification: B04B

Abstract:
A method for collecting a plasma fraction from whole blood, the method comprising the steps ofproviding a rotary centrifugation bowl having a rotary axis and a tubular core with a permeable side wall surrounding said axis, said bowl also having a bottom wall and a side wall spaced radially from the core side wall; delivering whole blood via a conduit into the bowl; rotating the bowl about said axis at a speed such that the plasma fraction of the whole blood becomes separated from other more dense components of the whole blood due to centrifugal force and is forced under pressure from the other blood components through the core side wall into the interior of the core while the other blood components remain outside the core; conducting the plasma fraction from the interior of the core while the bowl is rotating; stopping the delivery of whole blood into the bowl and the rotation of the bowl so that the other blood components settle to the bottom of the bowl, and removing the other blood components from the bottom of the bowl.