Liquid purification or separation – Processes – Separating
Patent
1995-01-13
1996-02-27
Kim, John
Liquid purification or separation
Processes
Separating
210782, 210789, 604 4, 604 5, 604 6, 494 37, A61M 3700, B01D 2126
Patent
active
054945925
ABSTRACT:
An apheresis apparatus and method is disclosed for increasing the purity and yield of platelets separated from donated whole blood in a centrifuge. The whole blood in the centrifuge is diluted by recirculating fluid, such as plasma or saline, at a first flow rate, to mix with further withdrawn whole blood prior to entering the centrifuge. As plasma is collected, it is recirculated through the centrifuge at a second flow rate to further improve the separation between the intermediate density components, i.e., platelets and white blood cells in the "buffy coat." The plasma is then recirculated through the centrifuge at a third flow rate and platelets are displaced out of the centrifuge while the plasma is recirculating through the centrifuge at the third flow rate.
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Jorgensen Glen E.
Knapp Tracey E.
Latham, Jr. Allen
Plante Joseph R.
Sibinga Theodoor H. S.
Haemonetics Corporation
Kim John
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