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US 5,258,126 AGranted
Method for obtaining platelets
AssigneePall Corporation
InventorsDavid B. Pall, Thomas C. Gsell
Life of this patent
Estimating the term…
Abstract
A method is provided for processing donated blood, particularly a platelet-containing solution such as platelet-containing plasma, involving separating blood into a red cell containing sediment layer and a supernatant layer, and passing the supernatant layer through a filter until the filter is blocked, thereby leaving platelets to be harvested. The preferred filter comprises a porous medium having a plurality of zones of progressively increasing density.
Claims10
A method of harvesting platelets from a platelet-containing solution comprising:
- separating the platelet-containing solution into a supernatant layer and a sediment layer containing red cells;
- and
- passing the supernatant layer through a filter until red cells block the filter, said filter including a porous medium having zones of different density.
A method for treating blood comprising:
- centrifuging blood to create a supernatant layer and a sediment layer;
- and
- passing the supernatant layer of the centrifuged blood through a porous medium until red blood cells block the porous medium, said filter including a porous medium having zones of different density.
Dependencies are inferred from the claim text.