| 摘要 |
<p>A centrifugation bowl for separating blood products, includes a cylindrical filter core disposed within the bowl preferably coaxial with the bowl and preferably rotating with the bowl. The centrifugation bowl (214) includes a rotating bowl body (302) with a closed bottom (306) and defining an enclosed separation chamber (304). The filter core (328) includes a filter membrane (330) that is sized to block at least white blood cells, but to allow plasma to pass through. The filter core is generally arranged within the separation chamber such that plasma is forced to pass through the filter core radially inwards before being removed from the centrifugation bowl. To this end, the filter core includes at its bottom portion a truncated conical portion (332) converging downwardly and ending at a predetermined height above the bowl bottom. The addition of the filter core provides an efficient, low-cost method for recovering a "purer" plasma fraction from a donor, to the exclusion of white blood cells. <IMAGE></p> |
