Standardization of blood product preparation by means of a "centrifugation index".

A centrifugation index for blood product preparation is proposed. This index, calculated from the domain of ultracentrifugation, is most applicable to describe the effects of centrifugation of large volumes than the relative centrifugal force and centrifugation time commonly used. The value of such an index is illustrated by the calculation of the minimum centrifugation time required for the preparation of platelet-poor plasma with seven different centrifuges.