Patent ID: 9669152
Date: 2017-06-06
CPC Classifications: A61M,B04B

Claim:
1. A method for controlling a blood component separation device comprising a centrifugal separator and configured to separate a predetermined blood component from blood, said method comprising cycles of steps (a) through (d) (a) a centrifugal separation step introducing whole blood drawn from a donor into the centrifugal separator to separate the whole blood into a plurality of blood components and temporarily storing at least part of a first separated blood component in a temporary storage container, (b) a critical flow step introducing said first separated blood component into the centrifugal separator together with whole blood, and (c) a circulation/acceleration step, preformed after a predetermined amount of the first separated blood component is separated in the critical flow step, in which (d) a blood returning step for returning to the donor blood components remaining after collecting at least some of the second component, wherein in at least some cycles the whole blood drawn from the donor in step (a) comprises the whole blood transferred to the temporary storage in a previous cycle and whole blood drawn from the donor in the current cycle.