Apheresis
分离性输血af-eh-RE-sis
释义：from assimilated form of apo "from, off" (see apo-) + hairein "to take" (see heresy)
A procedure in which blood is withdrawn, a portion is separated and retained, and the remainder is returned to the donor; apheresis may be used as a suffix with a root meaning the fraction retained, such as plasmapheresis, leukapheresis