Centrifuge apparatus comprising a piston displaceable in a cylindrical member and an optical blood cell detector

摘要

When the blood in the container 110 is centrifuged into fractions, plasma and cells, the piston rod 8 is drawn up so that firstly the plasma portion is transferred between top and bottom chambers of the container via narrow channels including a slit in a top extension 90 of the container. As soon as blood cells are detected in the slit by optical detector 130 the controller 131 prevents further withdrawal of the piston rod 8 so that the blood cells are not transferred into the bottom chamber to interfere with the later recovery of fibrin monomer from the plasma fraction.