<unk>  is an apheresis procedure by which erythrocytes (red blood cells) are separated from whole blood. It is an extracorporeal blood separation method whereby whole blood is extracted from a donor or patient, the red blood cells are separated, and the remaining blood is returned to circulation.
Erythrocytapheresis
Autosplenectomy
Plateletpheresis
Photopheresis
Splenectomy
Platelet transfusion
Leukapheresis
Plasmapheresis