She would set up transfusions if there was danger the human might die, and had to twice for Cassandra.
The patient with AML was receiving multiple transfusions of both red cells and platelets, and thus presented as a case of platelet refractoriness.
Furthermore, a number of patients never develop HLA antibodies nor do they become refractory, despite receiving multiple platelet transfusions.
See Gauchers News, April 2003 for an article on autologous blood transfusions.
This amount should be that quantity which is expected to be sufficient to avoid homologous blood transfusions.