posttransfusion syndrome /-transfyo̅o̅″zhən/ [L, post, after, transfundere, to pour through; Gk, syn, together, dromos, course] , a complex of adverse reactions that may accompany or follow IV administration of blood or blood components. Reactions may include hemolytic effects, headache and back pain, allergies to an unknown component in donor blood, circulatory overloading, effects of cold blood that chill the patient’s cardiovascular system, and effects of microaggregates in stored blood.
