Which symptom is not typically part of a transfusion reaction?

• A. Increased urinary output
• B. Temperature change
• C. Tachycardia
• D. Flushing

Answer: (A)

Transfusion reactions usually trigger signs tied to an immune or inflammatory response to the transfused blood. Fever or a temperature change is a common early signal, and accompanying rapid heart rate (tachycardia) and flushing reflect the body's reaction to the donor blood. These symptoms arise from immune activation, histamine release, or hemolysis occurring during the transfusion. Increased urinary output does not reflect this immediate reaction pattern, so it isn’t a typical feature of transfusion reactions. If urine changes occur, they’re more related to other issues like volume status or kidney problems, not the classic transfusion reaction picture. That’s why increased urinary output stands out as not being part of a typical transfusion reaction.