A nurse is monitoring a client who is receiving a blood transfusion. Which of the following findings indicates an allergic transfusion reaction?

Choice A rationale A blood pressure of 184/92 mm Hg, indicating severe hypertension, is not a typical immediate finding in an allergic transfusion reaction. While some reactions can cause hemodynamic changes, acute allergic reactions more commonly present with symptoms related to histamine release and vasodilation, rather than significant hypertension. Choice B rationale Bilateral flank pain is a hallmark symptom of an acute hemolytic transfusion reaction, where red blood cells are destroyed intravascularly, leading to hemoglobinuria and renal damage. This pain results from renal ischemia and is distinct from the histamine-mediated responses seen in allergic reactions. Choice C rationale Distended jugular veins (JVD) are a sign of fluid volume overload, often seen in transfusion-associated circulatory overload (TACO), where the cardiovascular system cannot handle the infused blood volume. This indicates increased central venous pressure, a different mechanism than an allergic response. Choice D rationale Generalized urticaria, characterized by widespread hives or wheals, is a classic manifestation of an allergic transfusion reaction. This occurs due to the release of histamine and other inflammatory mediators from mast cells and basophils in response to plasma proteins in the donor blood, causing widespread vasodilation and increased capillary permeability. .