A nurse is assisting to monitor a client who is receiving a blood transfusion. Which of the following findings should the nurse report to the charge nurse as an indication of an allergic blood transfusion reaction?

Choice A rationale A blood pressure of 184/92 mm Hg, indicating hypertension, is not a typical immediate sign of an allergic transfusion reaction, which often presents with hypotension due to vasodilation and increased capillary permeability caused by histamine release from mast cells and basophils. This finding might suggest circulatory overload or a pre-existing condition, but not specifically an allergic reaction. Choice B rationale Distended jugular veins indicate increased central venous pressure and are characteristic findings of circulatory overload (hypervolemia), which can occur with rapid blood product administration, especially in clients with compromised cardiac or renal function. An allergic reaction's primary manifestation is usually vasodilation and bronchoconstriction, not fluid volume excess. Choice C rationale Bilateral flank pain is a cardinal sign associated with an acute hemolytic transfusion reaction (AHTR), which results from the recipient's antibodies destroying donor red blood cells (RBCs), leading to hemoglobinuria and acute tubular necrosis, causing pain due to renal ischemia. Allergic reactions involve mast cell degranulation and histamine release. Choice D rationale Generalized urticaria, or hives, is a classic cutaneous manifestation of an allergic (mild hypersensitivity) transfusion reaction. It results from the release of chemical mediators like histamine from sensitized mast cells and basophils, causing local vasodilation, increased capillary permeability, and edema in the dermis, manifesting as itchy, raised welts.