While transferring a 34 year old male receiving a blood infusion, he complains of difficulty breathing. His skin is red and warm with urticaria. Vital signs are BP 70/40 P120 R 24. What should you administer?

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Multiple Choice

While transferring a 34 year old male receiving a blood infusion, he complains of difficulty breathing. His skin is red and warm with urticaria. Vital signs are BP 70/40 P120 R 24. What should you administer?

This scenario centers on recognizing anaphylaxis from a transfusion and the need for rapid epinephrine. In anaphylaxis, widespread histamine release causes airway edema, bronchospasm, and significant vasodilation with resulting hypotension. The patient’s sudden breathing difficulty, urticaria, warm/red skin, and a very low blood pressure point to this life-threatening reaction. Epinephrine is the best choice because it tackles both the airway and the circulatory collapse at once. Its alpha-1 effects cause vasoconstriction, reducing swelling and raising blood pressure; its beta-1 effects boost heart contractility and output; and its beta-2 effects relax bronchial smooth muscle, easing bronchospasm. This combination directly addresses the main threats in anaphylaxis. Oxygen is important to support oxygenation but does not stop the underlying reaction. Diphenhydramine and albuterol can help with symptoms, but they don’t reverse shock or prevent rapid airway deterioration as effectively as epinephrine. Administer epinephrine intramuscularly (1:1000), 0.3–0.5 mg for an adult, and repeat as dictated by protocol while stopping the transfusion and providing airway and fluid support.

This scenario centers on recognizing anaphylaxis from a transfusion and the need for rapid epinephrine. In anaphylaxis, widespread histamine release causes airway edema, bronchospasm, and significant vasodilation with resulting hypotension. The patient’s sudden breathing difficulty, urticaria, warm/red skin, and a very low blood pressure point to this life-threatening reaction.

Epinephrine is the best choice because it tackles both the airway and the circulatory collapse at once. Its alpha-1 effects cause vasoconstriction, reducing swelling and raising blood pressure; its beta-1 effects boost heart contractility and output; and its beta-2 effects relax bronchial smooth muscle, easing bronchospasm. This combination directly addresses the main threats in anaphylaxis.

Oxygen is important to support oxygenation but does not stop the underlying reaction. Diphenhydramine and albuterol can help with symptoms, but they don’t reverse shock or prevent rapid airway deterioration as effectively as epinephrine.

Administer epinephrine intramuscularly (1:1000), 0.3–0.5 mg for an adult, and repeat as dictated by protocol while stopping the transfusion and providing airway and fluid support.

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