Which interventions are appropriate for a patient who is in anaphylactic shock from a bee sting? (Select all that apply.)

Choice A rationale Anaphylactic shock is a systemic, acute, hypersensitivity reaction mediated by mast cells and basophils releasing mediators, primarily histamine, not a bacterial infection. The immediate priority is reversing the life-threatening physiological effects, such as massive vasodilation and bronchoconstriction, not culturing or empirically treating for a bacterial process. Antibiotics are not the appropriate initial intervention. Choice B rationale Diphenhydramine is an H1 receptor antagonist (antihistamine) that blocks the effects of histamine released from mast cells and basophils during the anaphylactic response. Histamine causes vasodilation, increased capillary permeability, and smooth muscle contraction (e.g., bronchospasm). Blocking these receptors helps mitigate these detrimental vascular and respiratory effects, supporting blood pressure and ventilation. Choice C rationale Severe anaphylaxis causes life-threatening airway edema and bronchospasm due to mediator release, leading to respiratory failure. Laryngeal edema can rapidly obstruct the airway. Preparing for surgical management, such as a cricothyroidotomy or tracheostomy, is critical if conventional methods (e.g., epinephrine, intubation) fail to establish a patent, functional airway, ensuring oxygenation. Choice D rationale Theophylline (a methylxanthine) and its derivative aminophylline are bronchodilators that relax smooth muscles in the airways. They inhibit phosphodiesterase, increasing intracellular cyclic adenosine monophosphate (cAMP), which promotes bronchodilation. This action directly counteracts the bronchospasm component of anaphylaxis, improving airflow and oxygen delivery, which is vital in this emergency. Choice E rationale The patient in anaphylactic shock requires immediate, aggressive intervention, including epinephrine (primary treatment), airway management, and volume resuscitation, as they are at risk for hypoxia and circulatory collapse. Offering sips of water is a low-priority intervention that could delay life-saving treatment and carries a risk of aspiration due to potential laryngeal edema or altered mental status.