A 2-year-old toddler was rescued after being submerged in a bathtub for approximately 3 minutes and brought to the emergency department. The child is currently awake but irritable, with a respiratory rate of 38 breaths per minute, oxygen saturation of 91% on room air, and a temperature of 35.5°C (95.9°F). The nurse notes mild intercostal retractions and fine crackles on lung auscultation. Laboratory results show mild metabolic acidosis. Which nursing action should the nurse prioritize during the first hour of care?

A. Begin intravenous fluid bolus immediately to correct metabolic acidosis is incorrect because mild metabolic acidosis in a drowning victim is typically secondary to hypoxia. The first priority is ensuring adequate oxygenation and ventilation; fluids may be necessary later for shock or hypotension but are not the immediate priority unless signs of hypovolemia are present. B. Administer humidified oxygen and monitor respiratory status closely, preparing for possible deterioration is correct because submersion injuries can result in secondary pulmonary injury, including noncardiogenic pulmonary edema, hypoxia, and respiratory distress. The child is showing mild hypoxemia (SpO2 91%), retractions, crackles, and mild metabolic acidosis, indicating early post-drowning respiratory compromise. Oxygen therapy, close monitoring, and preparation for escalation (intubation if needed) are the highest priority interventions in the first hour. C. Prepare the child for immediate endotracheal intubation and mechanical ventilation is incorrect because the child is currently awake, maintaining airway, and only mildly hypoxic. Immediate intubation is not indicated unless there is worsening respiratory distress, severe hypoxia, or altered mental status. D. Initiate antipyretic therapy to address hypothermia and prevent fever is incorrect because the child is hypothermic (35.5°C), not febrile. Hypothermia should be corrected with passive or active warming measures, not antipyretics. Fever prevention is not the first priority in this scenario.