A nurse is reviewing congenital heart circulation with a parent. Which of the following fetal structures normally shunt blood away from the lungs and liver and should close after birth?

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.

A. Instruct the child to avoid weight-bearing activities indefinitely is incorrect because prolonged immobilization is unnecessary and can lead to muscle atrophy and delayed functional recovery. Weight-bearing should be restricted only as medically indicated during the initial healing phase.

B. Assure the parents that damage to the growth plate will not affect the length or shape of the child's limb is incorrect because growth plate (physeal) fractures can lead to limb length discrepancies or angular deformities if not properly monitored. Providing false reassurance could delay necessary interventions.

C. Explain that the fracture will heal at the same rate as an adult fracture regardless of age or growth plate involvement is incorrect because pediatric fractures involving the growth plate may have unique healing patterns and potential complications, including growth disturbances.

D. Educate the family on the importance of follow-up visits for growth assessment and early detection of limb length discrepancies is correct because distal femoral physeal fractures carry a high risk for growth disturbances, including limb shortening or angular deformities. Regular follow-up with imaging and growth monitoring allows early identification and intervention, minimizing long-term functional and cosmetic complications.