What is the recommended SpO2 range to maintain in children according to the American Heart Association's 2020 Pediatric Advanced Life Support Guidelines?

This question addresses pediatric respiratory management and oxygen therapy protocols. Knowledge of the American Heart Association 2020 guidelines is required to identify the target oxygen saturation levels that balance tissue oxygenation while avoiding the physiological risks of hyperoxia or hypoxia. Choice A rationale The guidelines recommend maintaining oxygen saturation at 94 percent or higher. This level ensures adequate arterial oxygen content for systemic delivery while minimizing the risks of lung injury or oxidative stress associated with excessive supplemental oxygen administration in children. Choice B rationale A saturation of 90 percent is generally considered hypoxic for a stable pediatric patient. Lower levels can trigger pulmonary vasoconstriction and impair metabolic processes, potentially leading to cellular dysfunction or cardiovascular instability if the underlying cause of hypoxia is not corrected. Choice C rationale While 99 percent is within normal limits, the guidelines emphasize titrating oxygen to maintain at least 94 percent. Aiming for 99 percent often involves unnecessary high-flow oxygen, which can cause hyperoxic tissue damage and suppress the natural respiratory drive. Choice D rationale An SpO2 of 85 percent indicates significant hypoxemia and requires immediate intervention. Normal ranges are typically 95 to 100 percent. Prolonged levels at 85 percent result in anaerobic metabolism, lactic acidosis, and potential end-organ damage due to insufficient oxygen supply.