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학습 자료 둘러보기 →Monitor vital capacity and respiratory effort frequently. A decline in vital capacity to below 15-20 mL/kg or the presence of shallow respirations signals impending respiratory failure.
Even with stable oxygen saturation, a falling vital capacity indicates weakening of the diaphragm and intercostal muscles, requiring preparation for mechanical ventilation.
Do not rely solely on pulse oximetry; hypercapnia from hypoventilation precedes hypoxemia. Bulbar dysfunction with dysphagia increases aspiration risk but is secondary to the priority of maintaining ventilation.
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