A Child with a Chronic Disorder Complicated by Alveolar Hypoventilation

A child with a chronic disorder complicated by alveolar hypoventilation is placed on intermittent NPPV at night.What is the primary goal of this therapy?

A) To decrease the work of breathing
B) To decrease the need for inserting an endotracheal tube
C) To improve the quality of sleep and reduce daytime symptoms
D) To improve arterial oxygenation