Overview
Introduction
Hypoventilation is a failure of effective alveolar ventilation, so carbon dioxide accumulates even when the respiratory rate does not look dramatically abnormal.
REx-PN
REx-PN
Hypoventilation is a failure of effective alveolar ventilation, so carbon dioxide accumulates even when the respiratory rate does not look dramatically abnormal. The central nursing task is to distinguish chronic, compensated CO₂ retention from acute ventilatory failure and to identify why ventilation is inadequate. Obesity hypoventilation syndrome (OHS) is the main exam model: obesity, awake daytime hypercapnia, and no better neuromuscular, pulmonary, metabolic, or medication-related explanation. Obstructive sleep apnea commonly coexists, but OHS is defined by daytime hypercapnia rather than nocturnal obstruction alone. Stable patients need a planned PAP and weight-management strategy; patients who become acutely acidotic, confused, or unable to sustain ventilation need urgent ventilatory support.
Unlock full lesson + practice questions
8 more sections with scenarios, priorities, and review drills.
Final rapid review before practice
Next study step
Finish the lesson first, then choose a focused activity to apply what you just reviewed.
Continue studying
Sign in to save progress on this lesson.
Unlock the interactive lesson quiz with a plan that includes this REx-PN pathway. You can still explore topic-filtered questions from the bank hubs below.