15 Lung Failure Symptoms You May Already Have (But Don’t Know!)

11. Confusion and Memory Problems (Hypoxia-Related Encephalopathy)

Why it happens: Low oxygen and high carbon dioxide impair brain function.

How it feels: Patients may appear forgetful, confused, irritable, or drowsy. In severe cases, coma may occur.

Medical Tests:

  • ABG: Confirms low PaO₂, high PaCO₂.
  • Neurological Exam: Assesses cognitive function.
  • MRI/CT Brain: If confusion persists.

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