Which of the following signs and symptoms is most closely associated with respiratory failure in a COPD patient?

Question

Quizplus · Accepted Answer

Changes in mental status are a sign of worsening respiratory failure in COPD patients, indicating hypoxia and hypercapnia affecting the brain. Bilateral wheezing, dyspnea on exertion, and excessive sputum production are common signs of COPD but do not specifically indicate respiratory failure.

Which of the Following Signs and Symptoms Is Most Closely