Chapter 42: Respiratory Insufficiency—Pathophysiology, Diagnosis, Oxygen Therapy

Chapter 42: Respiratory Insufficiency—Pathophysiology, Diagnosis, Oxygen Therapy

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

1. In patients with a chronic hypercapnia (elevated pCO₂), the normal ______ drive to breathe is replace with a ________ drive.
2. Hypoxic, hypercapnic
3. Hypercapnic, hypoxic
4. Apneustic, pneumotaxic
5. Pneumotaxic, apneustic

ANS: B

2. A chronic smoker has an arterial pO₂ of 60 mmHg and an arterial pCO₂ of 48. What will happen to arterial pO₂ and pCO₂ if the patient is placed on 100% O₂?

Arterial pO₂                Arterial pCO₂

1. ­ ¯
2. ¯ ¯
3. ­ ­
4. ¯ ­

ANS: C

3. Which parameter decreases with emphysema?

1. Alveolar pCO₂
2. Cardiac output
3. Diffusion area
4. Pulmonary artery pressure

ANS: C

4. Oxygen therapy is most beneficial in which of the following situations? Lung function is normal.
5. Anemia
6. CO₂ retention (COPD)
7. Cyanide poisoning
8. High altitude

ANS: D