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Chapter 42 Respiratory Insufficiency—Pathophysiology, Diagnosis, Oxygen Therapy
Complete Chapter Questions And Answers
Sample Questions
1. In patients with a chronic hypercapnia (elevated pCO2), the normal ______ drive to breathe is replace with a ________ drive.
A. Hypoxic, hypercapnic
B. Hypercapnic, hypoxic
C. Apneustic, pneumotaxic
D. 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
A.
B.
C.
D.
ANS: C
3. Which parameter decreases with emphysema?
A. Alveolar pCO2
B. Cardiac output
C. Diffusion area
D. Pulmonary artery pressure
ANS: C
4. Oxygen therapy is most beneficial in which of the following situations? Lung function is normal.
A. Anemia
B. CO2 retention (COPD)
C. Cyanide poisoning
D. High altitude
ANS: D
5. During severe pulmonary disease a stimulus for control of respiration is:
A. A decrease in arterial oxygen content
B. A decrease in arterial pCO2
C. A decrease in arterial pO2
D. An increase in arterial pH
ANS: C
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