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Chapter 32 Chronic Obstructive Pulmonary Disease Sample Questions

1. CJ is a 60 year old man who presented to the emergency department because of a severe cough characterized by purulent sputum and wheezing. CJ has COPD and the admitting physician at ED suspects that CJ is having acute COPD exacerbation. CJ obviously is acutely out of breath. To confirm this, what is used to measure ventilation in patients like CJ?

A. Alpha1 antitrypsin
B. Arterial blood gas test
C. Pulse oximetry
D. Spirometer

Answer

Ans: B

Tips: Arterial blood gas determination is the gold standard to assess oxygenation and ventilation during an exacerbation. In COPD, the amount of air breathe into and out of the lungs is impaired. Arterial blood gases measure the oxygen and carbon dioxide levels in the blood and determine the body's pH and sodium bicarbonate levels. ABGs are important in forming a diagnosis of COPD as well as in determining the need for and adjusting the flow rate of any needed oxygen therapy.

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