In which of the following forms of asthma is heliox likely to be most beneficial?
A. intermittent asthma
B. mild persistent asthma
C. moderate persistent asthma
D. severe persistent asthma
ANS: D
A. Incorrect response: See explanation D.
B. Incorrect response: See explanation D.
C. Incorrect response: See explanation D.
D. Correct response: The evidence for the use of heliox in patients with asthma is conflicting. First line therapy with heliox is not warranted. Heliox appears to benefit patients with the most severe exacerbations and airflow obstruction. Early use of heliox may decrease the work of breathing and dyspnea, improve gas exchange, and prevent intubation in some patients.
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