PEDIATRICS Vol. 56 No. 5s November 1975, pp. 880-882
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Blood Gas in Exercise-Induced Bronchospasm: A Review

Roger M. Katz M.D.1, Sheldon C. Siegel M.D.1, and Gary S. Rachelefsky M.D.1

1 Department of Pediatrics, UCLA School of Medicine, Los Angeles, California

Exercise-induced bronchospasm (EIB) in some cases of asthma is related to hypocapnia, hypoxemia, and acidosis, but studies have shown that children do not develop as abnormal Pco2, Po2, or pH levels with the induction of EIB. Gradient changes of alveolar-arterial oxygen differences reveal ventilation perfusion abnormalities existing at the onset of exercise in those patients who do develop EIB.