What is the role of arterial blood gas analysis in the workup of hypoventilation syndromes?

Updated: Jul 22, 2021
  • Author: Jazeela Fayyaz, DO; Chief Editor: Guy W Soo Hoo, MD, MPH  more...
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Alveolar hypoventilation can be documented by the presence of hypercapnia or elevated PaCO2 (>45 mm Hg). In addition, PaO2 should be evaluated because hypoxemia may be present and frequently is associated with alveolar hypoventilation.

HCO3 and pH should be evaluated to determine the presence of acute or chronic acidosis and the degree of compensation.

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