What is the role of arterial blood gas (ABG) analysis in the diagnosis of anxiety disorders?

Updated: Mar 27, 2019
  • Author: Nita V Bhatt, MD, MPH; Chief Editor: David Bienenfeld, MD  more...
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Answer

Arterial blood gas analysis is useful in confirming hyperventilation (respiratory alkalosis) and excluding hypoxemia or metabolic acidosis. The presence of hypoxemia with hypocapnia or a widened alveolar-arterial (A-a) gradient should increase the suspicion of pulmonary embolus.


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