When are arterial blood gas (ABG) determinations indicated in the diagnosis of status asthmaticus?

Updated: Jun 17, 2020
  • Author: Constantine K Saadeh, MD; Chief Editor: John J Oppenheimer, MD  more...
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ABG determinations are indicated when the peak expiratory flow (PEF) rate or the forced expiratory volume in 1 second (FEV1) is less than or equal to 30% of the predicted value or when the patient shows evidence of fatigue or progressive airway obstruction despite treatment.

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