What is the importance of arousals in the evaluation of obstructive sleep apnea (OSA)?

Updated: Sep 15, 2020
  • Author: Himanshu Wickramasinghe, MD, MBBS; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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Arousals detected on PSG are important for the evaluation of the degree of sleep fragmentation. They may be the only clue to UA resistance syndrome (UARS) in a patient with daytime hypersomnolence if esophageal pressure is not monitored. Monitoring of esophageal pressure is not routinely performed in most laboratories because of the invasive nature of the procedure.

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