How prevalent is residual EDS following treatment 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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Residual excessive daytime sleepiness (EDS) after apparently effective treatment with CPAP is a commonly encountered problem. An exact percentage of patients has not been determined but has been estimated at 5% in one study. [211] Residual EDS is generally considered present if the ESS score remains higher than 10 after treatment.

Some of these patients may not have been "optimally" treated; rather, they were put on a positive pressure setting which, during the sleep disorders center positive airway pressure study, is sufficient to correct OSA. They may not be optimally treated for a number of reasons that need to be considered first, before placing patients in this subgroup of patients.

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