What are the Office of Technology Assessment of the Agency of Health Care Policy and Research recommended polysomnography (PSG) procedures?

Updated: Apr 29, 2020
  • Author: Carmel Armon, MD, MSc, MHS; Chief Editor: Arlen D Meyers, MD, MBA  more...
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Answer

Answer

In 1992, the Office of Technology Assessment of the Agency of Health Care Policy and Research recommended, in an evidence-based assessment, declared two tests as having been studied sufficiently. Both tests are performed in a sleep laboratory.

The first is overnight polysomnography (PSG), which is an overnight recording of the patient's sleep. Typically for a baseline study, the patient is observed sleeping naturally without any treatment, but if a signficant amount of sleep-disordered breathing (AHI> 20–30 events per hour) is seen in the first hours of the study, a split-night study is performed during which positive airway pressure (PAP) is started. Titration studies may also be done with initiation of PAP from the start of the study to determine optimal settings.

The second is multiple sleep latency testing (MSLT), which records multiple naps throughout a day. Maintenance of wakefulness testing (MWT) can also be performed, which determines how long wakefulness can be maintained.


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