Fast Five Quiz: Obstructive Sleep Apnea Key Aspects

Zab Mosenifar, MD

Disclosures

November 21, 2019

Apneic episodes are most prevalent during REM sleep. In some patients, they may occur exclusively during REM sleep. Episodes lasting 10 seconds or longer are considered clinically significant.

Routine laboratory tests usually are not helpful in the diagnosis of OSA in the absence of a specific indication. PFTs are not indicated to make a diagnosis of or treatment plan for OSA alone. However, a thyrotropin test should be performed on any patient with possible OSA who has other signs or symptoms of hypothyroidism, particularly in elderly individuals.

Pulmonary function tests are not indicated to make a diagnosis of or treatment plan for OSA alone. As with laboratory testing, the standard indications for such testing apply to all patients, with or without OSA.

At present, upper airway imaging is primarily used as a research tool. Routine radiographic imaging of the upper airway is not performed.

For more on the workup of OSA, read here.

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