Because obstructive sleep apnea often includes loud snoring, a sleep study is used as part of a larger evaluation to help distinguish between the two conditions. Sleep studies can be performed in a sleep laboratory or in your own bed at home. Home sleep studies generally monitor breathing patterns, oxygen levels and heart rhythms. Studies in the sleep laboratory are more detailed and include brainwave and eye and leg movement monitors that are used to determine the type of sleep you are getting and to check for other sleep disorders.
If you have obstructive sleep apnea and are considering surgery, another test called drug-induced sleep endoscopy may be needed to determine the area where the blockage is occurring.