Sleep studies can help evaluate sleep apnea and other sleep disorders. A Sleep Medicine consultation can help determine whether testing is appropriate, which type of study may be useful, and how to interpret the results in the context of your symptoms.
The appropriate test depends on the clinical question. A sleep study is not automatically needed for every sleep complaint, and a home test is not interchangeable with a full overnight polysomnogram.
An overnight study that can record brain activity, eye movements, muscle activity, heart rate, breathing, oxygen levels and movements during sleep. It is the standard diagnostic test for adult OSA when a sleep study is indicated and is also used for other sleep disorders.
A portable home test used for selected adults with suspected obstructive sleep apnea. It is not appropriate for every patient, and an inconclusive or technically inadequate study may require polysomnography.
A daytime test that measures how quickly a person falls asleep during a series of scheduled nap opportunities. It may be used when excessive daytime sleepiness or disorders such as narcolepsy require objective assessment.
A daytime test that evaluates the ability to remain awake and alert under defined conditions. It may be useful in selected situations where wakefulness or safety is part of the clinical question.
Total recording time, total sleep time, sleep efficiency and the distribution of sleep stages may be reported.
Depending on the study and question, the report may include apneas, hypopneas, respiratory disturbance measures, oxygen saturation and related breathing findings.
Arousal indices, periodic limb movements and other movement-related findings may be included when relevant.
Heart rate and other recorded physiological signals can help place the main sleep findings into clinical context.
For selected adults with a high likelihood of uncomplicated moderate-to-severe OSA, PSG or a technically adequate HSAT may be used. PSG is preferred in several situations where another sleep disorder or a more complex breathing problem is suspected.
An online Sleep Medicine consultation can be used to review an existing PSG, HSAT or selected daytime sleep test report, connect the findings with your symptoms, and discuss what may need to happen next.
PSG, HSAT, MSLT, MWT or another sleep-related investigation can have different purposes and limitations.
Key respiratory, oxygenation, sleep-stage, arousal and movement measures can be considered in context rather than as isolated numbers.
Snoring, witnessed breathing pauses, insomnia, daytime sleepiness, restless sensations and other symptoms help determine clinical relevance.
The appropriate next step may be reassurance, further testing, treatment review or evaluation for another sleep disorder.
Dr. Prakash Kothari G provides online Sleep Medicine consultations for adults and children. You can discuss an existing sleep study, PSG, HSAT or selected daytime sleep test and understand what the findings may mean for your symptoms and next steps.
Bring the report and your symptoms to a Sleep Medicine consultation so the findings can be reviewed in the right clinical context.