How to Understand Your Sleep Study Report
Learn what common sleep-study report terms mean, including AHI, oxygen saturation and sleep stages, and what to discuss with your doctor.
A sleep-study report may contain medical abbreviations, numbers and graphs. Understanding a few common terms can help you prepare useful questions for your doctor. Your report should always be interpreted alongside your symptoms, medical history and the type of test performed.
What is AHI?
AHI stands for Apnea-Hypopnea Index. It describes the average number of apneas and hypopneas recorded per hour of sleep during an appropriate sleep study. AHI is often used when assessing obstructive sleep apnea, but it is not the only factor used for diagnosis or treatment decisions.
What does SpO₂ mean?
SpO₂ is an estimate of blood oxygen saturation measured using a pulse oximeter. A report may show average oxygen saturation, the lowest recorded value and time spent below a specified level. These measurements need careful interpretation.
What are sleep stages?
A full polysomnography study may identify non-REM and REM sleep. Not every home sleep apnea test measures sleep stages directly because some home tests do not record brain activity.
Why does the type of test matter?
Different tests collect different information. If a test is inconclusive or does not explain your symptoms, your clinician may recommend further assessment.
Questions to ask your doctor
- What are the main findings in my report?
- Do the results explain my symptoms?
- Is further testing needed?
- What treatment or follow-up do you recommend?
- When should I return for review?
Need information about sleep testing?
Learn about testing options through Srivari Healthcare: sleep-study service in Chennai. Do not start, stop or change treatment based only on your own interpretation of a report.
Sleep study and CPAP therapy in Chennai
Home sleep test with Scala / SAMOA, Sonata polysomnography in our sleep lab — and the CPAP or BiPAP therapy that follows.
After the report
If your report points to sleep apnea, your doctor may discuss positive airway pressure therapy. You can compare CPAP machines, read our guide to the best CPAP machine, or ask about BiPAP rental.
For hospitals, clinics and sleep labs
Related reading
Think you may have sleep apnea?
A sleep study is how doctors confirm sleep apnea. Read how a sleep apnea test in Chennai works, or how you can do a home sleep study in your own bed. Your doctor decides which test suits you.
This article is educational and does not replace individual medical advice. Please speak to a qualified doctor about your own symptoms and results.
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