How does a home sleep study work?

A home sleep study is a test you take in your own bed to check for sleep apnea. A medical provider orders it. You attach sensors at bedtime, sleep as usual and take them off in the morning. The device records your breathing and blood oxygen, and a physician reviews the data.^{1, 2}

By Wesper. Published November 2, 2026.

What is a home sleep study?

A home sleep study is a medical test that records how you breathe while you sleep at home. It gives your medical provider information to help diagnose sleep apnea, a condition in which your breathing pauses or becomes shallow during sleep.¹ You may also see it called a home sleep apnea test, or HSAT.² You will usually set up the testing equipment yourself, after a member of the sleep team shows you how.¹

An overnight study in a sleep lab is called polysomnography. It records your brain waves, heartbeats and breathing, and it also tracks eye, leg and arm movements and the oxygen in your blood.³ A home test focuses on your breathing and blood oxygen.¹

Who orders a home sleep study?

A medical provider orders a home sleep study. This can be a licensed physician or another health care professional who is licensed to practice medicine under state rules.² Before ordering the test, your provider should look at your medical history and examine you face to face, either in person or through telemedicine.²

Your provider may recommend a home test if it is highly likely that you have moderate to severe sleep apnea and you have no other significant medical conditions.¹ Home tests are meant for adults with signs and symptoms of sleep apnea, and they should not be used to screen people who have no symptoms.² Our guide to home sleep study costs and insurance explains what affects what you pay.

What happens the night of the test?

On the night of the test, you sleep at home while wearing sensors that collect information about your breathing.¹ To prepare, the American Academy of Sleep Medicine (AASM) suggests following your regular routine as much as possible, avoiding naps and cutting out alcohol and caffeine after lunch.¹ The AASM's patient guide describes the night in a few simple steps.¹

1. A member of the sleep team gives you instructions on how to use the device.
2. When you are ready to sleep, you attach the sensors to your body the way you were shown.
3. You may be asked to keep a sleep log or press a button on the device when you get into bed.
4. You go to sleep in your own bed and keep to your normal routine as much as you can.
5. When you wake up in the morning, you take the sensors off.

AASM guidelines describe a single home sleep test as recording over at least one night, so your test may cover more than one night.⁴ To learn how many nights may be needed, read our article on whether one night of home sleep testing is enough.

What does a home sleep test measure?

A home sleep test measures your breathing and the oxygen level in your blood. Some devices also measure your heart rate or other information about your body.¹

AASM guidelines list the minimum sensors a home test device should have to be considered technically adequate.⁴ One option uses a nasal pressure sensor to track airflow at your nose, sensors on your chest and belly to track the effort of breathing, and oximetry to measure blood oxygen. The other option uses peripheral arterial tone (PAT), a signal taken from your blood vessels, along with oximetry and actigraphy, which tracks movement.⁴

Home tests usually do not record brain waves. Because of this, they count breathing events per hour of recording time instead of per hour of sleep, and the result is called the respiratory event index, or REI.⁴ Our guide on how to read sleep study results explains what the numbers on your report mean.

What happens after the test?

After the test, the sleep team scores and interprets the information your device collected. This may take several days or weeks.¹

AASM guidance says the raw data from a home test must be reviewed and interpreted by a physician who is board-certified in sleep medicine or overseen by one.² Diagnosis and treatment decisions must not be based only on data that a computer scored automatically.² Only a medical provider can diagnose sleep apnea.²

Your provider will then go over the results with you and talk about next steps. Guidelines say testing for sleep apnea should be done along with a full sleep evaluation and follow-up care.⁴ If your result is negative or unclear, read what happens if your home sleep test is negative.

When is an in-lab study a better fit?

An in-lab sleep study may be a better fit if you have certain health conditions or if your doctor suspects a sleep problem other than sleep apnea.¹ The AASM's patient guide also says a home test may not fit if your risk of sleep apnea is low. The same is true if you have lung disease, neuromuscular disease or congestive heart failure, or if setting up the test at home would be physically hard for you.¹

AASM guidelines recommend a lab study rather than a home test for adults with significant heart or lung disease, or with possible weakness of the breathing muscles from a nerve or muscle condition.⁴ The same goes for people who have slow or shallow breathing (hypoventilation) while awake or are suspected of having it during sleep. It also applies to people who take opioid medicines long term and to people with a history of stroke or severe insomnia.⁴

A lab study also lets your care team start positive airway pressure (PAP) treatment during the night if needed, which cannot be done during a home test.⁴ Our article on home sleep tests and lab studies covers more about each option.

When a home test is the right fit, Wesper is one option your provider may use. Wesper develops FDA-cleared home sleep testing devices for adults, and multi-night testing comes standard with Wesper studies. Wesper Lab uses two wearable patches on the chest and abdomen to measure airflow, breathing effort, body position, blood oxygen, heart rate and sleep stages, with no nasal cannula (a small tube worn under the nose). Wesper Lite is a sleep test worn as a ring.

Frequently asked questions

Does a home sleep study hurt?

A home sleep study uses sensors that rest on the outside of your body, so there are no needles. You take the sensors off when you wake up in the morning.¹ If anything feels uncomfortable, ask your sleep team for help.

Can I sleep the way I normally do?

Yes. The AASM suggests following your regular routine as much as possible on test day, avoiding naps and cutting out alcohol and caffeine after lunch.¹

How long until I get results?

The sleep team needs time to score and interpret your data, which may take several days or weeks.¹ Ask your provider when to expect a follow-up visit.

Who reads my results?

A physician who is board-certified in sleep medicine, or who is overseen by one, must review and interpret the raw data from your home test.² Your provider then uses the results to make a diagnosis and plan next steps.

Can a home test rule out sleep apnea?

Not always. The AASM says a negative home sleep apnea test is not sophisticated enough to rule out sleep apnea, so if your symptoms still fit, your doctor may recommend an in-lab study.¹

Talk with your doctor or sleep provider if you have questions about whether a home sleep study is right for you. They can also tell you how to get ready for your test night.

This article is for general education and is not medical advice. Talk with a licensed medical provider about your symptoms and testing options.

Sources

1. American Academy of Sleep Medicine. Home Sleep Apnea Test. Sleep Education patient page, reviewed August 2020. sleepeducation.org
2. Rosen IM, Kirsch DB, Carden KA, et al. Clinical use of a home sleep apnea test: an updated American Academy of Sleep Medicine position statement. J Clin Sleep Med. 2018;14(12):2075-2077. aasm.org
3. American Academy of Sleep Medicine. Sleep Study. Sleep Education patient page, reviewed September 2020. sleepeducation.org
4. Kapur VK, Auckley DH, Chowdhuri S, Kuhlmann DC, Mehra R, Ramar K, Harrod CG. Clinical practice guideline for diagnostic testing for adult obstructive sleep apnea: an American Academy of Sleep Medicine clinical practice guideline. J Clin Sleep Med. 2017;13(3):479-504. aasm.org