Home Sleep Apnea Testing Explained

A home sleep apnea test (HSAT) lets you get checked for sleep apnea in your own bed. You wear a simple monitor instead of spending a night in a sleep lab. For many people, this is a convenient, accurate, and cost-effective option.

How does a home sleep test work?

A home sleep test uses a small portable device. It measures key signals while you sleep:

• Airflow — A nasal cannula (a thin tube under your nose) senses breathing through your nose
• Blood oxygen — A finger clip measures the oxygen level in your blood
• Breathing effort — Belts around your chest and/or belly track breathing movements
• Heart rate — Measured by the finger clip (pulse oximeter)
• Body position — Some devices track the position you sleep in

Who is a good candidate?

Home sleep testing works best for:

• Likely sleep apnea — Adults who are very likely to have moderate to severe obstructive sleep apnea (OSA)
• No serious illness — People without serious heart, lung, or nerve-and-muscle disease
• Able to set it up — People who can follow the steps to set up and use the device
• Prefer home — People who would rather test at home than visit a sleep lab

Who should get an in-lab study instead?

In-lab testing may still be needed for complex cases. Your sleep doctor will decide which test is right for you. An in-lab study may be better for:

• Heart or lung disease — People with congestive heart failure or severe COPD (a long-term lung disease)
• Central sleep apnea — People who may have central sleep apnea (the brain does not send the signal to breathe)
• Other sleep problems — People with signs of narcolepsy, parasomnias (unusual actions during sleep, like sleepwalking), or seizures
• Unclear results — When the home test does not give a clear answer

What should you expect?

1. Pickup — You get the device and instructions from your sleep clinic
2. Setup — Put on the sensors before bed (this usually takes 10-15 minutes)
3. Sleep — Sleep as normally as you can in your own bed
4. Return — Bring the device back by the return date your clinic gives you
5. Results — A sleep doctor reviews your data and contacts you with results

What are the pros and cons?

Benefits

• Your own bed — You sleep at home, so your sleep is more natural
• Convenience — No overnight stay at a sleep lab
• Cost — Usually costs less than testing in a lab
• Faster access — Shorter wait times in many cases

Limits

• No brain waves — Cannot measure brain waves or show sleep stages
• May underestimate — May show your sleep apnea as less severe than it really is
• Breathing only — Cannot diagnose sleep disorders that are not about breathing
• Setup matters — Results depend on putting the sensors on correctly

Is a home test as complete as an in-lab study?

No. An in-lab sleep study is called polysomnography. Unlike that test, home tests do not measure brain waves, so they cannot tell your stages of sleep. They also cannot find other sleep disorders. These include narcolepsy (a disorder that causes extreme daytime sleepiness) and periodic limb movements (repeated leg jerks during sleep).

Home tests are excellent screening tools for sleep apnea. But they measure fewer things than a full in-lab study (polysomnography). They are best for simple cases of suspected obstructive sleep apnea.