Home Sleep Testing (HST)
A simplified sleep study performed in your own home using a portable monitoring device to diagnose obstructive sleep apnea in appropriate candidates.
What is Home Sleep Testing (HST)?
Home Sleep Testing (HST), also called Home Sleep Apnea Testing (HSAT) or out-of-center sleep testing, allows patients to complete a sleep study in the comfort of their own bed. A portable device monitors key parameters—typically airflow, breathing effort, oxygen saturation, and heart rate—to detect obstructive sleep apnea. HST is appropriate for many patients with suspected moderate to severe OSA without significant comorbidities, offering convenience and lower cost compared to in-lab studies.
How It Works
You pick up a small portable device from your sleep clinic or have it mailed to you. At home, you follow instructions to apply sensors—typically a nasal cannula for airflow, a belt for breathing effort, and a finger probe for oxygen and heart rate. You wear the device during a typical night's sleep, then return it for data download and analysis by a sleep physician.
Who Is It For?
HST is appropriate for patients with a high pretest probability of moderate to severe obstructive sleep apnea without significant comorbidities. It's not recommended for patients with significant cardiopulmonary disease, potential central sleep apnea, neuromuscular disease, chronic opioid use, or when other sleep disorders are suspected. Your sleep physician will determine if HST is appropriate for you.
Benefits
Sleep in Your Own Bed
Testing at home eliminates the 'first-night effect' of sleeping in an unfamiliar environment, potentially providing more representative results.
Convenience
No need to take time off work or spend a night away from home. You complete the test on your own schedule.
Faster Access
HST devices are often available immediately, without the scheduling delays that can occur with in-lab studies.
Lower Cost
HST typically costs significantly less than in-lab polysomnography, reducing out-of-pocket expenses even with insurance.
Sufficient for Many Patients
For straightforward OSA diagnosis in appropriate candidates, HST provides adequate information to initiate treatment.
Side Effects & Considerations
Most side effects are minor and can often be resolved with simple adjustments.
Limited Data
HST doesn't measure brain waves (EEG), so it can't determine sleep stages, detect arousals, or diagnose many non-respiratory sleep disorders.
Potential for Technical Failure
Without a technologist present, sensor disconnection or data loss may require repeating the test.
May Underestimate Severity
Because HST estimates (rather than measures) total sleep time, it may underestimate OSA severity, particularly in milder cases.
Not Suitable for Everyone
Patients with certain conditions require in-lab testing for accurate diagnosis. Inappropriate use of HST may miss important diagnoses.
User-Dependent Setup
You must correctly apply sensors yourself. Poor application can affect data quality.
Variations & Types
Type III Devices
Monitor at least 4 channels including airflow, respiratory effort, and oxygen saturation. The most common type used for HST.
Type IV Devices
Simpler devices monitoring 1-2 channels, typically just oxygen saturation. Less comprehensive but used for initial screening.
WatchPAT
Wrist-worn device using peripheral arterial tone (PAT) technology to detect respiratory events. Easy to apply with good accuracy.
Disposable HST Devices
Single-use devices that are discarded after testing, eliminating cleaning and return shipping.
Tips for Success
Practice Before Test Night
Review instructions and practice applying sensors before your test night. This helps ensure correct application when it counts.
Choose a Typical Night
Test on a night when you expect normal sleep. Avoid alcohol, unusual schedules, or anything that might affect your typical sleep pattern.
Follow Instructions Carefully
Proper sensor placement is crucial for accurate data. Review written instructions and any instructional videos provided.
Sleep Your Usual Amount
Try to get a typical night's sleep duration. Very short sleep periods may provide insufficient data.
Note Any Issues
If sensors fall off or you have an unusual night, make notes to share with your provider when interpreting results.
Understand Potential Next Steps
If HST is negative or inconclusive but symptoms persist, in-lab PSG may be needed. A negative HST doesn't definitively rule out sleep apnea.
Additional Resources
Find Providers
Search our directory for sleep clinics that offer home sleep testing (hst).
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