Understanding Sleep Apnea Testing

Sleep Apnea Testing

Sleep apnea testing records breathing and other body signals during sleep. Testing may be completed at home using portable equipment or overnight in a sleep laboratory, depending on the clinical situation and the information that needs to be collected.

Compare Testing Options

Sleep Apnea Overview

✓ Home sleep apnea testing

✓ In-lab sleep studies

✓ What happens after testing

Testing at a Glance

Two Main Testing Environments

Home Sleep Apnea Testing

Portable monitoring completed in the usual sleeping environment.

In-Lab Polysomnography

More extensive overnight monitoring completed in a sleep laboratory.

Professional Interpretation

Recorded information must be reviewed in the appropriate clinical context.

Confirming Sleep Apnea

Symptoms Alone Cannot Diagnose Sleep Apnea

Snoring, breathing pauses, gasping, unrefreshing sleep and daytime sleepiness may raise concern about sleep apnea, but symptoms and risk factors cannot determine whether the condition is present.

Sleep testing records physical information while a person sleeps. The recorded findings are then reviewed alongside the wider clinical situation before conclusions are reached.

Sleep Testing Can Help Determine

Whether breathing events were recorded
How frequently events occurred
Whether oxygen levels changed
Whether events varied with sleeping position
Whether additional assessment may be needed

Testing equipment collects information. Professional interpretation determines what the recorded findings mean.

What to Expect

How Sleep Apnea Testing Works

The exact pathway varies, but sleep testing generally moves from selecting an appropriate study to recording and interpreting sleep-related information.

Testing Is Considered

Symptoms, sleep concerns and relevant clinical information are reviewed.

A Test Is Selected

Home or in-lab testing may be selected according to the clinical situation.

Sleep Data Are Recorded

The assigned equipment records the required signals during the study.

Results Are Interpreted

Recording quality and findings are professionally reviewed before next steps are determined.

Testing Options

Home Sleep Apnea Testing vs. In-Lab Sleep Studies

Both methods record sleep-related information, but they differ in setting, equipment and the range of signals collected.

Home Sleep Apnea Test (HSAT)

Completed in the usual sleeping environment
Uses portable monitoring equipment
Records a focused set of breathing-related signals
Sensors are generally applied using supplied instructions
Primarily used in the evaluation of suspected obstructive sleep apnea in appropriate patients
Requires technically usable data and professional interpretation

In-Lab Polysomnography

Completed overnight in a sleep laboratory
Attended by trained staff
Uses more extensive monitoring equipment
Can record sleep stages and several body systems
May be used when broader or more detailed evaluation is required
May be considered after a negative, inconclusive or technically inadequate home test

Neither testing method is universally better. The appropriate test depends on the clinical situation and the information that needs to be collected.

Selecting the Appropriate Test

The Appropriate Test Depends on the Clinical Situation

Test selection may consider symptoms, health history, other possible sleep disorders, previous testing and the ability to use portable equipment reliably.

HSAT May Be Considered When

The patient is an adult
Obstructive sleep apnea is the primary sleep-related concern
Portable testing is considered clinically appropriate
The equipment can be applied and used reliably
More extensive monitoring is not required
The applicable testing or referral pathway supports home testing

In-Lab Testing May Be Preferred When

The sleep concern may involve another disorder
More extensive monitoring is required
Medical complexity affects the testing approach
Portable equipment cannot be used reliably
A previous home test was negative, inconclusive or technically inadequate
The healthcare professional determines laboratory testing is more appropriate

These are general examples rather than an eligibility checklist. The appropriate testing pathway should be determined from the broader clinical situation.

Understanding the Equipment

What Sleep Tests May Record

The exact signals collected depend on the equipment and testing protocol.

Airflow

Measures airflow through the nose or mouth.

Breathing Effort

Belts or other sensors may record chest or abdominal movement.

Oxygen Saturation

A sensor may estimate oxygen saturation during the recording.

Heart Rate

Some studies record pulse or more detailed cardiac information.

Position & Movement

Some systems record sleeping position, movement or snoring.

Sleep Stages

In-lab polysomnography may use brain, eye and muscle sensors to determine sleep stages.

Portable testing generally records a focused set of breathing-related signals, while in-lab polysomnography records a broader range of sleep and body signals.

Home Sleep Apnea Testing

Home Sleep Apnea Testing (HSAT)

A home sleep apnea test uses portable equipment to record a focused set of breathing-related signals while a person sleeps in their usual environment. It is intended primarily for evaluating suspected obstructive sleep apnea when home testing is considered appropriate.

How Home Sleep Apnea Testing Works With MedPro

01 Contact or Referral

An inquiry, referral or other required documentation is received through the applicable process.

02 Eligibility and Pathway Are Reviewed

The testing pathway and any required information are confirmed.

03 Equipment Is Supplied

The portable testing kit is provided according to the local clinic or regional process.

04 Instructions Are Reviewed

Instructions explain how to apply the equipment, begin the recording and respond to common equipment issues.

05 Testing Is Completed Overnight

The equipment records the required signals during the instructed recording period.

06 Equipment and Data Are Returned

The kit is returned or the recording is submitted for quality review and interpretation.

A Home Test May Include

A portable recording device
A nasal airflow sensor
A breathing-effort sensor or belt
A finger oxygen and pulse sensor
Position, movement or snoring monitoring depending on the system

The exact sensors and signals depend on the testing equipment and protocol supplied.

Testing availability, referral requirements, equipment pickup or delivery, and return procedures may vary by province and MedPro location.

Before the Test

Preparing for Sleep Testing

Preparation varies between studies. The instructions supplied for the assigned test should always take priority over general website information.

Confirm the Testing Details

Confirm the required study date or test night
Review arrival, pickup, delivery or return instructions
Complete any required forms or sleep diary

Medication & Routine Guidance

Provide medication information when requested
Follow directions regarding caffeine, alcohol, naps or sleep aids
Do not stop prescribed medication unless instructed

Prepare for the Sensors

Review the supplied preparation instructions
Follow skin or sensor-preparation directions
Keep relevant contact information available

Instructions provided with the assigned study or test kit override general guidance on this webpage.

In-Lab Polysomnography

More Extensive Monitoring Provides a Detailed View of Sleep

An in-lab polysomnogram is an attended overnight sleep study. Sensors may be applied to the head and body to record sleep stages, breathing, oxygen and other body signals.

A technologist monitors recording quality from a separate area. In-lab testing may be used when broader monitoring is required or when another sleep disorder may need evaluation.

What an Overnight Lab Study May Involve

Arrival at the sleep laboratory
Review of forms and study instructions
Sensor placement by trained staff
Testing of sensor signals
Overnight recording in a sleep room
Monitoring from a separate control area
Sensor removal after the study

After Sleep Testing

Recorded Information Must Be Reviewed Before Conclusions Are Reached

The recorded signals are checked and interpreted before the appropriate next step is determined.

Recording Quality Is Checked

The study is reviewed to determine whether enough usable information was collected.

Events Are Assessed

Breathing events, oxygen changes and other recorded signals are assessed.

Results Are Interpreted

The report is considered alongside the relevant clinical context.

Next Steps Are Determined

The pathway may include monitoring, further testing or discussion of treatment.

Reading a Sleep Test Report

Common Terms You May See After Testing

These definitions are introductory and do not replace professional interpretation of an individual sleep study.

Apnea

A recorded interruption or near-complete reduction in airflow that meets applicable scoring criteria.

Hypopnea

A partial reduction in airflow associated with other qualifying changes.

AHI

The apnea-hypopnea index generally describes qualifying breathing events per hour of sleep.

REI

The respiratory event index commonly summarizes qualifying events using the monitored or recording period in a home test.

Oxygen Saturation

An estimate of the oxygen level recorded during testing.

Oxygen Desaturation

A decrease in the recorded oxygen saturation level.

One report number should not be interpreted in isolation. The complete study and relevant clinical information provide the broader context.

When More Information Is Needed

One Test Does Not Always Complete the Evaluation

A sleep test may not provide a clear answer when sensors disconnect, too little usable information is recorded or the study is technically inadequate.

Additional testing may also be considered when a result does not match ongoing concerns or another sleep disorder remains possible.

Possible Next Steps May Include

Reviewing the setup or recording process
Repeating home sleep apnea testing
Completing an in-lab sleep study
Evaluating another sleep-related concern
Continuing with another recommended assessment

A negative or inconclusive home recording should be reviewed in the appropriate clinical context.

MedPro Home Testing

Home Sleep Apnea Testing at MedPro

Home sleep apnea testing availability, referral requirements, equipment arrangements and return procedures may differ between regions. A MedPro location can provide information about the home-testing process available in your area.

Find a MedPro Location

Regional Processes Can Differ

Testing availability
Referral or requisition requirements
Equipment pickup or delivery
Equipment return procedures
Results and follow-up pathways

Common Testing Questions

Sleep Apnea Testing FAQ

Answers to common questions about home sleep apnea tests and in-lab sleep studies.

What is a home sleep apnea test?

A home sleep apnea test uses portable equipment to record a focused set of breathing-related signals while a person sleeps at home. It is used primarily in the evaluation of suspected obstructive sleep apnea when home testing is considered appropriate.

Is a home sleep apnea test the same as an in-lab sleep study?

No. A home test uses portable equipment and records a focused set of signals, while in-lab polysomnography uses more extensive monitoring and may record sleep stages and additional body signals.

Who determines whether home or in-lab testing is appropriate?

The appropriate healthcare professional considers the sleep concerns, health history, other possible sleep disorders, previous testing and the applicable clinical pathway.

Does a home sleep apnea test record whether someone is actually asleep?

Many common home testing systems do not measure sleep stages in the same way as full polysomnography. The exact capabilities depend on the equipment supplied.

What happens if a home-test sensor disconnects?

Follow the device-specific instructions provided with the equipment. The recording can then be reviewed to determine whether enough usable information remains or whether additional testing is required.

What if someone does not sleep normally during the test?

Sleeping differently from usual does not automatically make a recording unusable. The recorded data are reviewed to determine whether enough useful information was collected.

What happens if a home sleep apnea test is negative or inconclusive?

Depending on the professional review and wider situation, the next step may include repeating the home test, completing an in-lab study or evaluating another sleep-related concern.

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