Which Test Is Used for Sleep Apnea?

The most basic evaluation method for people suspected of having sleep apnea is a sleep test. Sleep apnea is a sleep disorder that may occur when a person’s breathing repeatedly stops, slows down, or becomes shallow during sleep. This condition should not be considered only as snoring or restlessness during sleep; because it can lead to a decrease in oxygen levels throughout the night, frequent interruption of sleep, and a significant feeling of fatigue during the day.

The tests used for sleep apnea help evaluate the person’s breathing pattern, oxygen level, heart rate, airflow, and in some cases sleep stages throughout the night. Therefore, listening only to the complaints is not enough for diagnosis. Especially if loud snoring, breathing pauses during sleep, morning headache, excessive daytime sleepiness, difficulty concentrating, and frequent nighttime awakenings are present, a clearer evaluation should be made with a sleep test.

Basic Tests Used in Sleep Apnea Diagnosis

The two most commonly used methods in sleep apnea evaluation are polysomnography and home sleep testing. Which test is appropriate is determined according to the person’s complaints, accompanying diseases, the level of suspicion for a sleep disorder, and the doctor’s clinical evaluation.

While polysomnography provides a more comprehensive sleep examination, home sleep testing may be a more practical alternative in suitable people with suspected obstructive sleep apnea. The purpose of both methods is to measure how breathing is affected during sleep and to help medical evaluation regarding the presence or severity of sleep apnea.

What Is a Polysomnography Test?

Polysomnography is a detailed sleep test performed in a sleep laboratory. During this test, the person is monitored throughout the night and many functions of the body during sleep are recorded. Respiratory movements, airflow through the nose and mouth, blood oxygen level, heart rhythm, brain waves, eye movements, muscle activity, and in some cases leg movements are evaluated.

Polysomnography is an important test especially in cases where other sleep disorders besides sleep apnea are also suspected. For example, it can provide more comprehensive data in distinguishing different conditions such as restless legs syndrome, periodic leg movements, narcolepsy, or complex sleep disorders. Therefore, not only breathing pauses but also the overall quality and structure of sleep can be examined.

What Is a Home Sleep Test?

A home sleep test is a test that allows some basic breathing and oxygen data to be recorded while the person sleeps in their own home. It can generally be preferred in adults who are suspected of having obstructive sleep apnea and in whom no additional complex sleep disease is considered. It allows evaluation in the person’s familiar sleep environment without the need to go to a sleep laboratory.

The devices used in this test generally measure airflow through the nose, chest and abdominal breathing movements, oxygen saturation, pulse information, and in some cases sleep position. A home sleep test may not be as comprehensive as polysomnography; however, in suitable patients, it can provide valuable information for assessing sleep apnea risk and monitoring respiratory events.

Which Data Are Measured in a Sleep Apnea Test?

Sleep apnea tests help understand how regularly breathing continues throughout the night. These data are helpful in showing not only whether the person snores, but also whether they actually experience breathing pauses or decreased breathing during sleep.

The main measurements evaluated in the test result include apnea, hypopnea, oxygen drops, and the frequency of respiratory events. These findings are evaluated by the doctor together with the person’s complaints, age, weight, accompanying diseases, and general health status.

Number of Apneas and Hypopneas

Apnea is the stopping of breathing for a certain period during sleep. Hypopnea means that breathing does not stop completely but decreases significantly. How many times these events occur throughout the night is an important indicator in sleep apnea evaluation.

This number is not interpreted alone. The duration of breathing pauses, their effect on oxygen level, how much they interrupt the person’s sleep, and their relationship with daytime complaints are evaluated together. Therefore, the test result must be interpreted by a physician.

Oxygen Level

In sleep apnea, breathing pauses or reductions may cause the oxygen level in the blood to drop. Repeated oxygen drops throughout the night may place additional strain on the cardiovascular system and may be associated with symptoms such as morning fatigue, headache, or daytime sleepiness.

In home sleep tests, oxygen saturation is usually monitored with the help of a sensor attached to the finger. This measurement provides important information about whether the body receives enough oxygen during sleep.

Airflow and Breathing Movements

In a sleep apnea test, the airflow passing through the nose and the breathing movements in the chest-abdominal area may also be monitored. These data help evaluate whether the breathing pause may be related to an obstruction in the airway or to a different problem in breathing signals.

In obstructive sleep apnea, the person tries to breathe; however, airflow is not sufficient due to narrowing or obstruction in the upper airway. Therefore, evaluating breathing movements and airflow together is important from a diagnostic perspective.

Who May Be Suitable for a Home Sleep Test?

Home sleep testing may be considered especially in people with signs of obstructive sleep apnea such as snoring, breathing pauses during sleep, daytime sleepiness, morning headache, and waking up tired. Difficulty going to a sleep laboratory, thinking that one will sleep more comfortably at home, or needing a practical preliminary evaluation may also make the home testing option stand out.

However, home sleep testing may not be suitable for everyone. Polysomnography may be preferred in people with serious heart, lung, or neurological diseases, when different sleep disorders are suspected, or when a more detailed examination is required. Therefore, test selection should be made by taking personal symptoms and medical history into account.

When May a Sleep Apnea Test Be Necessary?

A sleep apnea test should come into consideration especially when symptoms begin to affect the person’s quality of daily life. Complaints such as loud snoring at night, noticed breathing pauses, waking up with a choking sensation, morning headache, dry mouth, excessive daytime sleepiness, distractibility, and irritability should be evaluated in terms of sleep apnea.

When these symptoms are ignored for a long time, sleep quality may deteriorate and the person may not feel rested even if they sleep for a sufficient amount of time. In addition, sleep apnea may be associated with risks such as hypertension, rhythm disorders, metabolic problems, and loss of attention at work or in traffic, so early evaluation is important.

How Is the Test Result Evaluated?

Sleep test results are generally evaluated based on the frequency of respiratory events, oxygen drops, and irregularities experienced during sleep. One of the most commonly used indicators is the apnea-hypopnea index. This value shows the number of apneas and hypopneas per hour during sleep.

However, the test result should not be handled only as a numerical value. The person’s symptoms, daytime fatigue, accompanying health problems, and the technical adequacy of the test are evaluated together. Therefore, expert opinion is needed to interpret the sleep test result and determine the next steps.

Evaluation Should Not Be Delayed When Sleep Apnea Is Suspected

Although sleep apnea is perceived by many people only as a snoring problem, it is a sleep disorder that requires more comprehensive evaluation. Especially if breathing pauses during sleep are noticed, the person wakes up tired in the morning, or experiences involuntary daytime sleepiness, a sleep test should be considered.

With the right testing method, breathing problems that occur during sleep can be understood more clearly. Thus, problems affecting sleep quality can be identified and a more informed follow-up process can be planned in terms of the person’s general health risks.

Manage Your Home Sleep Test Process More Easily With Happ Health

When sleep apnea is suspected, not delaying the testing process is important for both sleep quality and general health. Happ Health, with its digital health platform approach, offers a solution that makes access to the Home Sleep Test process easier. This allows suitable people to plan the necessary steps for sleep evaluation more practically in the home environment.

Through Happ Health, you can get information about the Home Sleep Test service, manage the process through digital channels, and, if needed, follow your next steps more consciously with the guidance of healthcare professionals. If you have symptoms of sleep apnea, you can make a reliable and accessible start to evaluate your sleep health.