Sleep Laboratory
You can review our page explaining the procedures performed at the Sleep Laboratory of Private Medicabil Hospital in Bursa and the details of these procedures. If you think you have similar symptoms, you can make an appointment either through our live support service or by calling our call center at 444 8 112.
What Is a Sleep Disorder?
We spend approximately one-third of our lives asleep. Sleep is a biological process that every person needs to experience each day to rest and restore both mental and physical health. The primary purpose of sleep is to allow the body and brain to recover after the demands of daily life. Starting the day feeling refreshed and rested is an indication of healthy sleep.
If the body does not receive sufficient rest during sleep and a person starts the day feeling tired, a sleep disorder should be considered. Sleep disorders are conditions that cause various problems during the day due to insufficient sleep and/or physiological events occurring during sleep.
Some sleep disorders include:
Difficulty falling asleep
Difficulty maintaining sleep
Excessive sleepiness
Sleep-related breathing disorders
Periodic limb movement disorder during sleep
What Is Sleep Apnea?
Sleep apnea (Obstructive Sleep Apnea Syndrome – OSAS) accounts for a large proportion of sleep-related breathing disorders. Symptoms of sleep apnea include:
Snoring
Pauses in breathing during sleep
Excessive daytime sleepiness due to poor-quality sleep at night
Waking up tired in the morning
Increased risk of workplace and traffic accidents
Excessive sweating
Sleep apnea is a condition that requires proper diagnosis and treatment. Because breathing may stop briefly and repeatedly throughout the night, vital organs—particularly the brain and heart—may be deprived of sufficient oxygen. In the long term, untreated sleep apnea can contribute to undesirable health conditions that may become more difficult to manage.
What Are Sleep Disorder Tests? How Are They Performed?
Some sleep disorders, such as sleep apnea, require overnight monitoring in a sleep laboratory. During an overnight sleep study (polysomnogram/PSG), electrodes are placed on the patient to record brain activity, eye movements, and muscle activity. Additional sensors are placed around the nose, chest, and abdomen to monitor breathing patterns.
On the night of the study, you will be asked to arrive at the sleep laboratory between 6:30 p.m. and 8:30 p.m. to prepare for the test. You will be allowed to sleep in a private bedroom at your usual bedtime. Unless another test has been scheduled, you may leave the laboratory between 6:00 a.m. and 8:00 a.m.
For individuals experiencing excessive daytime sleepiness who are suspected of having narcolepsy, a Multiple Sleep Latency Test (MSLT) is generally performed on the day following the overnight polysomnogram. During the MSLT, the electrical activity of the brain, eyes, and chin muscles is recorded while the patient is given five opportunities to take naps throughout the day at two-hour intervals. The time required to fall asleep during each nap is measured. The test provides an objective assessment of daytime sleepiness.
Depending on the patient’s clinical history, additional parameters may be recorded during the overnight study. Patients who exhibit unusual behaviors or excessive movements during sleep may undergo more comprehensive monitoring of muscle and brain activity. Esophageal pressure monitoring, which involves placing a sensor through the nose into the esophagus, may be performed to evaluate abnormal breathing patterns that could be missed during a routine polysomnogram.
As part of the sleep evaluation, patients may be asked to complete a sleep disorders questionnaire and keep a sleep diary for at least one week before their appointment.
Overnight Sleep Test: What Is a Polysomnogram (PSG)?
Please read the following preparation instructions carefully:
Avoid napping on the day of the study.
Unless otherwise instructed by your physician, avoid alcohol, caffeine, sedatives, and stimulants for 24 hours before the study.
Eat your normal evening meal before arriving at the sleep disorders center. Breakfast will be provided for patients who are staying for daytime testing. Please inform the center in advance of any special dietary requirements.
Make sure your hair is free of oils, hair spray, and other hair products on the day of the study.
Bring your regularly used medications and plan to take them as usual unless your physician instructs you otherwise.
Bring comfortable sleepwear (silk should be avoided). Shower facilities are available.
Bring your sleep questionnaire and sleep diary, along with a list of your regular medications, including dosage and dosing schedule.
If you use positive airway pressure therapy (CPAP/Bilevel), bring your mask and headgear.
If you are under 18 years of age, a parent or legal guardian must remain with you at the sleep disorders center throughout the test.
Please inform us if you have a disability or condition requiring special assistance. You may need to have a caregiver with you during the test.
Daytime Sleep Tests: Multiple Sleep Latency Test (MSLT) / Maintenance of Wakefulness Test (MWT)
Please read the following preparation instructions carefully:
Eat and drink normally on the night before and the morning of the study.
If you stayed overnight for a polysomnogram, breakfast and lunch will be provided. If you are scheduled only for daytime testing, please eat your normal meal the night before and have your usual breakfast before your appointment. If you have any special dietary requirements, please inform the center in advance.
Wear comfortable clothing.
Make sure your hair is free of oils, hair spray, and other hair products on the day of the study.
Bring your regularly used medications and plan to take them as usual unless your physician instructs you otherwise.
Bring reading materials or other activities to occupy yourself during your free time.
Avoid napping, smoking, and strenuous physical activity on the day of the study.
If you are under 18 years of age, a parent or legal guardian must remain with you at the sleep disorders center throughout the test.
Please inform us if you have a disability or condition requiring special assistance. You may need to have a caregiver with you during the test.
Avoid alcohol, sedatives, stimulants, and caffeinated beverages (such as coffee, tea, and cola) for 24 hours before the study.
If you are scheduled for an MSLT, please consult your physician regarding any changes to your medications. Your physician may advise you to avoid taking stimulant medications for two weeks before the test.
If you are scheduled for an MWT, please consult your physician regarding any changes to your medications. Your physician may advise you to continue taking stimulant medications on the day of the test.
What Is a Home Sleep Test?
A home sleep test is a diagnostic test that helps determine whether a person has obstructive sleep apnea, a potentially serious sleep disorder that occurs when breathing is repeatedly interrupted during sleep. The test is performed in the comfort of the patient’s home using a portable sleep monitoring device rather than in a sleep laboratory.
Who Is a Home Sleep Test Suitable For?
If a person suspects that they may have obstructive sleep apnea, they should consult their physician for an evaluation to determine whether they are at high risk of having moderate to severe obstructive sleep apnea.
Symptoms and risk factors are assessed using the following STOP-BANG criteria:
Do you snore loudly (louder than normal speech or loud enough to be heard through closed doors)?
Do you frequently feel tired, fatigued, or sleepy during the day?
Has anyone observed you stop breathing during sleep?
Do you have high blood pressure, or are you receiving treatment for high blood pressure?
Is your body mass index (BMI) greater than 35 kg/m²?
Are you over 50 years of age?
Is your neck circumference greater than 40 cm?
Are you male?
Having at least three positive answers to these questions indicates a high risk of obstructive sleep apnea. Depending on the individual’s score, the physician may recommend a home sleep test to determine whether the person actually has obstructive sleep apnea.