Sleep Apnea Chicago | Sleep Study Q & A | Chicago ENT

Sleep Study Questions and Answers

Common questions and answers to prepare you for your sleep study

What is a sleep study and why do i need it?

The all-night Sleep Study (Polysomnography test from 9:00 p.m. to 5:30 am the next day) is a non-invasive recording of multiple body functions during sleep. The Polysomnography will record your brain wave patterns (EEG), muscle movements and movements of your eyes, the amount of oxygen, nose, mouth, and abdominal breathing, your leg movements and your heart rate in sleep. These functions are analyzed separately and in their interactions.

An overnight Sleep Study is a painless and very important test to diagnose disorders related to sleep, such as stop breathing in sleep, snoring, awakenings or difficulties falling back to sleep, heart irregularities, muscle pain, bad dreams, unusual behavior in your sleep and many others (there are 83 sleep disorders identified). A Sleep Study test is crucial in helping to develop the right treatment.

What is a CPAP Titration study?

For patients with a confirmed diagnosis of Obstructive Sleep Apnea (OSA), a CPAP Titration sleep study will be performed to calibrate Continuous Positive Airway Pressure (CPAP). The CPAP device is a machine with a humidifier, which produces air that flows through a fitted mask into the nose or mouth with a specified pressure. Titration means careful and precise measurement of the necessary pressure. Currently, CPAP is the most common way to treat and manage sleep-related breathing disorders.

Why am I having a Multiple Sleep Latency Test (MSLT)?

For people who have excessive daytime sleepiness and fatigue, a Multiple Sleep Latency Test (MSLT) is a necessity. This test objectively measures the level of sleepiness and is performed in the morning, always following the Sleep Study. The MSLT consists of four to five 20 minute naps followed by periods of alertness.

Will someone watch me sleep?

No one will watch you sleep. Cameras and sensors are present to detect your position and snoring.

How do I confirm or cancel my appointment?

One to two days before your test, our staff will call you to confirm you appointment and ask if you have any additional questions. NOTE: We ask that you contact our office at least 24 hours prior to the test if you need to CANCEL or reschedule.

What about my regular medications?

Take all the medications that you usually take at the prescribed times. Bring any nighttime medications or medication for the next morning with you. If you are unsure please consult with your doctor.

Will you give me medication if I can't sleep?

No sleeping pills will be given to you during your sleep study, however If necessary, your doctor can prescribe you something or recommend something over the counter to take.

What if I need special accommodations?

Inform the person scheduling your sleep study, if you have any special needs, medical conditions or allergies, diabetes, asthma, etc.

What if I have a preferred time to sleep?

Inform the scheduling staff about your preferable bedtime and wake up time and we can try to accommodate outside of our normal scheduling times.

What to bring and what not to bring with you for your sleep study

  • Insurance card(s) and ID
  • Bring your pajamas/nightgown, toothbrush, toothpaste, slippers and socks.
  • Please, NO hair spray, gel, conditioner or lotion prior to the test.
  • Ladies, please NO heavy make-up, nail polish or artificial nails.
  • Gentlemen, please, try to shave your face before the test. It will be easier to attach the electrodes and provide more accurate recordings.
Will I be able to adjust my sleep positions with the sensors connected?

Most patients get adjusted to the sensors and wires easily. You will be able to move around in sleep and adjust your sleeping position. Please note that you will be asked to spend some time on your back. In the morning all electrodes will be removed. You will have an opportunity to comment on the technician and other issues of the study by completing the Morning Report form.

When will my referring doctor get the results?

Your doctor will receive the results of the Sleep Study, interpretations and recommendations, within 5-7 business days by fax. We encourage you to contact your Doctor for a follow-up appointment.

Will my insurance cover the sleep study?

Sleep studies are covered under most medical insurance plans, although deductibles and percentages of coverage vary. Details regarding coverage should be directed to your insurance company. We will verify insurance benefits and coverage prior to your sleep study. Please feel free to call our office at 773.262.4110 to answer any remaining questions or concerns you may have.


Chicago ENT has four convenient locations throughout the greater Chicago area. For the exact location and/or directions, simply click on the map next to your desired location. To book an appointment, call 773-296-5500 to speak to a scheduler or conveniently online 24/7.

Advanced Center for Specialty Care
3000 N. Halsted Street, Suite #400
Chicago, IL  60657

Phone: 773-296-5500

Office hours:
Monday 8:30 am – 5:00 pm
Tuesday 8:30 am – 6:30 pm
Wednesday 8:30 am – 5:00 pm
Thursday 8:30 am – 6:30 pm
Friday 8:30 am – 5:00 pm
Saturday 9:00 am – 12:00 pm

Allergy Shot Clinic hours:
Monday 8:30 am – 4:00 pm
Wednesday 8:30 am –4:00 pm
Friday 8:30 am – 3:00 pm
Saturday 9:00 am – 11:30 am

St. Mary’s Hospital Professional Building
2222 W. Division Street, Suite #250
Chicago, IL  60622

Phone: 773-296-5500

8930 Gross Point Road, Suite #700
Skokie, IL 60077

Phone: 773-296-5500

Swedish Covenant Hospital
5140 N. California Avenue, Suite #600
Chicago, IL  60625

Phone: 773-296-5500

2522 W. Peterson Avenue
Chicago, IL 60659

Phone: 773-262-4110