Sleep Study Lab

Comprehensive sleep study

Sleep is not a simple process. Many parts of the brain control your sleep in various stages. These stages of sleep include drowsiness, light sleep, deep sleep, and dream sleep. An overnight sleep study is the best way to analyze your sleep and all of its complexities.

This kind of study is called a polysomnogram. It measures your brain waves, heart beat, and breathing. It also records movements of your eyes and legs. It provides precise facts on what your body is doing at every moment of sleep. It is the most complete and scientific way to evaluate your sleep and discover any problems.

The polysomnogram is done at a sleep clinic and is used to evaluate sleep stages and diagnose sleep disorders such as insomnia, snoring and sleep apnea.

While you are sleeping, a polysomnographic technologist will record various important body functions and measurements from a nearby room.

A polysomnogram measures:

  • Brain Waves (EEG)
  • Heart Rate (EKG)
  • Eye Movement (EOG)
  • Muscle Movements (EMG)
  • Limb Movements (EMG)
  • Breathing (Nasal/Oral)
  • Breathing (Respiratory Effort)
  • Blood Oxygen Levels (Sp02)
  • Esophageal Pressure (PES)


To Prepare for Your Sleep Study

  • Don't take a nap on the day of the test.
  • Avoid caffeine (coffee, tea or cola) after breakfast.
  • Wash and dry your hair, and do not apply hair sprays, oils or gels.
  • Remove any nail polish from your index finger.
  • You must bring bed clothes (preferably two-piece pajamas) to wear during your sleep tests.
  • Bring something to read or to work on during non-sleep periods. You may bring a favorite video to view in your room prior to bedtime.
  • Bring personal toiletries (toothpaste, toothbrush, comb, brush, shampoo and hairdryer) and a change of clothes for the next day. The Sleep Clinic provides towels and bedding, and there are toilet and shower facilities available.
  • Bring all of your medications. Please bring a list of medications you have taken during the past month.


On the Day of Your Sleep Study

A technologist will greet you at your appointment time and show you to your bedroom. You will have time to change into nightclothes and get ready for bed as you do at home.

In preparation for the test, special sensors are placed on your scalp, forehead, chin, temples, chest, ankle and index finger. An airflow sensor is also placed under the nose. This will take approximately one hour.

You may listen to a music player with earphones, or read a book prior to lights out. You may go to sleep at your normal bedtime within the constraints of the sleep clinic protocol.