What is it?

• an all-night sleep study
• monitors various physical functions during sleep
  • electrical activity of your heart
  • brian wave patterns
  • eye movement
  • muscle tone
  • body movements
  • breathing

How long does it take?

• all night

Why is a PSG performed?

• helps evaluate the cause of excessive daytime sleepiness, insominia, or unusual spells occurring during sleep
• if other sleep orders are diagnosed
  • sleep apnea (disturbances of breathing during sleep)
  • narcolepsy (sudden and uncontrollable onsets of sleep)

Does it hurt?

• no. you will experience no pain or discomfort

Where is it conducted

• Neurology Sleep Disorder Center 2nd floor Carver Pavilion

How many PSGs are conducted each year?

• over 1000

What should you do to prepare for the test?

• come in for the test about two hours before normal bedtime to allow for preparation
• bring all medications you are currently taking with you when you come for the test. You may continue taking all medications unless your doctor gives other instructions
• bring suitable nightware such as pajamas and a bathrobe
• eat supper as usual the night of the test
• wash your hair before coming for the test. Do not apply sprays, oils, or dressings of any kind

How is it performed?

• a technologist measures your head so that all attachments fit comfortably
• soft, red pencil marks are made on your scalp where electrodes will be placed
• several electrodes are places on your chest and legs
• electrodes are glued to your scalp and skin with an air blower
• special jelly is applied to each electrode. Nothing goes into or under your skin.
• each electrode connection is checked with a meter to insure that it is working properly
• an elastic belt is placed around your chest to measure your breathing
• heat-sensitive wires are placed by your nose and mouth to monitor air flow during breathing
• a probe is taped to your finger to measure the oxygen saturation of your blood

During the test

• you will be in a room by yourself and asked to sleep on a bed
• a technologist monitors the recordings in another room
• an intercom is available so that you may call the technologist at any time
• don't worry if you cannot sleep during the test. The information gained will still be useful.

Following the test

• after the testing period, the technologist will awaken you and disconnect all wires
• the electrodes are removed with acetone, which dissolves the glue and leaves your hair and skin intact
• you may wash your hair when you return to your hospital room or home, unless your doctor gives you other instructions

Learning results

• you will learn the test results from the doctor either on the day of your visit, or the results of your study will be sent to your referring doctor.