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Sleep Study (PSG)

POLY (multi channel)   SOMNO (during sleep)   GRAM (recording)

A Polysomnogram (PSG), is a multi-channel recording during sleep. This test is used to determine if any disorders of sleep are present. The test records data from various electrodes and sensors that have been applied to the Patient measuring:

  • Brain waves (EEG)
  • Muscle activity (EMG)
  • Eye movement (EOG)
  • Breathing (Effort and Flow)
  • Oxygen (pulse oximetry)
  • Heart rate and rhythm (EKG)

The testing is non-invasive , painless and usually lasts approximately 6-7 hours. Even with the various electrodes and sensors in place, you are able to turn side to side, or on your back to get comfortable. If you need to use the restroom it is not a problem. We can easily unhook you from the recording device and you are able to go into your own private restroom. Most people sleep reasonably well, despite being "wired up". We only need a sample of your sleep for the test to be of value. You will receive further instructions once your test has been scheduled. We will make every attempt to make your stay with us as comfortable as possible.

Pressure Titration Study

Following a Sleep Study (PSG), if a diagnosis of Obstructive Sleep Apnea (OSA) has been determined, you may be asked to return for a second night study with positive airway pressure. CPAP (Continuous positive airway pressure) or (BI-LEVEL pressure), sometimes called BI-PAP, is the most effective and widely used methods of treating sleep apnea. CPAP is the delivery of lightly pressurized air into the back of ones airway, that prevents it from narrowing or collapsing, resulting in the cessation of snoring and apneas. This air is delivered through a nasal mask of the patient's choice. There are many styles to choose from, including nasal, nasal pillows and even full face options. It should be noted that this is not oxygen, it is room air, and the machine does not breathe for you, you are still in control of your breathing. Most patients are very responsive to this treatment option and get use to it quickly. This procedure requires the same monitoring process with electrodes and sensors as utilitzed with the diagnostic PSG.

Multiple Sleep Latency Test (MSLT)

Patients who have symptoms of excessive daytime sleepiness or who fall asleep at inappropriate times may be ordered a MSLT. A MSLT follows the morning after an overnight polysomnogram. This test will measure how long it takes a patient to fall asleep on each of 4 to 5 periods, which take place every two hours throughout the day. This should not be considered a sleep day, patients are only permitted to sleep for 15 minutes with each nap period, then the patient will remain awake for the next two hours until it is time for the next scheduled nap.
Feel free to bring a book or lap top to use between naps. Television and VCR/DVD are also available. A continental breakfast and lunch will be provided. Caffeine will be off limits for the day. Please notify us of any special needs you may have. Further information and instructions will be given at the time your testing is scheduled. In most cases patients can expect to have testing completed by 5:00 PM.

Maintenance of Wakefulness Test (MWT)

The maintenance of wakefulness test (MWT) measures the ability of a person to resist sleep when instructed to remain awake for a specified period of time, 20-40 minutes. It is used to certify truck drivers and pilots, documenting their ability to remain awake. The recordings will take place with the patient in an upright position, in a dimly lit, quiet atmosphere. It may be done following an overnight PSG but it is not always required. The study takes place during the daytime, beginning 2 hours after morning awakening. There will be a series of 4 recordings, each 2 hours apart over the course of the day. Like the MSLT, the patient will be required to remain awake between recordings. Feel free to bring a book or lap top to use between recordings. Television, VCR/DVD will be available. A continental breakfast if desired, and lunch will be provided. Caffeine will be off limits for the day. Please notify us of any special needs you may have. Further information and instructions will be given at the time testing is scheduled. In most cases patients can expect to have testing completed by 5:00 P.M.

VPAP ADAPT SV (Variable positive airway pressure adaptive servo-ventilation)
BIPAP AUTO SV (BI [2 different pressures] Auto Servo Ventilation)

These devices are brand specific, and are used to treat complicated breathing patterns such as complex sleep apnea, Cheyne Stokes respiration and central sleep apnea. These devices provide pressure support to the patient on a breath by breath basis and have been shown to be an effective therapy for those patients who did not respond well to traditional CPAP or BI-LEVEL therapy.

After my Sleep Study

Following your sleep study, a board certified sleep specialist will review your history and your recorded data to determine a diagnosis to give recommendations and treatment options. Your primary care physician may want to discuss your results with you, or they may ask that you follow up with the sleep specialist to discuss your results, initiate treatment and continue with your follow up care.