Diagnostic Testing

Polysomnogram (PSG)

A polysomnogram monitors a person’s sleep habits overnight in a sleep lab. The sleep technologist will position tiny painless sensors to different points on the patient’s body to record brain waves, respiratory flow, blood oxygen level, muscle activity, heart rhythm, body position, and other body functions during sleep. Your sleep stages and cycles can be identified, as well as when and why your sleep is disturbed.

During a sleep study, the technologist is in constant video and audio contact with the patient, providing a safe, supportive environment with minimal anxiety.

This is a baseline test for all possible sleep disorders. Treatments for sleep and breathing disorders such as sleep apnea, including the administration of positive airway pressure (PAP) and nocturnal oxygen, are frequently initiated during a PSG.

After your PSG, you’ll meet with the doctor to discuss your results and possible treatment options, if needed.

PAP Titration Study

A positive airway pressure (PAP) titration study is performed on someone who has already been diagnosed with sleep apnea or a sleep-related breathing disorder by a PSG and needs to test for an effective pressure setting for their CPAP or Bi-level.

In addition to all the sensors used in a PSG, the sleep technologist will help the patient to find a comfortable mask that best fits his or her face. When connected to a small flow generator, the mask allows air to gently blow into the back of the patient’s throat to maintain an open upper airway so that the patient can breathe normally. The airflow pressure is gradually increased during the night in order to find the right level of air pressure that will prevent the collapse of the patient’s upper airway. This will eliminate loud snoring and maintain an adequate blood oxygen level.

This test is repeated every few years (often five) or if there has been a change to their weight greater than 10 pounds, in either direction, to check the effectiveness of the pressure setting.

Home Sleep Study

A home sleep test involves the use of a portable monitoring device that is worn while sleeping. The patient would come to our clinic and be instructed on how to put on the device by our sleep technologist. After the night is over, the portable monitoring device is returned to our clinic and its recorded data will be promptly interpreted.

Home sleep studies have the benefits of sleeping in one’s own bed and not have the nightly routine interrupted. However, a home sleep study is only applicable to a selected group of patients and only used to diagnose obstructive sleep apnea. Furthermore, it is only conducted as part of a comprehensive sleep evaluation performed by our medical director.

 
New guidelines by The American Academy of Sleep Medicine states that home sleep tests can help detect obstructive sleep apnea (OSA) in selected, qualified adults.

For Your Home Sleep Study

  • Please arrive on time for your appointment, since it can take up to 30 minutes for the equipment to be hooked up.
  • Wear a shirt that you plan to sleep in: t-shirt or tank top.
  • We suggest you bring either a button-down or zippered top to put on after you have been hooked up.
  • Must make an appointment for the next morning to un-hook the equipment. Must be prior to 1 pm.
  • There is a $10 per hour charge for all un-hook appointments scheduled after 1 pm.
  • There is a $100 refundable deposit fee for the equipment. Please bring either a check or credit card to your appointment. The fee will only be taken in the case of broken or lost equipment.

Please download, print, and sign the Sleep Study Cancellation Agreement below.
Sleep Study Cancellation Agreement

Nap Studies – Multiple Sleep Latency Test (MSLT) & Maintenance of Wakefulness Test (MWT)

Both nap studies are done during the daytime.

An MSLT is used to see how quickly a person falls asleep in quiet situations during the day. This test is the standard way to objectively measure an individual’s level of daytime sleepiness and is used to diagnose hypersomnias such as narcolepsy. Excessive daytime sleepiness is when you’re tired when you should be alert and awake. The study is always preceded by an overnight PSG in the lab. It consists of a series of five daytime naps throughout the day in which the patient’s sleep is monitored, with similar sensors as those used in a PSG. These sensors will measure if you fall asleep and what stages of sleep you reach.

In contrast, the MWT is used to measure how alert a person is during the day and it shows whether or not the individual is able to stay awake for a set period of time. This type of test can show how well a person can remain alert and function during periods of quiet and inactivity, free from external influences that could affect your ability to fall asleep like light or noise.Unlike the MSLT, MWT is not preceded by an overnight PSG. It consists of a series of trials during which the sleep technologist will monitor the patient’s ability to resist the urge to fall asleep. This test is important to determine the patient’s ability to stay awake, how well their treatment is working, or if they’re too sleepy to perform tasks like driving.