SLEEP TESTING

POLYSOMNOGRAPHY (aka PSG or OVERNIGHT SLEEP STUDY)

Polysomnography, also called PSG or an overnight sleep study, is a test used to record brain waves, the blood's oxygen levels, breathing, heart rate, and eye and leg movement during sleep. The hookup is painless and the information collected is sent to a board certified sleep medicine physician for review and diagnosis. In addition to being a diagnostic tool, this study is also used to adjust a patient's treatment, if they have already been previously diagnosed with a sleep disorder. Sleep Management Services provides Polysomnography studies at all of our independent and hospital locations across the state.

CPAP TITRATION

A CPAP (Continuous Positive Airway Pressure) titration study is used to determine the appropriate pressure settings for individuals requiring CPAP therapy. An appropriate pressure setting will allow an individual to achieve deeper sleep and will decrease the number of "events" occurring during sleep. CPAP is a common treatment for sleep disorders, especially obstructive sleep apnea. A CPAP titration study is the starting point that allows our physicians to ensure that patients receiving treatment through SMS are properly fitted with a comfortable mask and the appropriate pressure settings. This device delivers air through a mask, opening up the patient's nasal passages, allowing for a much deeper sleep. Mask sizes and settings are different for each individual patient, but it's our goal to help you find the perfect combination for you!

SPLIT NIGHT STUDY

For some patients with a suspected or previous diagnosed of sleep apnea, it may be appropriate to undergo a split-night study. This particular study lasts for a full night and usually consists of a polysomnogram followed by CPAP therapy. In some cases, physicians are able to both diagnose and treat a sleep disorder with the use of a split-night study, instead of breaking up the diagnosis and treatment into two different sleep sessions. Similar to the PSG, sensors measure a patient's brain waves, the blood's oxygen levels, breathing, heart rate, and eye and leg movement during sleep. If a patient has a number of breathing "events" surpassing a pre-established threshold, or if any other sleep problems are eminent, the physician will allow to center to begin the CPAP portion of the study. Split night studies are not appropriate in all situations, as they don't always allow for enough sleep time to make a definitive diagnosis and can sometime limit the amount of time need to properly adjust treatment.

MSLT / MWT

Unlike other sleep disorder tests, a Multiple Sleep Latency Test (MSLT) is used in the daytime and follows an overnight sleep study. Overall, this test monitors a patient's sleep patterns, and how quickly they tend to fall asleep. This test usually consists of a patient taking up to five 20-minute naps, spaced out every two hours. Patients attend their respective sleep study clinics during the day, but are allowed to wear their normal, daytime clothes, and are also provided meals. MSLT is a valuable tool used for diagnosing sleep disorders such as narcolepsy, as those who have the disorder frequently experience REM sleep, even during short naps during the day. The Maintenance of Wakefulness Test (MWT) is a daytime test that measures a patient's ability to stay awake. This test is commonly used to gauge daytime alertness, or a patient's response to previous sleep disorder treatments, such as narcolepsy. Unlike the MSLT, this test typically requires patients to sit in a room for up to five 40-minute sessions and remain attentive and awake. If the patient falls asleep, the session is stopped. These studies are usually done in two hour intervals, for at least an eight hour time period.

HOME SLEEP TESTING (aka OUT OF CENTER SLEEP TESTING)

Home Sleep Testing (or Out of Center Sleep Testing) provides a physician with the information they need to diagnose a sleep disorder-most commonly obstructive sleep apnea-while the patient conducts the experiment in the comfort of their own home. The equipment collects the information about how a patient breathes during their sleep. The patient undergoing the study is required to meet with a registered PSG technician to receive instructions for how to use the device. While providing less information than an in lab PSG, in home devices measure oxygen levels in the blood and breathing and heart rate. While a lab sleep study done in a sleep center or hospital provides the most thorough evaluation of a patient's sleep disorder, a physician may recommend a home sleep test as required by many insurance companies for an individual showing symptoms of moderate to severe sleep disorder, but without any other significant medical concerns.