One of the most effective ways to diagnose sleep disorders is to
observe and record various bodily activities and responses during
sleep. The Sleep Disorders Center at Glendale Adventist offers a
variety of sleep studies that are performed and assessed by
specially trained physicians and technicians.
Overnight Sleep Assessment
An overnight sleep assessment is a controlled, in-depth study of
the activities of the brain and body during sleep. Patients
normally arrive between 8PM and 10PM to prepare for the study,
then spend the night in a specially equipped private room. They
are free to go home soon after they wake up the next morning.
During the assessment, Sleep Center staff measure a number of
- Brain waves
- Eye movement
- Heart rate
- Respiratory movements
- Air flow
- The level of oxygen in the blood
- Muscle movements in the leg
Monitoring each of these functions gives the Sleep Center staff
an idea of:
- When the patient is awake and asleep
- The depth of the patient's sleep
- How often the patient wakes up during the night
- What causes the patient to wake up
- The patient's breathing patterns during sleep
- Other important clues that provide an overall picture of the
patient's sleep activities.
Records made during the sleep assessment, called polysomnographs,
are interpreted by a board-certified sleep specialist and the
Sleep Center's medical director. From there, a report is sent to
the patient's personal physician, along with recommended
Home Sleep Study
To diagnose sleep apnea, Glendale Adventist now offers a home
A split study helps Sleep Center staff determine if treatment for
sleep apnea will make a difference in the quality of sleep the
patient gets.During part of the overnight sleep assessment,
patients are placed on CPAP
(continuous positive airway pressure) to determine if that device
eliminates their sleep apnea and improves their sleep.
Multiple Sleep Latency Test
The Multiple Sleep Latency Test (MSLT) helps to determine if a
person is abnormally sleepy during the day and how severe the
daytime sleepiness is.
During an MSLT, the patient goes into a specially equipped, dark
room during daytime hours and attempts to fall asleep. This
experiment is repeated four or five times during the course of
the day. A Sleep Center staff member observes the patient on a
closed-circuit television monitor to see how long it takes him or
her to fall asleep.
Each one of the nap tests lasts for 20 minutes. People who are
not abnormally sleepy will take at least 10-12 minutes to fall
asleep or will not fall asleep at all. Those who fall asleep in
less time have some degree of sleep disorder, and those who fall
asleep in five minutes or less have a severe sleep deficit.
If the MSLT shows signs of a sleep disorder, the Sleep Center
staff may perform further tests to discover the cause of the
daytime sleepiness, such as insufficient sleep syndrome, sleep
apnea or, in rare cases, narcolepsy.
Your treatment will be based on the root cause of your
Sleep Disorders home