Sleep Studies Info - PSG (Polysomnogram)

Overnight Polysomnogram Sleep Study (PSG)

What is an Overnight Polysomnogram?

Who gets it?
A polysomnogram is often used in the following cases:
• To look for sleep-related breathing disorders, such as sleep apnea
• To set the correct levels of continuous positive airway pressure (CPAP) in patients with sleep related breathing disorders
• To go along with a daytime nap study to see if someone has narcolepsy
• To look for behaviors during sleep that can be violent or could be harmful to the patient or others

What happens when I have it?
Our Technologist will go out of their way to make you feel relaxed. You will be asked to come to the clinic in the evening. Some time will be given for you to make yourself at home in the bedroom. No other patients will be in the room with you. You will not feel any pain during the polysomnogram. The sensors are gently placed on your skin and connected to a computer. The wires are long enough to let you move around and turn over in bed. You will be asked to
move your eyes, clench your teeth and move your legs. This will make sure that the sensors are working. You are free to read or watch TV until your normal bedtime. Then the lights are turned out and it is time for you to try to fall asleep. A low-light video camera allows a technologist to see you from a nearby room. He or she will have to enter your room if a sensor comes loose. He or she will also have to detach the wires if you need to vgo to the bathroom during the night.
The polysomnogram is not a test that you can fail. Nearly everyone falls asleep during the study. Most people do not sleep as well as they do at home. This will not affect the results. In most cases, you do not need to sleep for a full eight hours to find the source of your problem .
In the morning the sensors will be tested again, and then they will be removed. This will complete the study, and you will be free to go. You may be tired if you did not sleep well during the night. Otherwise, you can return to normal activities on the day after a sleep study.

Who reads it?
Our chief technologist is the first one to look over the data from all sleep study. First, he will chart your sleep stages. Then, he will look for any events of abnormal breathing or leg movement. The results will be given to Dr. Clerk. He will then review the study to find out what kind of sleep problem you may have. Sleep Medicine Services is accredited by the American Academy of Sleep Medicine (AASM). The AASM sets strict standards for centers to maintain. This is to make sure that patients with sleep disorders get the highest level of care. In this center, the results of all Sleep studies are always reviewed by our sleep specialist (Dr. Clerk) who is certified by the American Board of Sleep Medicine
How do I get the results?
It will usually take two to three working days to get the results of a Sleep study. The doctor who ordered the study will discuss the results with you and the next best course of action. If your primary care doctor ordered it, then the results are sent to him or her. If you met with Dr. Clerk in the sleep center, he will tell you the results


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Hours of Operation

[Dr. Clerk's Office Hours:]
Monday to Friday
Closed for Lunch: 12pm to 1pm
9am to 5pm

[Clinic Hours:]
(For Overnight Sleep Study Only)
Monday to Saturday
8:15pm to 7am

[Contact Info:]

Phone: (408) 295-4532

Fax: (408) 295-4738


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