I am going in for my next sleep study in a coulpe of week which is just to make sure that the cpap machine is helpingme sleep. I also was told i would have to do a Maintenance of wakefulnees test (MWT). Has anyone done one of these and what does it involve.

I've not had one done myself, maybe someone else can chime in who has experienced the test.

But, here's some info I found on the web regarding the test:

An (MWT) Maintenance of Wakefulness Test can provide an objective measure of your ability to stay awake and alert. At 2-hour intervals during the day, you will be asked to rest in a semi-reclined position in a comfortable, darkened room, relax and try to stay awake and avoid napping. We will record your brain wave activity (EEG) and determine if you fall asleep, how quickly sleep occurs, and how long you sleep. We will also ask you to report if you fell asleep and if you dreamed. Your MWT will run from about 9 am to 4 pm (if you abide by a traditional sleep-wake schedule).

Some important things to remember before your MWT:

Be sure to get an adequate amount of sleep for at least one week (preferably
two) prior to the study (7-9 hours on a regular schedule)

Do not use caffeine the day of the study (if you drink more than 2 caffeinated
beverages per day then you will need to reduce your caffeine intake by 1
caffeinated beverage per day in advance to ensure that you do not suffer from
caffeine withdrawal headaches during your nap study

Most medications do not interfere with the MSLT. If you are on any stimulating medications be sure to check with your referring physician to determine if they want to assess your alertness at baseline off stimulants or if they want to assess residual sleepiness on stimulants. Wean off of your stimulant medication gradually if your doctor has instructed you to do so. DO NOT DRIVE if you are off your stimulant!

Bring all medications with you

Bring lunch & a snack or money for lunch

Bring relaxing reading material or a CD/MP3 player to occupy your time between naps