First off Welcome to the CPAP adventure, and on becoming a Hose Head! Yes Sleep Apnea can be extremely dangerous, note "can be" lets compare it to somebody putting a plastic bag over your head and holding it there untill you start to panic and struggle and start gasping for air, and then the person takes it off of you, lets you take a few breaths and then does all over again, and lets say the person does this to you a minimun of 30 times an hour (note I said MINIMUM! of 30 times and hour, because severe sleep apnea is considered having an apnea a minimum of 30 times and hour) and having that done to you every hour, all night long! That is what your body is experiencing with severe sleep apnea! And if that bag is held over your head long enough your Oxygen saturations in your blood may drop, and if it drops to low, and or for to long a time it can kill off brain cells and it can cause you to have Heart Attack and or a Stroke in your sleep! Are you getting the picture? Not Good Huh? Some of us with Sleep Apnea besides having a XPAP machine (either CPAP, BiPAP, or and ASV machine) along with amask also have to have supplemental Oxygen, I have an Oxygen Concentrator which is set to give me 3 Liters per minute of O2 along with my VPAP Adapt SV machine!
So they are setting you up with a Split sleep study? With a split study, the first half of the night will be a normal sleep study, to find out how bad your sleep apnea really is and what type of sleep apnea your having, Obstructive Sleep Apnea (OSA) the most common where your throat collapses on its self and blocks the oxygen from getting to the lungs ( think of the throat as being a fire hose and when there is no pressure it collapses flat) , Central Sleep Apneas (CSA) for what ever reason your brain periodicly quits telling you to breath)( pain meds can often cause Central apneas, as well as Cervical Spinal Cord Injuries and Congestive Heart Failure to name a few) Or Complex Sleep Apnea or Mixed Sleep Apnea (MA) a combination of OSA and CSA.
Anyway after they get enough information they will come in and put a mask on you and hook you up to a machine, and tell you to go back to sleep! This is the Titration study to find out what they need to do to get rid of the Apneas! Then through their controls, as you sleep they will adjust the pressure until they reduce or eliminate the sleep apneas that your having! If they can not get enough data the first half of the study, they might just do it all night and have you come back for the titration study. Actually that is the better way of doing it because they have more time to get a more accurate picture of your sleep! And then on the second study (titration study) they have more time to get your pressure adjusted just right! You might even want to ask them about doing a two night study, as they can be more accurate and better for you, especially if you have a difficult time getting to sleep. During both studies You will be wired up, think of EKG and EEG all in one! They will put wires (electrodes) on your head (EEG) wires, electrodes on your chest and legs(EKG)
and a sensor in or under your nose and a strap sensor around your chest.all the wires are hooked up in a harnass, and then when you go to bed they will connect up the harnass and then they willl watch you with a night video camera, and they can also hear you and you will be monitored all night long as you sleep! ( I have had 6 of these done in 18 months I have severe Complex sleep apnea)
If I can help you in anyway just E-mail me! Oh yea if you get any advance notice of when your sleep study is, then try and make sure you are extra tired ( no naps during the day) Also these studies can detect other sleep problems PLMD periodic linb movement disorder akin to Restless lLeg Syndrome, and a host of other sleep problems!
Good Luck to You