Here's the tricky part. I was trying to make it idiot-proof enough that she knew how to hook it up herself every night and disconnect herself in the morning. However, I don't know enough about medical equipment to know if that could be the case, much less how to describe the equipment or the process of getting it all in place.
Furthermore, it occured to me (here comes the TMI part) that if she had to use the little girl's room in the middle of the night, it would be a huge hassle to disconnect and reconnect all that stuff, so they might decide to give her a catheter as well, but I definitely don't know whether something like that could be, erm, self-administered... I've (thankfully) never had to deal with catheters myself and they never show that part on medical shows. And would they even bother with that?
So for those who know hospitals better than I, could you fill me in on the procedures above, as well as anything else I might not have thought of?
EDIT: You've sufficiently convinced me that the catheter isn't happening. I also want, at least later in the story, for her to have some more independence in connecting everything herself, so she'll probably enter a home care situation at some point. That leaves the question of what all this equipment will look like and how to describe the procedure of setting it up: I'll Google and Wiki "sleep apnea" but if anyone wants to chip in details, especially procedural, I'd appreciate it.