central sleep apnea

we went today to the sleep specialist and it turns out lexi has central sleep apnea. what that means is she forgets to breath. they said her oxygen is normal but her carbon dioxide is really high. so now we have to get a mri of her brain stem and send her to a ent to make sure her tonsils and adnoids dont need to come out since she did have a couple obstructive apnea while we had the sleep study. then if everything comes out ok then we will try the c pap