A., My child has had several MRIs since he was 12mos/9 mos adjusted. They just sedate them, they are not intubated or anything. The hardest part for me is always watching my child being put to sleep, and he has had lots of surgeries as well. If you don't think you are strong enough to watch your baby suddenly be asleep, have someone else take him back. A PP stated that the procedure itself doesn't take that long and this is true, and with the little ones, they send them home pretty quickly, but he may be sleepy, and more clumsy for the rest of the day.
My son has several developmental delays, due to his extreme prematurity. For example, he didn't walk until he was 23 mos. You can call Babies Can't Wait and make a referral yourself. They will evaluate your child and determine if he is elligible for services. We were with Babies Can't Wait from the time my son was 10 mos until he turned 3. Now he gets services through the school system. You just have to be prepared to be your own child's advocate.
Good Luck!