So very sorry to hear about your nephews troubles! What a terrible thing to happen! I can well imagine the amount of worry you are all going through - and the fact that the doctors can't figure out what's wrong makes it much, much worse. I don't think a breathing monitor will with a child, they are terribly uncomfortable (I suffer from apnea and have to have sleeping tests done periodically). Maybe a regular monitor (the kind that parents use to listen to their babies in another room) put very close to the baby's head and set at the maximum volume would work. They are not that expensive and worth a try, I would think. I don't pray but I will keep you and your family in my thoughts.