my 18 month old grandson has been hospitalized for 5 days originally w/pneumonia which has cleared but O2 and heart rate drop when he sleeps, he had a shunt put in at 6 mos for hydrocephalus w/seemingly no complications....chest x-ray is clear and local pediatricians are just well...nothing...we're frustrated and see no end in sight...baby seems to do okay on room air during wakeful times but is worse than when he started at night. darn it all.