My son is in iccu as an lpn i know nothing about certain things. 1. We are told that d/t multiple intubations multiple bouts of aspiration pnuemonia they are having a very hard tlme weaning him back off of vent. They are also saying that from bere on out each time he is intubated will get harder and harder to get him back off it why? 2. When pic port becomes clogged are you suppose to use excessive force to try to flush it clear? Thanks for any help.