We are starting to use NIPPV more on the ELBW babies but have trouble with alot of air in the belly, Causing feeding issues (vomiting from excess air)Trying the RAM cannula but doesn't seem much better with the air. What do you do about the excess air besides aspirating every hour. Also do you get the PIP set? We use the Draeger VN500 and if we set a PIP of 20 we may get 13 if we're lucky.