I have similiar queston. I can tell you that 20 years ago I was trained to place weighted small bore feeding tube but that I was the only one and went thru very thorough training. I am in an extensive lit search without much success. It seems most today recomend that these are place fluroscopically or with new endscopic tube. To me this is phyhsican practice but nurses in several insititutions here do place PICC lines in Radiology. Is this not a similair practice? I think if insertion is by an RN that RN needs to be trained and complete a comeptancy on this skill. The RN under our state pracitice acts is performing a function delegated by the physician so the hospital would assume liablity. Please let me know if you find any other more concrete practice guidelines.