I was challenged today regarding a decision to exchange a picc that was malpoitioned on the first CXR. I would do a wire exchange of this line if I didnt think I could flush it down to the correct position. My colleague would prefer to pull the line back and readvance it to attempt to fix the malposition after making a sterile field again. What is the correct thing to do? We use to do one reposition under "sterile field" but I remember learning this may not be the best thing for the patient.