I'm finishing FNP school shortly and have been in IR as an RN for 5 years. NPs and PAs both do IR. I find that preference for one over the other seems to be regional. I will be doing a final clinical rotation in IR where I place HD caths, ports, do paras and thoras, liver bxs, etc, under an NP and a PA. In my facility, these have been performed independently by PAs and NPs (doc in house, but not in procedure room).