I have no intention to start a fight here but I need to clarify one thing: Practicing regional anesthesia requires in depth understanding of several things: 1- Anatomy 2- Physiology of the nervous system 3- Pharmacodynamics and pharmacokinetics of local anesthetics and additives. 4- Ability to diagnose and treat immediate and delayed complications. I have worked with CRNA's every day for many years, and still have to see a CRNA who has these abilities. This is why regional anesthesia is beyond the capacity of CRNA's. Unless we are talking about some form of super CRNA I haven't been privileged to meet yet.