Selective cannulation of common bile duct (CBD) by insertion of a guide-wire seems to be associated with fewer complication and post-ERCP pancreatitis (PEP) rate than the conventional biliary tree access with contrast injection even if results are conflicting. The aim of our study is to test a new guide-wire (loop-tip wire) with a loop in the tip for the prevention of PEP and biliary tree access, in PEP high-risk patients.