Medical devices including devices and systems for endoscopic interventions that may access the biliary tree. An example biliary catheter system may include an endoscope having a working channel formed therein. An endoscopic instrument may be disposed in the channel. The endoscopic instrument may have a tool channel formed therein, a distal end, and a plurality of stabilizing members extending from the distal end. The plurality of stabilizing members may be configured to surround the ampulla of Vater during a biliary tract intervention.
