Enlarged fistulotomy of the papilla as access to the biliary tract during ERCP.

Background: Demonstration of access to the bile duct through Enlarged Papillary Fistulotomy, a method different from conventional fistulotomy.

Aims: Demonstration of the EFP technique with dissection in layers of the papilla for accessing the common bile duct, its efficiency and safety, rescue of cases of failure in cannulation and cases of access failure by EFP in the first attempt, facilitating cannulation in the second attempt.

Methods: Cross-sectional study, with retrospective data collection from 2233 ERCP exams with 528 EFP procedures, analysis of success and complications.