FACTORS ASSOCIATED WITH DIFFICULT BILIARY CANNULATION IN A TRAINING CENTER FOR ENDOSCOPIC INTERVENTION OF THE BILIARY TRACT.

Background: This paper aims to determine factors associated with difficult biliary cannulation (DBC) that are identifiable before procedures.

Methods: This is a nested case-control study within a historical cohort in adult patients undergoing endoscopic retrograde cholangiopancreatography (ERCP) from 2015-2019 in the Hospital Universitario San Ignacio, Colombia. This study assessed the associations among variables that could be identified before or at the beginning of procedures and the probability of DBC.