Use of combined laboratory and ultrasonography results to select patients for biliary tract imaging or intervention: a retrospective cohort study

Abstract Aim: To determine whether combined laboratory and ultrasonography results can be used to select patients for biliary tract imaging (BTI) or intervention. Background: Despite ongoing research, selection of patients with suspected CBD stone (CBDS) for BTI or direct intervention without imaging is still a subject of debate. Methods: Patients aged≥18 with symptomatic gallstone disease (SGD) who underwent MRCP over 3 years (2014-2017) were divided into the following cohorts: Group A: Normal liver enzymes with normal CBD diameter; Group B: