Endoscopic retrograde biliary drainage (ERBD) is now widely accepted as the standard
intervention for the relief of obstructive jaundice in patients with unresectable malignant
biliary obstruction. Although plastic stents (PSs) were developed earlier, self-expandable
metal stents (SEMSs) are now used widely as the initial choice for ERBD in this setting, as
SEMSs offer longer patency.However, SEMSs do become occluded in some patients. There are a
limited number of reports on the management of occluded SEMS with various results. The aim of
this study is to compare the efficacy of ComVi stents SEMSs with uncovered SEMS in subsequent
ERBD after the occlusion of initial SEMSs.