Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
In direct peroral cholangioscopy, an ultraslim upper endoscope is inserted through the mouth and advanced to the duodenum. It is subsequently maneuvered across the biliary sphincter and into the bile duct for observation of the mucosa and the lumen of the bile duct.
