ERCP is the abbreviation of "retrograde cholangiopancreatography", which refers to retrograde cholangiopancreatography with duodenoscope. The specific operation methods are as follows: 1. Anesthesia, generally intravenous general anesthesia. After successful anesthesia, a duodenoscope (similar to a gastroscope) is inserted into the mouth, and the endoscope reaches the middle part of the duodenum (the common bile duct of the hepatobiliary and pancreatic system, which opens in the duodenum). Find the common bile duct opening in this part, and insert all kinds of special guide wires and tools into the common bile duct opening from the lens end of duodenum (the duodenoscope itself contains all kinds of related working channels, which are specially used for the operation of all kinds of related instruments). Through these tools, we can complete cholangiography of hepatobiliary system/pancreatic duct and perform related surgical treatment at the same time. If a tumor is found, a specimen can be taken for pathological examination or biliary stent placement. If there is a stone, you can take it out with relevant tools.

Generally speaking, ERCP is a technical activity with the advantages of less trauma, quick recovery, exact curative effect and convenient examination and treatment. The disadvantage is that it is more invasive and has certain risks.