An ERCP, which stands for Endoscopic Retrograde Cholangiopancreatography (yes that is a mouthful), is a procedure that uses a tool called an endoscope to look inside your body at the liver, pancreas, bile ducts and gall bladder. An endoscope is a long slim tool that is inserted through the body. It has several uses. The endoscope itself is a hollow tube that allows doctors to insert other tools or dyes into the patient's body.
The patient's throat is numbed and they are given a sedative so that they can relax through the procedure. The patient then swallows the endoscope and the doctors help to guide it to the area they are wishing to look at. Once the scope reaches its destination, the doctor immediately inserts a dye into the scope. Once the dye is in place, x-rays are taken to give the doctor a better look at what is going on in the patient's system.