Is Needle Knife Fistulotomy An Effective First Step Strategy For All ERCPs?

The ERCP procedure enables doctors to examine the regions of the digestive system called the pancreas and bile ducts. After sedating a patient, a bendable tube with a light (called an endoscope), is inserted through the mouth and into the digestive system. Within the digestive system, the doctor is able to identify the opening to where the gallbladder drains into the small bowel called the ampulla. Using the endoscope, a small plastic tube is then placed in the opening and dye (also called contrast material) is injected bile duct (where bile leaves the liver from). X-ray pictures can then be taken to provide further information to the doctor.

Sometimes it is necessary to make a cut to enlarge the opening to allow easier removal of stones from the bile duct or to place plastic tubes (stents) in the bile duct. To make this cut, there are two different approaches that the doctor can take:

1. The standard way of making the cut is referred to as a "sphincterotomy". Using this method, a heated metal wire cuts the opening to the bile duct after a wire has been passed into it.
2. The second way of making the cut is referred to as a "pre-cut". There are various types of "pre-cut" techniques; the technique being evaluated in this study is called the "needle knife fistulotomy". When using this technique, the doctor makes a cut directly into the bile duct using a tiny knife called a "needle knife".

Currently, there is not a standard that tells doctors what cutting technique to use. The decision is entirely up to the individual doctor.

Patients that participate in this study give their permission to allow the study doctor to use the "needle knife fistulotomy" cutting technique first to gain access to the bile ducts. If the study doctor is unable to gain access through this method, then they will use the standard sphincterotomy technique.