Before the procedure you’ll receive an intravenous medication consisting of a sedative and a pain medication to ease your discomfort. ERCP is always performed in a room with X-ray equipment. You will be asked to lie on either your left side or your stomach. A plastic mouth guard will be placed in your mouth. During the procedure a special camera called a duodenoscope will be used. Once you’re sedated, the tube will be passed into the esophagus and stomach. When the endoscope is in place, Dr. Singh will pump some air to open up your esophagus, stomach, and intestine for better viewing and access. Next, he’ll insert a thin tube containing dye through the endoscope and will gently guide it toward the main bile duct. The dye is then injected into the bile duct entering the duodenum, and – if necessary – into the pancreatic duct. Then X-rays are taken. If the X-rays reveal gallstones, they may be removed by Dr. Singh during the same procedure. If a narrowing of the ducts is identified, Dr. Singh may widen the narrowing by placing a stent (a small tube) to keep the duct open. If an abnormal tissue or growth is detected, Dr. Singh will take a tissue sample for a laboratory examination. The length of the ERCP procedure varies: it can take from 30 minutes to 1 ½ hours, depending on its complexity.