Examiners perform ERCP with the help of an endoscope. An endoscope is a long, flexible scope. The examiner passes the endoscope through the mouth and down to the small intestine. A thin tube is then passed through the endoscope. The tube delivers a contrast dye.
Examiners view the pancreas and ducts by fluoroscopy and still x-rays.
Fluoroscopy uses continuous x-rays to create a moving image. The examiner may take a biopsy or widen a duct before removing the endoscope. After the test, the person usually is observed for several hours. The person may feel dizzy, nauseated, or bloated for a while, and should not eat or drink until the gag reflex returns. A sore throat may occur for 3 or 4 days.