What type of surgery is described for a patient undergoing endoscopic retrograde cholangiopancreatography (ERCP)?

Endoscopic retrograde cholangiopancreatography (ERCP) primarily serves as a diagnostic procedure, allowing healthcare providers to visualize and assess the bile ducts and pancreatic ducts. This technique involves using an endoscope to inject a contrast dye into the ducts, followed by fluoroscopy to capture images, providing critical information about any obstructions, stones, or abnormalities affecting the biliary system and pancreas.

Although ERCP can also have therapeutic potential—such as removing stones or placing stents—the primary intent of the procedure is often to evaluate conditions rather than to treat them definitively. Thus, it is most accurately classified as a diagnostic type of surgery since it aims to aid in identification and further management planning of the patient's condition.