The Duodenum: Examined by Gastroscope or Colonoscope?

The duodenum is part of the upper gastrointestinal tract, which is typically examined using an upper gastrointestinal endoscope. This type of examination primarily involves the use of a gastroscope or a duodenoscope. If the concern is related to conditions such as inflammation or ulcers in the duodenum, a standard gastroscope is usually sufficient for diagnostic purposes.

When a Gastroscope Is Enough

For most common duodenal issues like inflammation or ulceration, a gastroscope allows doctors to effectively visualize the first part of the duodenum. This procedure is minimally invasive, widely available, and provides clear images necessary for accurate diagnosis.

When a Duodenoscope Is Necessary

However, if the medical concern involves deeper sections of the duodenum—such as the horizontal or ascending portions—a duodenoscope becomes essential. This specialized instrument enables physicians to access and examine areas beyond the reach of a standard gastroscope.

Procedures That Require a Duodenoscope

In addition to visual examination, certain diagnostic and therapeutic procedures like endoscopic retrograde cholangiopancreatography (ERCP) require the use of a duodenoscope. This allows for precise catheterization of the papilla of Vater and imaging of the biliary and pancreatic ducts.

Why a Colonoscope Isn't Used

It's important to note that the duodenum is not part of the lower gastrointestinal tract, so a colonoscope—which is designed for examining the large intestine—is not appropriate for evaluating duodenal conditions. Therefore, for duodenal examination and related procedures, either a gastroscope or a duodenoscope is the correct choice depending on the clinical need.