Certified Endoscope Reprocessor (CER) Practice Test 2026 - Free Endoscope Reprocessing Practice Questions and Study Guide

The duodenoscope, particularly in the context of endoscopic retrograde cholangiopancreatography (ERCP), is classified as a high-risk endoscope according to the ST91:2021 standards. This classification arises from the design and intended use of duodenoscopes, which are specifically engineered for accessing the bile and pancreatic ducts. These scopes are more challenging to reprocess due to their complex structure, which typically includes tight spaces and intricate channels that can harbor residues and pathogens if not adequately cleaned.

The high-risk designation acknowledges the significant potential for cross-contamination and infections related to procedures performed with these instruments. This risk is especially pronounced given the types of patients these endoscopes are often used for, many of whom may have compromised immune systems or other health issues. Understanding the reprocessing standards and protocols for high-risk devices like the duodenoscope is essential for infection control and maintaining patient safety.

Other types of endoscopes listed, such as gastroscopes, sigmoidoscopes, and colonoscopes, do not carry the same level of risk in terms of their design and potential for infection transmission during routine procedures, thereby categorizing them as lower risk in comparison to duodenoscopes.