Scope and Equipment Reprocessing Flashcards

A new GI technician has just finished assisting with an EGD. What is the most critical initial step they must perform in the procedure room to begin the reprocessing cycle and prevent biofilm formation?

Answer: Wipe the insertion tube and flush/suction all channels with an enzymatic detergent solution.

Bedside pre-cleaning is the crucial first step to remove gross organic debris and prevent the drying of bioburden, which can lead to biofilm formation. This step, which includes wiping the exterior and flushing/suctioning the channels with a detergent, must be performed immediately after the procedure and before the scope is transported to the reprocessing area.

According to the Spaulding classification system, which is fundamental to device reprocessing guidelines, flexible endoscopes that contact mucous membranes are classified as:

Answer: Semi-critical devices requiring, at a minimum, high-level disinfection (HLD).

Flexible endoscopes, such as colonoscopes and gastroscopes, contact intact mucous membranes but do not penetrate sterile body tissues. The Spaulding classification system categorizes these instruments as semi-critical. The minimum required standard of reprocessing for semi-critical devices is high-level disinfection (HLD).

During the manual cleaning phase, a reprocessing technician performs a leak test on a colonoscope and discovers a continuous stream of bubbles emerging from the bending section. What is the most appropriate immediate action?

Answer: Abort reprocessing, remove the scope from water while still pressurized, and send it for immediate repair.

A positive leak test indicates a breach in the endoscope's integrity. Continuing to immerse the scope will allow fluid to enter internal mechanisms, causing significant damage and creating a potential source for infection that cannot be reached by disinfectant. The correct action is to stop the reprocessing, remove the scope from the water, and send it for repair according to facility protocol.

The CGRN is overseeing the manual high-level disinfection (HLD) process. To ensure the chemical disinfectant's potency, the reprocessing technician must test the solution's minimum effective concentration (MEC). According to multi-society guidelines, how often should this MEC test be performed?

Answer: Prior to each endoscope immersion or at least daily, whichever is more frequent.

Professional guidelines from organizations like the CDC and SGNA mandate that the Minimum Effective Concentration (MEC) of a reusable high-level disinfectant must be tested before each use (or each cycle) or at a minimum, daily. This quality control step is critical to verify that the solution's potency has not been compromised by dilution or inactivation, ensuring it remains effective.

Which of the following represents the correct method for storing a high-level disinfected and thoroughly dried flexible endoscope to prevent recontamination?

Answer: Hanging vertically in a dedicated, well-ventilated cabinet with valves and caps removed.

To prevent recontamination and inhibit microbial growth, endoscopes should be stored by hanging them vertically in a closed, well-ventilated cabinet. This position facilitates drainage of any residual moisture. Removing valves and storing them separately also promotes drying and prevents contamination.

The manual cleaning phase is often cited as the most critical step in endoscope reprocessing. Which action is essential for effectively removing bioburden from internal channels during this phase?

Answer: Brushing all accessible internal channels with a correctly sized brush until visibly clean.

Manual cleaning, which involves the mechanical friction from brushing all internal channels, is the most important step in removing adherent bioburden. If bioburden is not physically removed, it can shield microorganisms from the high-level disinfectant used in the next step, potentially leading to reprocessing failure and cross-contamination.