CGRN - Certified Gastroenterology Registered Nurse Scope and Equipment Reprocessing Questions and Answers

Question 1

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?

Accepted Answer

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

Answer

Transport the scope in a covered container to the automated endoscope reprocessor (AER).

Answer

Perform a preliminary dry leak test on the endoscope.

Answer

Immerse the scope fully in a basin of high-level disinfectant.

Question 2

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

Accepted Answer

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

Answer

Non-critical devices requiring low-level disinfection.

Answer

Critical devices requiring sterilization.

Answer

Semi-critical devices requiring sterilization.

Question 3

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?

Accepted Answer

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

Answer

Continue the reprocessing cycle but label the scope for repair after disinfection.

Answer

Finish the manual cleaning, but skip high-level disinfection and send the scope for repair.

Answer

Submerge the scope deeper and angulate the controls to confirm the leak's exact location.

Question 4

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?

Accepted Answer

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

Answer

Once at the beginning of each shift.

Answer

Only when a new container of disinfectant is opened.

Answer

After every five endoscopes have been processed in the solution.

Question 5

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

Accepted Answer

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

Answer

Coiled tightly in its original transport case with all valves securely attached.

Answer

Placed horizontally on a clean, open shelf in the reprocessing room.

Answer

Sealed in a sterile peel-pouch and stored with other surgical instruments.

Question 6

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?

Accepted Answer

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

Answer

Soaking the scope in a saline solution for at least 30 minutes.

Answer

Using an automated endoscope reprocessor (AER) on its pre-clean cycle.

Answer

Rinsing the channels with 70% isopropyl alcohol before using detergent.