CGRN - Certified Gastroenterology Registered Nurse Infection Prevention and Control Questions and Answers

Question 1

After an ERCP on a patient with a known Carbapenem-resistant Enterobacteriaceae (CRE) infection, which step in reprocessing the duodenoscope is most critical for preventing transmission due to the complex design of the elevator mechanism?

Accepted Answer

Manual cleaning, which includes meticulous brushing of the elevator wire channel and elevator recess.

Answer

Automated high-level disinfection, as it provides a standardized, validated cycle.

Answer

Final alcohol flush and forced air drying to prevent waterborne pathogen growth.

Answer

Leak testing to ensure the integrity of the endoscope's internal channels.

Question 2

A CGRN is preparing a room for a patient with a confirmed, active *Clostridioides difficile* infection. In addition to standard and contact precautions, which environmental cleaning measure is required?

Accepted Answer

Using an EPA-registered sporicidal disinfectant for daily and terminal cleaning.

Answer

Wiping all high-touch surfaces with a standard quaternary ammonium-based disinfectant.

Answer

Ensuring the room is under negative pressure ventilation.

Answer

Placing an air purifier with a HEPA filter in the room.

Question 3

Which of the following describes the best practice for storing a fully reprocessed and dried flexible endoscope to maintain its high-level disinfected status?

Accepted Answer

Hung vertically in a closed, well-ventilated cabinet.

Answer

Coiled tightly in its original carrying case to protect it from damage.

Answer

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

Answer

Sealed in a plastic bag with the valves attached to keep them with the scope.

Question 4

Immediately following an upper endoscopy, the CGRN begins the first step of endoscope reprocessing at the point of use. Which of the following actions is correct?

Accepted Answer

Wiping the insertion tube with a detergent-soaked cloth and flushing air/water and suction channels with an enzymatic solution.

Answer

Transporting the scope in a covered basin directly to the decontamination room.

Answer

Immersing the entire endoscope in a basin of sterile water to prevent drying.

Answer

Detaching all valves and placing them in a separate bag for transport.

Question 5

To ensure the efficacy of a reusable high-level disinfectant (e.g., glutaraldehyde, peracetic acid) in an Automated Endoscope Reprocessor (AER) or a manual soaking basin, what quality control measure is essential prior to each use?

Accepted Answer

Testing the solution for its Minimum Effective Concentration (MEC) with a chemical test strip.

Answer

Verifying the solution's temperature is above 25°C (77°F).

Answer

Documenting the date the solution was first poured into the basin.

Answer

Checking the pH of the solution to ensure it is within neutral range.

Question 6

A CGRN is preparing reusable biopsy forceps for the next procedure. According to the Spaulding classification system, what is the required level of reprocessing for this accessory?

Accepted Answer

Sterilization

Answer

Low-level disinfection

Answer

Manual cleaning with an enzymatic detergent

Answer

High-level disinfection (HLD)