CMDRT - Certified Medical Device Reprocessing Technician Flexible Endoscope Reprocessing Questions and Answers — Questions and Answers
Question 1: Which of the following actions is the most critical first step in the reprocessing of a flexible endoscope, performed at the point-of-use immediately after the patient procedure?
- Wiping the insertion tube with an enzymatic sponge and flushing channels with detergent. (Correct answer)
- Rinsing the insertion tube with sterile water.
- Performing an initial dry leak test.
- Detaching all removable valves and buttons.
Correct answer: Wiping the insertion tube with an enzymatic sponge and flushing channels with detergent.
Point-of-use pre-cleaning is the first and one of the most critical steps in endoscope reprocessing. Wiping the exterior and flushing the internal channels with a recommended detergent solution immediately after the procedure prevents the drying of blood, body fluids, and other organic matter. This action significantly reduces the bioburden and prevents the formation of biofilm, which is difficult to remove in later cleaning stages.
Question 2: What is the primary rationale for flushing all channels of a flexible endoscope with 70% isopropyl alcohol followed by forced filtered air after high-level disinfection?
- To provide an additional microbicidal action against any remaining pathogens.
- To facilitate rapid drying and prevent the growth of waterborne microorganisms during storage. (Correct answer)
- To neutralize any residual high-level disinfectant left after the final rinse.
- To verify the patency of the channels one final time before storage.
Correct answer: To facilitate rapid drying and prevent the growth of waterborne microorganisms during storage.
The primary purpose of the alcohol flush is to aid in drying the endoscope channels. Alcohol mixes with remaining water and evaporates more quickly. This, combined with forced air, removes moisture, which is critical for preventing the proliferation of waterborne microorganisms, such as Pseudomonas, during storage.
Question 3: A technician performing a leak test on a flexible gastroscope observes that the pressure gauge fails to hold a steady pressure and drops continuously. Which of the following is the most appropriate immediate action?
- Proceed with manual cleaning but flag the scope for repair later.
- Re-pressurize the scope to a higher PSI to locate the leak.
- Discontinue the reprocessing procedure, document the failure, and send the endoscope for repair. (Correct answer)
- Submerge the pressurized scope in water to visually confirm the leak's location.
Correct answer: Discontinue the reprocessing procedure, document the failure, and send the endoscope for repair.
A failed leak test indicates a breach in the scope's integrity. Continuing the reprocessing procedure would allow fluids to enter the internal components, causing catastrophic damage. The scope must be immediately removed from service, the issue documented, and the device sent for repair to prevent fluid invasion.
Question 4: An MDRT is loading a complex flexible duodenoscope into an Automated Endoscope Reprocessor (AER). The technician correctly connects the hookups for the main channels but overlooks the specific, smaller connector for the elevator wire channel. What is the most likely consequence of this oversight?
- The elevator wire channel will not be adequately high-level disinfected. (Correct answer)
- The AER will alarm and stop the cycle because it detects a missed connection.
- The cycle time for the AER will be significantly shorter due to lower fluid volume.
- The exterior of the endoscope's distal tip will not be properly cleaned.
Correct answer: The elevator wire channel will not be adequately high-level disinfected.
AERs rely on the user to attach specific channel connectors to ensure that cleaning solutions and high-level disinfectants are flushed through every internal lumen. Failure to connect a dedicated lumen, such as the elevator wire channel, will result in that channel not being exposed to the disinfectant, leading to a reprocessing failure and posing a significant risk to patient safety.
Question 5: A technician is manually cleaning a flexible colonoscope. After thoroughly brushing all accessible channels while the scope is fully submerged in an enzymatic solution, what is the critical next step *before* moving to the final rinse stage?
- Perform a second leak test to ensure the brushing did not cause damage.
- Flush the channels with 70% isopropyl alcohol to begin disinfection.
- Visually inspect the scope's exterior for damage with a magnifying lamp.
- Actuate all movable parts and raise/lower elevators to dislodge trapped debris. (Correct answer)
Correct answer: Actuate all movable parts and raise/lower elevators to dislodge trapped debris.
After the initial brushing of the channels, it is critical to actuate any moving parts, such as the elevator on a duodenoscope or angulation controls, while the scope is still submerged in the cleaning solution. This action helps to dislodge and remove bioburden that may be trapped in these complex mechanical areas, ensuring they are thoroughly cleaned.
Question 6: According to CSA standards and industry best practices, how should a properly reprocessed flexible endoscope be stored to maintain its quality and prevent contamination?
- Hanging vertically in a dedicated, well-ventilated, and closed storage cabinet. (Correct answer)
- Coiled loosely in a sterile, breathable bag and placed on a shelf.
- Horizontally on a wire rack inside the original transport case.
- Wrapped in a sterile towel and stored in the general sterile supply room.
Correct answer: Hanging vertically in a dedicated, well-ventilated, and closed storage cabinet.
Best practices and standards, such as CSA Z314, recommend storing flexible endoscopes by hanging them vertically in a dedicated, closed, and ventilated cabinet. This position uses gravity to facilitate the drainage of any residual moisture from the internal channels, minimizing the risk of microbial growth and recontamination.
CMDRT - Certified Medical Device Reprocessing Technician Flexible Endoscope Reprocessing Questions and Answers
Which of the following actions is the most critical first step in the reprocessing of a flexible endoscope, performed at the point-of-use immediately after the patient procedure?