CER - Certified Endoscope Reprocessor Decontamination and Manual Cleaning Questions and Answers

Question 1

What is the primary function of an enzymatic detergent during the manual cleaning of a flexible endoscope?

Accepted Answer

To break down complex organic materials like blood, fat, and protein.

Answer

To kill microorganisms on the endoscope's surface.

Answer

To serve as a high-level disinfectant for internal channels.

Answer

To lubricate the channels, making brush passage easier.

Question 2

A technician is manually cleaning a colonoscope in a basin of enzymatic detergent. The technician follows the manufacturer's IFU for dilution but uses hot water, well above the recommended temperature range. What is the MOST likely negative consequence of this action?

Accepted Answer

The hot water will cause the proteins in the bioburden to denature and adhere to the endoscope.

Answer

The hot water will enhance the enzymatic activity, leading to a faster clean.

Answer

The hot water will damage the external sheath of the endoscope.

Answer

The hot water will sterilize the instrument, making disinfection unnecessary.

Question 3

Which of the following represents the correct sequence of initial steps when an endoscope arrives in the decontamination area for manual cleaning?

Accepted Answer

Leak testing, complete immersion in detergent, manual brushing of external and internal surfaces, rinsing.

Answer

Manual brushing, leak testing, immersion in detergent, rinsing.

Answer

Immersion in detergent, rinsing, leak testing, manual brushing.

Answer

Rinsing with water, leak testing, manual brushing, immersion in detergent.

Question 4

After meticulously brushing all channels of an endoscope with enzymatic detergent, what is the most critical reason for thoroughly rinsing the endoscope with water before it proceeds to high-level disinfection?

Accepted Answer

To remove detergent residues that could inactivate or interfere with the high-level disinfectant.

Answer

To cool the endoscope down before it enters the AER.

Answer

To remove any remaining bioburden that the brushes missed.

Answer

To prevent dilution of the high-level disinfectant by residual water.

Question 5

A reprocessor is manually brushing the biopsy channel of a gastroscope while it is submerged in detergent. After several passes, the brush still shows visible soil when it is inspected. What is the required next action according to reprocessing standards?

Accepted Answer

Continue brushing the channel until the brush emerges with no visible debris.

Answer

Proceed to high-level disinfection, as the AER will remove the remaining soil.

Answer

Use a larger, more abrasive brush to scrub the channel more effectively.

Answer

Flush the channel with alcohol and then proceed to the next step.

Question 6

Which of the following is a method used to biochemically verify the adequacy of the manual cleaning process by detecting residual organic material before high-level disinfection?

Accepted Answer

Adenosine Triphosphate (ATP) testing.

Answer

Microbiological culturing.

Answer

Borescope visual inspection.

Answer

Dry leak testing.