CER High-Level Disinfection Processes 4

Question 1

What happens to the reuse life of an HLD solution when it is diluted by repeatedly immersing wet endoscopes?

Accepted Answer

The concentration drops and reuse life is shortened

Answer

Water introduced by wet scopes dilutes the HLD solution, lowering its concentration and potentially shortening the time it remains above the minimum required concentration.

Question 2

According to AAMI ST91, what type of water should be used for the final rinse of a high-level disinfected endoscope?

Accepted Answer

Tap water filtered to 0.2 microns or sterile water

Answer

AAMI ST91 recommends sterile water or water filtered through a 0.2-micron filter for the final rinse to prevent recontamination of the scope.

Question 3

Which of the following conditions would require discarding an HLD solution before its labeled reuse date?

Accepted Answer

The MRC test strip indicates concentration is below the minimum

Answer

If the MRC test indicates the solution has fallen below minimum required concentration, it must be discarded immediately regardless of the reuse date.

Question 4

A gastroscope used on a patient with active tuberculosis requires which level of reprocessing?

Accepted Answer

High-level disinfection following standard reprocessing protocol

Answer

Mycobacterium tuberculosis is susceptible to high-level disinfectants, so standard HLD reprocessing protocol is appropriate and sufficient for this organism.

Question 5

What is the recommended approach when an endoscope cannot be reprocessed immediately after patient use?

Accepted Answer

Perform pre-cleaning immediately and place it in enzymatic solution or dry transport

Answer

Pre-cleaning at point of use followed by transport in enzymatic solution or dry transport to the reprocessing area prevents biofilm formation and protects staff.

CER - Certified Endoscope Reprocessor Practice Test

CER - Certified Endoscope Reprocessor Practice Test

CER High-Level Disinfection Processes 4