CER Automated Endoscope Reprocessors 2 — Questions and Answers
Question 1: What is the term for the process of verifying that an AER consistently achieves the required log reduction of test organisms?
- Calibration
- Validation (Correct answer)
- Qualification
- Certification
Correct answer: Validation
Validation is the documented process confirming that an AER cycle reliably delivers the intended level of microbial kill under defined conditions.
Question 2: Which scenario would require immediate removal of an AER from service?
- The cycle time is 2 minutes longer than usual
- Disinfectant concentration is confirmed below the minimum effective concentration (MEC) (Correct answer)
- The rinse water temperature is 1°C below the set point
- The door seal shows minor surface discoloration
Correct answer: Disinfectant concentration is confirmed below the minimum effective concentration (MEC)
Disinfectant below the MEC cannot achieve high-level disinfection, making the machine unsafe to use until the solution is replaced and the MEC is re-confirmed.
Question 3: What is the purpose of running a daily function test or cycle check on an AER?
- To clean the AER's interior surfaces
- To confirm the machine's mechanical and chemical parameters are within specifications before patient care use (Correct answer)
- To sterilize the AER water lines
- To log the number of cycles completed for billing purposes
Correct answer: To confirm the machine's mechanical and chemical parameters are within specifications before patient care use
Daily function tests verify that AER parameters such as temperature, exposure time, and chemical concentration meet specifications before scopes used on patients are processed.
Question 4: Which microorganism is most associated with outbreaks linked to inadequate AER water quality?
- Staphylococcus aureus
- Clostridium difficile
- Pseudomonas aeruginosa (Correct answer)
- Mycobacterium tuberculosis
Correct answer: Pseudomonas aeruginosa
Pseudomonas aeruginosa is a waterborne organism that can colonize AER water systems and recontaminate scopes during the rinse phase if water quality is inadequate.
Question 5: How should AER channel adapters and connectors be maintained between uses?
- Stored dry after being cleaned and disinfected per the AER manufacturer's IFU (Correct answer)
- Rinsed with tap water and air-dried on the countertop
- Soaked in high-level disinfectant continuously between uses
- Replaced after every 10 cycles to prevent biofilm buildup
Correct answer: Stored dry after being cleaned and disinfected per the AER manufacturer's IFU
Connectors must be cleaned, disinfected, and stored dry between uses as specified by the AER manufacturer to prevent biofilm formation and cross-contamination.
Question 6: What does MRC stand for in the context of AER chemical management?
- Minimum Reprocessing Concentration
- Maximum Recommended Cycle
- Minimum Required Concentration (Correct answer)
- Manufacturer's Recommended Chemical
Correct answer: Minimum Required Concentration
MRC (Minimum Required Concentration) is the lowest disinfectant concentration that the AER system requires to function; it differs from MEC, which is the chemical's own germicidal threshold.
Question 7: An AER manufacturer states the disinfectant may be reused for a maximum of 14 days. On day 10, an MEC test strip shows the solution is below MEC. What should be done?
- Continue using the solution since it has 4 days remaining in its use-life
- Discard the solution immediately and recharge the AER with fresh disinfectant (Correct answer)
- Add a small amount of concentrate to bring it back above MEC
- Run a longer AER cycle to compensate for reduced concentration
Correct answer: Discard the solution immediately and recharge the AER with fresh disinfectant
When a solution tests below MEC, it must be discarded regardless of the reuse date because germicidal efficacy can no longer be guaranteed.
CER Automated Endoscope Reprocessors 2
What is the term for the process of verifying that an AER consistently achieves the required log reduction of test organisms?