CER Principles and Maintenance Questions and Answers 4 — Questions and Answers
Question 1: What information must be documented for each endoscope reprocessing cycle?
- Only the patient's name and procedure date
- Scope ID, operator ID, date/time, disinfectant lot number, concentration test result, and cycle parameters (Correct answer)
- Only the type and brand of disinfectant used
- The patient's diagnosis and attending physician's name only
Correct answer: Scope ID, operator ID, date/time, disinfectant lot number, concentration test result, and cycle parameters
Complete documentation creates a traceable record supporting quality assurance, infection control investigations, and regulatory compliance.
Question 2: How should a flexible endoscope be stored after successful reprocessing?
- Coiled tightly and sealed in a plastic bag to prevent contamination
- Hung vertically in a ventilated, dedicated storage cabinet with all port caps removed (Correct answer)
- Submerged in sterile water until the next scheduled use
- Wrapped in sterile drapes and placed horizontally on a shelf
Correct answer: Hung vertically in a ventilated, dedicated storage cabinet with all port caps removed
Vertical hanging in a ventilated cabinet prevents moisture accumulation in channels and secondary contamination between clinical uses.
Question 3: Which US regulatory body is responsible for registering high-level disinfectants used in endoscope reprocessing?
- The Joint Commission (TJC)
- The Environmental Protection Agency (EPA) (Correct answer)
- The Centers for Medicare and Medicaid Services (CMS)
- The American Society of Gastrointestinal Endoscopy (ASGE)
Correct answer: The Environmental Protection Agency (EPA)
The EPA registers high-level disinfectants and sterilants used on medical devices in the United States under its pesticide regulatory authority.
Question 4: What does MRC stand for in the context of endoscope reprocessing chemicals?
- Maximum Reuse Concentration
- Minimum Recommended Concentration (Correct answer)
- Measured Reprocessing Cycle
- Manufacturer's Required Criteria
Correct answer: Minimum Recommended Concentration
MRC (Minimum Recommended Concentration) is the lowest disinfectant concentration that must be maintained to reliably achieve high-level disinfection.
Question 5: What is the primary role of an Automated Endoscope Reprocessor (AER)?
- To completely replace all manual cleaning steps in the reprocessing cycle
- To perform automated high-level disinfection and rinsing after thorough manual cleaning (Correct answer)
- To sterilize endoscopes using steam or ethylene oxide
- To conduct leak testing automatically before each cycle
Correct answer: To perform automated high-level disinfection and rinsing after thorough manual cleaning
AERs automate the HLD and rinsing phases but cannot replace the critical manual pre-cleaning step that must precede every cycle.
Question 6: Which endoscope accessory must always be single-use and never reprocessed for reuse?
- Biopsy forceps used only for observation without tissue retrieval
- Any accessory labeled 'single-use only' (SUO) per FDA guidance (Correct answer)
- Light guide cables after cleaning with enzymatic solution
- Water bottles after autoclaving at the correct temperature
Correct answer: Any accessory labeled 'single-use only' (SUO) per FDA guidance
FDA guidance requires that items labeled single-use only must not be reprocessed or reused, as safety and efficacy after reprocessing cannot be assured.
Question 7: What is the recommended approach to determining an endoscope's maximum hang time before re-reprocessing is required?
- Apply a universal 24-hour standard regardless of storage conditions
- Base hang time on facility-validated, evidence-based policy, often 5–7 days in a proper cabinet (Correct answer)
- Assume indefinite storage is acceptable as long as the cabinet door stays closed
- Use a 30-day maximum applicable to all endoscope types uniformly
Correct answer: Base hang time on facility-validated, evidence-based policy, often 5–7 days in a proper cabinet
Hang time is facility- and evidence-based; most guidelines support 5–7 days in a compliant cabinet, but each facility must validate its own policy.
CER Principles and Maintenance Questions and Answers 4
What information must be documented for each endoscope reprocessing cycle?