IAHCSMM Flexible Endoscope Reprocessing 3 — Questions and Answers
Question 1: What is the minimum contact time required for most glutaraldehyde-based high-level disinfectants at 20°C (68°F) to achieve HLD of flexible endoscopes?
- 5 minutes
- 10 minutes
- 20 minutes (Correct answer)
- 45 minutes
Correct answer: 20 minutes
Most 2% glutaraldehyde formulations require a minimum 20-minute contact time at 20°C to achieve high-level disinfection of endoscopes.
Question 2: Which pathogen has been most commonly associated with endoscopy-related outbreaks due to inadequate reprocessing of duodenoscopes?
- Clostridioides difficile
- Carbapenem-resistant Enterobacteriaceae (CRE) (Correct answer)
- Methicillin-resistant Staphylococcus aureus (MRSA)
- Pseudomonas aeruginosa
Correct answer: Carbapenem-resistant Enterobacteriaceae (CRE)
CRE outbreaks have been linked to inadequate reprocessing of duodenoscopes, particularly due to the complex elevator mechanism that is difficult to clean.
Question 3: What is the purpose of performing a minimum effective concentration (MEC) test on a high-level disinfectant?
- To verify the temperature of the disinfectant solution
- To confirm the disinfectant still meets the minimum required concentration for HLD (Correct answer)
- To test the pH of the disinfectant before use
- To check for expired chemical test strips
Correct answer: To confirm the disinfectant still meets the minimum required concentration for HLD
MEC testing confirms that repeated use has not diluted the HLD solution below the minimum concentration required to achieve high-level disinfection.
Question 4: Which endoscope component is unique to duodenoscopes and poses the greatest reprocessing challenge?
- Biopsy channel valve
- Distal tip elevator mechanism (Correct answer)
- Air/water nozzle
- Suction valve port
Correct answer: Distal tip elevator mechanism
The elevator mechanism at the distal tip of duodenoscopes creates hard-to-reach crevices that standard brushing cannot fully access, making it a high-risk area for contamination.
Question 5: An automated endoscope reprocessor (AER) should NOT replace which critical manual step?
- High-level disinfection
- Rinsing
- Manual cleaning prior to AER processing (Correct answer)
- Drying
Correct answer: Manual cleaning prior to AER processing
Manual cleaning must always precede AER processing because AERs cannot remove gross soil — they are designed to disinfect already-cleaned scopes.
Question 6: According to SGNA guidelines, how soon must pre-cleaning of a flexible endoscope begin after a procedure?
- Within 30 minutes
- Immediately at the point of use before the scope leaves the procedure room (Correct answer)
- Within 1 hour
- Before the end of the workday
Correct answer: Immediately at the point of use before the scope leaves the procedure room
Pre-cleaning must begin immediately at the point of use before organic material dries on and within the scope, which would make subsequent cleaning significantly more difficult.
Question 7: Which level of disinfection is required for flexible endoscopes that contact mucous membranes but do not penetrate sterile tissue?
- Low-level disinfection
- Intermediate-level disinfection
- High-level disinfection (Correct answer)
- Sterilization
Correct answer: High-level disinfection
Semi-critical items such as flexible endoscopes that contact mucous membranes require high-level disinfection per the Spaulding classification.
IAHCSMM Flexible Endoscope Reprocessing 3
What is the minimum contact time required for most glutaraldehyde-based high-level disinfectants at 20°C (68°F) to achieve HLD of flexible endoscopes?