CER Work Area Design & Workflow Questions and Answers 3 — Questions and Answers
Question 1: Which AAMI standard provides primary guidance on the design and layout of endoscope reprocessing areas?
- AAMI ST91 (Correct answer)
- AAMI ST79
- AAMI ST58
- AAMI TIR34
Correct answer: AAMI ST91
AAMI ST91 is the primary standard addressing flexible endoscope reprocessing, including facility design requirements.
Question 2: What is the recommended minimum number of sinks in the decontamination area of an endoscope reprocessing room?
- One deep sink
- Two sinks — one for washing, one for rinsing (Correct answer)
- Three sinks
- Sinks are optional if AERs are used
Correct answer: Two sinks — one for washing, one for rinsing
At minimum, two separate sinks should be available — one dedicated to washing and one to rinsing — to prevent cross-contamination.
Question 3: Why is a hands-free (foot-pedal or sensor-operated) faucet preferred in the decontamination sink area?
- It saves water compared to standard faucets
- It prevents recontamination of cleaned hands during rinsing (Correct answer)
- It is required by OSHA for all clinical sinks
- It provides higher water pressure for lumen flushing
Correct answer: It prevents recontamination of cleaned hands during rinsing
Hands-free faucets prevent technicians from recontaminating their hands or the scope by touching a potentially soiled handle after cleaning.
Question 4: The 'clean-to-dirty' workflow principle in endoscope reprocessing means that:
- Clean scopes are stored near the dirty utility room for efficiency
- Personnel and scopes should move from decontamination toward clean/storage areas, never in reverse (Correct answer)
- Dirty scopes may pass through the clean storage area if covered
- Clean and dirty scopes can share the same transport cart when separated by time
Correct answer: Personnel and scopes should move from decontamination toward clean/storage areas, never in reverse
Unidirectional clean-to-dirty workflow prevents contaminated items from re-entering clean zones and causing cross-contamination.
Question 5: What is the purpose of a pass-through window between the decontamination area and the clean processing area?
- It allows staff to communicate without leaving their zones
- It enables scopes to move from dirty to clean sides without personnel crossing zones (Correct answer)
- It is used solely for documentation exchange between technicians
- It provides additional ventilation between the two zones
Correct answer: It enables scopes to move from dirty to clean sides without personnel crossing zones
Pass-through windows allow scopes to be transferred from decontamination to the clean side without staff or scopes crossing contamination boundaries.
Question 6: Which ventilation parameter is most critical to maintain in the decontamination area to protect staff from chemical vapors?
- Positive air pressure relative to adjacent areas
- Negative air pressure relative to adjacent areas (Correct answer)
- Neutral air pressure with ceiling-mounted HEPA filters
- Recirculated air at 20 air changes per hour
Correct answer: Negative air pressure relative to adjacent areas
Negative air pressure in the decontamination area contains chemical vapors and biological aerosols, preventing them from migrating to clean zones.
Question 7: How should soiled endoscopes be transported from the procedure room to the reprocessing area?
- Carried by hand without a container if the distance is short
- In a sealed, leak-proof container or covered transport cart (Correct answer)
- Submerged in enzymatic solution in an open basin on a cart
- Rinsed at point of use and then transported uncovered
Correct answer: In a sealed, leak-proof container or covered transport cart
Soiled scopes must be transported in sealed, leak-proof, labeled containers to protect staff and the environment from contamination.
CER Work Area Design & Workflow Questions and Answers 3
Which AAMI standard provides primary guidance on the design and layout of endoscope reprocessing areas?