CER Decontamination and Manual Cleaning Questions and Answers 3 — Questions and Answers
Question 1: What is the maximum water temperature recommended during manual cleaning of flexible endoscopes to prevent protein coagulation?
- Cold water only (below 10°C)
- Lukewarm water (up to 35°C) (Correct answer)
- Warm water (up to 45°C)
- Hot water (up to 60°C)
Correct answer: Lukewarm water (up to 35°C)
Lukewarm water up to 35°C is recommended because hot water can coagulate proteins, making bioburden harder to remove.
Question 2: Which component of an endoscope requires special attention during leak testing before manual cleaning?
- The light guide connector
- The insertion tube and bending section (Correct answer)
- The control body handle grips
- The eyepiece lens
Correct answer: The insertion tube and bending section
The insertion tube and bending section are most vulnerable to perforations and must be carefully inspected during leak testing before immersion.
Question 3: A technician notices the enzymatic detergent solution has turned cloudy and dark after cleaning several scopes. What should they do?
- Add more detergent concentrate to refresh the solution
- Continue using it until the shift ends to avoid waste
- Discard the solution immediately and prepare a fresh batch (Correct answer)
- Filter the solution through gauze to remove debris
Correct answer: Discard the solution immediately and prepare a fresh batch
Visibly soiled or exhausted detergent solutions must be discarded immediately because they can no longer effectively break down bioburden.
Question 4: When performing channel brushing during manual cleaning, how many passes should the brush make through each channel?
- One pass is sufficient if bristles contact all surfaces
- Until the brush exits clean with no visible debris (Correct answer)
- Exactly three passes regardless of soiling level
- Two passes in each direction (four total)
Correct answer: Until the brush exits clean with no visible debris
Brushing should continue until the brush exits visibly clean, as the number of passes needed varies with the degree of soiling.
Question 5: What is the primary purpose of the pre-cleaning step performed at the point of use immediately after a procedure?
- To fully disinfect the endoscope before transport
- To remove gross soil before bioburden can dry and adhere (Correct answer)
- To sterilize the biopsy channel for immediate reuse
- To perform a functional check of all working channels
Correct answer: To remove gross soil before bioburden can dry and adhere
Point-of-use pre-cleaning prevents blood and secretions from drying on surfaces, which would make subsequent manual cleaning far more difficult.
Question 6: Which personal protective equipment (PPE) is LEAST appropriate when manually cleaning endoscopes in a soiled utility area?
- Fluid-resistant gown
- Standard examination gloves only (Correct answer)
- Full face shield or goggles
- Heavy-duty puncture-resistant gloves
Correct answer: Standard examination gloves only
Standard examination gloves alone are inadequate because they are too thin and provide insufficient protection from punctures and chemical exposures during manual cleaning.
Question 7: After manual cleaning, how should the interior channels of an endoscope be dried before high-level disinfection in an AER?
- Leave wet — the AER cycle will handle drying internally
- Blow compressed air through all channels to remove moisture (Correct answer)
- Use a sterile cotton swab to absorb moisture from each port
- Flush with 70% isopropyl alcohol then purge with air
Correct answer: Blow compressed air through all channels to remove moisture
Compressed air is used to purge water from channels after rinsing, as residual water can dilute the high-level disinfectant and reduce its efficacy.
CER Decontamination and Manual Cleaning Questions and Answers 3
What is the maximum water temperature recommended during manual cleaning of flexible endoscopes to prevent protein coagulation?