CER Endoscope Repair and Maintenance 3 — Questions and Answers
Question 1: Which endoscope repair should NEVER be attempted by reprocessing staff and must be sent to a qualified repair center?
- Replacing a biopsy port cap
- Repairing a torn insertion tube sheath (Correct answer)
- Cleaning external surfaces
- Replacing a water-resistant cap
Correct answer: Repairing a torn insertion tube sheath
Insertion tube sheath repairs require specialized tools and expertise; improper repair can compromise the leak-tight integrity of the endoscope.
Question 2: A videoscope produces a blurry image despite cleaning the distal lens. What should be checked next?
- The light source bulb intensity
- The CCD or CMOS image sensor for damage (Correct answer)
- The air/water channel patency
- The angulation brake tension
Correct answer: The CCD or CMOS image sensor for damage
If lens cleaning does not resolve blurry imaging, the image sensor (CCD/CMOS) may be damaged and requires professional evaluation.
Question 3: Why is it important to keep endoscope repair logs separate from reprocessing logs?
- Repair logs are not required by regulatory standards
- They serve different traceability and quality improvement purposes (Correct answer)
- Reprocessing logs are only needed for patient records
- Repair logs are maintained only by manufacturers
Correct answer: They serve different traceability and quality improvement purposes
Repair logs track maintenance history and recurring damage patterns, while reprocessing logs document infection control compliance — each serves a distinct quality and safety function.
Question 4: What effect does repeated pinching of the insertion tube have on long-term endoscope function?
- Improves angulation responsiveness
- Causes internal channel collapse and wire damage (Correct answer)
- Strengthens the outer sheath
- Has no effect if the scope passes leak testing
Correct answer: Causes internal channel collapse and wire damage
Repeated pinching compresses the insertion tube, potentially collapsing internal channels and stressing or breaking angulation wires over time.
Question 5: During visual inspection before reprocessing, a reprocessor finds a small nick in the insertion tube. The correct action is to:
- Cover it with waterproof tape and proceed
- Remove the scope from service and send for repair (Correct answer)
- Only flag it if the scope fails leak testing
- Clean the area with alcohol and document it
Correct answer: Remove the scope from service and send for repair
Any visible damage to the insertion tube sheath warrants immediate removal from service, as it compromises the protective barrier against fluid ingress.
Question 6: What is the MOST common cause of air/water channel blockage in flexible endoscopes?
- Mineral deposits from hard water
- Residual biological material not removed during manual cleaning (Correct answer)
- Enzymatic detergent residue
- Disinfectant crystallization
Correct answer: Residual biological material not removed during manual cleaning
Inadequate manual cleaning leaves residual biological material (protein, mucus) that dries and blocks narrow channels over time.
Question 7: How should endoscopes be stored to prevent damage to the angulation wires?
- Coiled tightly in a storage case
- Hanging vertically with controls in the neutral/relaxed position (Correct answer)
- Stored horizontally with the tip deflected upward
- With angulation locks engaged at maximum deflection
Correct answer: Hanging vertically with controls in the neutral/relaxed position
Vertical hanging with controls in the neutral position prevents prolonged tension or kinking of angulation wires during storage.
CER Endoscope Repair and Maintenance 3
Which endoscope repair should NEVER be attempted by reprocessing staff and must be sent to a qualified repair center?