CER Principles and Maintenance Questions and Answers 3 — Questions and Answers
Question 1: What is the primary purpose of performing a leak test on a flexible endoscope before reprocessing?
- To check for channel blockages
- To detect damage to the sheath or internal channels that could allow fluid ingress (Correct answer)
- To verify the light source connection is functioning
- To measure the scope's working length
Correct answer: To detect damage to the sheath or internal channels that could allow fluid ingress
Leak testing detects damage to the endoscope's sheath or channels that could allow reprocessing fluids to penetrate and cause irreparable internal damage.
Question 2: Which type of brush is recommended for cleaning endoscope channels?
- Any stiff-bristled brush that fits the channel diameter
- A manufacturer-validated, single-use brush sized to the specific channel diameter (Correct answer)
- A reusable metal-bristled brush sterilized between uses
- A soft cloth wrapped around a flexible rod
Correct answer: A manufacturer-validated, single-use brush sized to the specific channel diameter
Single-use, manufacturer-validated brushes of the correct diameter ensure effective cleaning without damaging channel walls or causing cross-contamination.
Question 3: What does 'functional testing' of an endoscope following reprocessing include?
- Only verifying the light source illuminates
- Checking controls, channels, optics, and angulation to confirm readiness for use (Correct answer)
- Measuring the scope's length and outer diameter
- Testing only the suction channel for patency
Correct answer: Checking controls, channels, optics, and angulation to confirm readiness for use
Functional testing verifies all mechanical and optical components work properly before returning the scope to clinical use.
Question 4: When should a flexible endoscope undergo preventive maintenance by a qualified repair technician?
- Only when a visible defect is apparent to the user
- According to the manufacturer's recommended schedule and after any suspected damage (Correct answer)
- Once every five years regardless of use frequency
- Only after a documented patient complaint is received
Correct answer: According to the manufacturer's recommended schedule and after any suspected damage
Scheduled preventive maintenance and post-incident inspections ensure optimal performance and early detection of defects before patient harm occurs.
Question 5: What is the correct action if an endoscope fails a leak test?
- Proceed with reprocessing using lower immersion pressure
- Remove from service, label as defective, and send for repair before any further patient use (Correct answer)
- Dry the scope thoroughly and repeat the leak test immediately
- Increase immersion time in the high-level disinfectant
Correct answer: Remove from service, label as defective, and send for repair before any further patient use
A failed leak test indicates a compromised scope that must be removed from service immediately to prevent patient harm and further internal damage.
Question 6: What is the minimum required action after every endoscope procedure before transport to the reprocessing area?
- Full high-level disinfection at the bedside
- Point-of-use cleaning including wiping the exterior and flushing channels with enzymatic solution (Correct answer)
- Dry wiping only of the insertion tube
- Immediate immersion in sterile water at the bedside
Correct answer: Point-of-use cleaning including wiping the exterior and flushing channels with enzymatic solution
Point-of-use cleaning removes gross soil immediately after use, preventing biofilm formation and facilitating subsequent reprocessing steps.
Question 7: Which factor most significantly impacts the efficacy of high-level disinfection (HLD)?
- The color and material composition of the endoscope sheath
- Adequate manual cleaning performed prior to HLD (Correct answer)
- The ambient temperature of the reprocessing storage cabinet
- The brand of the endoscope manufacturer
Correct answer: Adequate manual cleaning performed prior to HLD
Thorough manual cleaning before HLD is critical because residual organic material shields microorganisms from disinfectant action.
CER Principles and Maintenance Questions and Answers 3
What is the primary purpose of performing a leak test on a flexible endoscope before reprocessing?