CER Endoscope Sterilization Methods Questions and Answers 2

Question 1

Which low-temperature sterilization method uses hydrogen peroxide gas plasma?

Accepted Answer

STERRAD system (hydrogen peroxide gas plasma)

Answer

The STERRAD system (Advanced Sterilization Products) uses hydrogen peroxide gas plasma to sterilize heat-sensitive instruments including some endoscopes.

Question 2

Why is steam sterilization (autoclaving) generally NOT used for flexible endoscopes?

Accepted Answer

The high heat and moisture of autoclaving damages the flexible materials and adhesives in endoscopes

Answer

Flexible endoscopes contain heat-sensitive polymers, adhesives, and electronic components that are destroyed by the high temperature and moisture of steam sterilization.

Question 3

What is the Spaulding classification for flexible endoscopes that enter sterile body cavities (e.g., during ERCP)?

Accepted Answer

Critical — requires sterilization

Answer

Instruments that enter sterile body cavities or the vascular system are classified as critical and require sterilization per the Spaulding classification.

Question 4

What is a key limitation of ethylene oxide (ETO) sterilization for flexible endoscopes?

Accepted Answer

ETO requires long aeration times (12–24 hours) to remove toxic residues before use

Answer

ETO is effective but requires prolonged aeration to remove toxic residual gas from materials before the endoscope can safely be used.

Question 5

Peracetic acid immersion sterilization (e.g., SYSTEM 1E/EVOTECH) achieves sterilization at what temperature range?

Accepted Answer

Approximately 50–56°C

Answer

Peracetic acid sterilization systems operate at approximately 50–56°C, making them compatible with heat-sensitive endoscopes.

CER - Certified Endoscope Reprocessor Practice Test

CER - Certified Endoscope Reprocessor Practice Test

CER Endoscope Sterilization Methods Questions and Answers 2