CER Endoscope Sterilization Methods Questions and Answers 3

Question 1

What is the primary advantage of hydrogen peroxide gas plasma sterilization over ETO for endoscope reprocessing?

Accepted Answer

No toxic residuals requiring aeration after the cycle

Answer

Hydrogen peroxide gas plasma sterilization leaves no toxic residuals, eliminating the lengthy aeration period required after ETO sterilization.

Question 2

Which sterilization method requires a mandatory aeration period after the cycle to remove toxic residuals before instruments can be used on patients?

Accepted Answer

Ethylene oxide (ETO)

Answer

ETO sterilization requires a post-cycle aeration period because ETO and its byproducts (ethylene chlorohydrin, ethylene glycol) are toxic and must off-gas from materials before patient contact.

Question 3

What is the primary mechanism by which ethylene oxide (ETO) achieves sterilization of microorganisms?

Accepted Answer

Alkylation of DNA, RNA, and proteins disrupting cellular function

Answer

ETO sterilizes by alkylating the nucleic acids and proteins of microorganisms, which prevents cellular replication and kills all forms of microbial life.

Question 4

The STERRAD sterilization system manufactured by ASP uses which sterilant as its primary active agent?

Accepted Answer

Hydrogen peroxide gas plasma

Answer

The STERRAD system uses vaporized hydrogen peroxide combined with low-temperature plasma to achieve sterilization of heat- and moisture-sensitive instruments.

Question 5

What is the typical temperature range used during an ethylene oxide (ETO) sterilization cycle?

Accepted Answer

37–55°C (98–131°F)

Answer

ETO sterilization operates at low temperatures (37–55°C), making it suitable for heat-sensitive endoscopes that cannot withstand steam autoclave temperatures.

CER - Certified Endoscope Reprocessor Practice Test

CER - Certified Endoscope Reprocessor Practice Test

CER Endoscope Sterilization Methods Questions and Answers 3