CABT Sterilization and Infection Control

Question 1

What is the most widely used sterilization method for heat-stable medical instruments in healthcare facilities?

Accepted Answer

Steam autoclave (moist heat sterilization)

Answer

Steam autoclave (moist heat) is the most widely used sterilization method because it is effective, fast, non-toxic, and economical for heat-stable instruments.

Question 2

What temperature and pressure are maintained during a standard gravity displacement steam sterilization cycle?

Accepted Answer

121°C (250°F) at 15 psi

Answer

Standard gravity displacement steam sterilization is conducted at 121°C (250°F) at 15 psi for the required exposure time to ensure microbial kill.

Question 3

According to the Spaulding Classification System, surgical instruments that enter sterile tissue or the vascular system are classified as:

Accepted Answer

Critical items

Answer

Critical items contact sterile tissue or the vascular system and must be sterilized to prevent the highest risk of infection transmission.

Question 4

Ethylene oxide (EtO) sterilization is best suited for which type of medical equipment?

Accepted Answer

Heat and moisture-sensitive devices that cannot withstand steam

Answer

EtO sterilizes at low temperatures without moisture, making it ideal for heat and moisture-sensitive devices such as plastics and electronics.

Question 5

Which biological indicator organism is the standard for testing the efficacy of steam sterilization?

Accepted Answer

Geobacillus stearothermophilus spores

Answer

Geobacillus stearothermophilus spores are highly resistant to moist heat and are the accepted standard biological indicator for steam sterilization monitoring.

(CABT) Certified Associate in Biomedical Technology Practice Test

(CABT) Certified Associate in Biomedical Technology Practice Test

CABT Sterilization and Infection Control