CRCST CRCST Microbiology and Infection Control 2

Question 1

What does 'bioburden' mean in the context of instrument reprocessing?

Accepted Answer

The total number of microorganisms present on an item before sterilization

Answer

Bioburden refers to the number of viable microorganisms contaminating an item prior to sterilization; lower bioburden improves sterilization efficacy.

Question 2

What type of precautions are used for ALL patients regardless of diagnosis in healthcare settings?

Accepted Answer

Standard precautions

Answer

Standard precautions are applied to all patients and include hand hygiene, PPE use, and safe handling of sharps to prevent transmission of bloodborne and other pathogens.

Question 3

Which bloodborne pathogen is of the GREATEST concern for CS technicians handling contaminated sharps?

Accepted Answer

Hepatitis B virus (HBV)

Answer

Hepatitis B virus is highly contagious via needlestick and sharps injuries and poses the greatest occupational bloodborne pathogen risk for CS technicians.

Question 4

What does 'high-level disinfection' (HLD) achieve that 'intermediate-level disinfection' does NOT?

Accepted Answer

Destruction of all microorganisms except large numbers of bacterial spores

Answer

High-level disinfection eliminates all microorganisms except high numbers of bacterial spores and is required for semi-critical items like flexible endoscopes.

Question 5

Why is thorough mechanical cleaning considered the most important step in the reprocessing cycle?

Accepted Answer

It removes organic material that would shield microorganisms from disinfectants and sterilants

Answer

Organic debris such as blood and tissue can shield microorganisms from the lethal action of disinfectants and sterilants, making cleaning the critical first step.

(CRCST) Certified Registered Central Service Technician Exam Practice Test

(CRCST) Certified Registered Central Service Technician Exam Practice Test

CRCST CRCST Microbiology and Infection Control 2