CBIC CBIC Sterilization and Disinfection

Question 1

Which level of disinfection is required for semi-critical medical devices that contact mucous membranes but do not penetrate sterile tissue?

Accepted Answer

High-level disinfection

Answer

Semi-critical devices require high-level disinfection to eliminate all microorganisms except high numbers of bacterial spores.

Question 2

According to the Spaulding classification, which category includes items that enter sterile tissue or the vascular system?

Accepted Answer

Critical

Answer

Critical items penetrate sterile body sites and must undergo sterilization to eliminate all forms of microbial life.

Question 3

What is the minimum exposure time for steam sterilization (gravity cycle) at 250°F (121°C) for wrapped instruments?

Accepted Answer

30 minutes

Answer

A gravity displacement steam cycle at 121°C requires a minimum 30-minute exposure time for wrapped items.

Question 4

Which chemical indicator type confirms that a sterilization process has achieved the required parameters (time, temperature, and steam)?

Accepted Answer

Class 5 integrating indicator

Answer

Class 5 integrating indicators respond to all critical sterilization variables and correlate to the performance of a biological indicator.

Question 5

Which of the following is the most reliable method to verify sterilization efficacy?

Accepted Answer

Biological indicator using Geobacillus stearothermophilus

Answer

Biological indicators using Geobacillus stearothermophilus spores are the gold standard for verifying steam sterilization efficacy.

CBIC - Certification Board of Infection Control Practice Test