High-Level Disinfection Processes Flashcards

What is the minimum recommended contact time for 2% glutaraldehyde to achieve high-level disinfection at 20°C (68°F)?

Answer: 20 minutes

2% glutaraldehyde requires at least 20 minutes of contact time at 20°C to achieve high-level disinfection per most manufacturer guidelines.

Which of the following best describes the term 'soak time' in high-level disinfection?

Answer: The duration the endoscope is submerged in the HLD solution

Soak time refers to the period the endoscope remains fully submerged and in contact with the HLD solution to destroy pathogens.

A technician notices that the HLD solution appears cloudy and discolored. What is the correct action?

Answer: Discard the solution and replace with fresh HLD

Visibly cloudy or discolored HLD solution should be discarded immediately, as organic contamination can render it ineffective regardless of MRC test results.

Which microorganism category is most resistant to high-level disinfectants and requires sterilization rather than HLD?

Answer: Bacterial endospores

Bacterial endospores are the most resistant form of microbial life and require sterilization; HLD may not reliably eliminate all spores.

What does MRC stand for in the context of HLD chemical testing?

Answer: Minimum Required Concentration

MRC stands for Minimum Required Concentration, which is the lowest effective concentration of HLD solution as determined by the manufacturer.

How often must HLD solution concentration be tested when used in a manual soaking basin?

Answer: Before each use or per manufacturer instructions

HLD solution must be tested before each use or according to manufacturer instructions to confirm it remains above the minimum required concentration.

Which of the following is NOT a factor that can reduce the efficacy of a high-level disinfectant?

Answer: Using a covered container during soak

Using a covered container actually helps maintain concentration and temperature; it does not reduce HLD efficacy.