Decontamination Processes and Equipment Flashcards
7 cards from real MDRAO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Decontamination Processes and Equipment flashcards as text
Which type of washer-disinfector cycle uses a thermal disinfection phase to achieve an A0 value of at least 600?
Answer: Thermal disinfection cycle
A thermal disinfection cycle achieves an A0 value of at least 600, indicating sufficient lethal heat exposure to disinfect instruments.
What is the primary purpose of the enzymatic pre-soak step in instrument decontamination?
Answer: To break down protein-based bioburden for easier removal
Enzymatic pre-soaks break down proteins, fats, and carbohydrates in bioburden, making them easier to remove during the wash cycle.
A technician notices white mineral deposits on instruments after automated washing. What is the most likely cause?
Answer: Hard water or insufficient final rinse temperature
Hard water contains calcium and magnesium salts that precipitate as white deposits, especially if the final rinse does not use softened or purified water.
When loading a washer-disinfector, instruments with box locks should be positioned in what manner?
Answer: Open to allow water and detergent to reach all surfaces
Box locks must be open during washing so water and detergent can penetrate the joint and remove bioburden from all surfaces.
Which chemical agent is most appropriate for high-level disinfection of heat-sensitive flexible endoscopes?
Answer: Glutaraldehyde 2% or OPA 0.55%
Glutaraldehyde 2% and OPA 0.55% are approved high-level disinfectants for heat-sensitive scopes, achieving elimination of all microorganisms except high numbers of spores.
What does the term 'cavitation' refer to in the context of ultrasonic cleaning?
Answer: The formation and implosion of microscopic bubbles that dislodge soil
Cavitation is the rapid formation and violent collapse of microscopic bubbles created by high-frequency sound waves, which mechanically dislodge soil from instrument surfaces.
Which personal protective equipment (PPE) is mandatory when working in the decontamination area handling contaminated instruments?
Answer: Impermeable gown, utility gloves, face shield, and closed-toe shoes
The decontamination area requires an impermeable gown, heavy-duty utility gloves, face shield or goggles, and closed-toe/slip-resistant shoes to protect against splashes and sharps.