Instrument Processing, Sterilization, and Monitoring Flashcards
6 cards from real RDA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Instrument Processing, Sterilization, and Monitoring flashcards as text
What is the correct temperature and time for a gravity displacement steam autoclave to achieve sterilization of unwrapped instruments?
Answer: 250°F (121°C) for 15–30 minutes
Gravity displacement steam autoclaves sterilize at 250°F (121°C) for 15–30 minutes (depending on load type). Pre-vacuum autoclaves operate at 270°F (132°C) for shorter cycles.
Which biological indicator is used to verify steam autoclave sterilization efficacy?
Answer: Geobacillus stearothermophilus spore strips
Geobacillus stearothermophilus (formerly Bacillus stearothermophilus) spore strips are the biological indicator for steam autoclave validation, as these spores are highly resistant to moist heat.
What is the purpose of a chemical indicator (CI) placed inside instrument packaging before sterilization?
Answer: To indicate that the package was exposed to sterilization conditions (heat, pressure, or chemical)
Chemical indicators (Type 1–6) change color or form when exposed to sterilization conditions, indicating that the package was processed. They do NOT confirm that sterilization was achieved.
Which classification of instruments requires sterilization because they penetrate soft tissue or bone?
Answer: Critical instruments
Critical instruments (e.g., forceps, elevators, scalers, burs, needles) penetrate soft tissue or bone and must be sterilized (not just disinfected) because they have the highest risk for transmitting infection.
What is the correct first step in instrument reprocessing after use?
Answer: Transport to the sterilization area in a covered container
The first step is safely transporting used instruments in a covered, puncture-resistant container to the sterilization area to prevent occupational exposure during transport.
How often should spore testing (biological monitoring) of sterilizers be performed in a dental office?
Answer: Weekly
The CDC and OSAP recommend that dental offices perform spore testing at least weekly to verify sterilizer performance, as well as after any sterilizer repair or malfunction.