RDA Instrument Processing, Sterilization, and Monitoring 4

Question 1

Which type of biological indicator contains spores of Geobacillus stearothermophilus and is used to monitor steam autoclaves?

Accepted Answer

Geobacillus stearothermophilus ampule

Answer

Geobacillus stearothermophilus spores are the standard biological indicator for steam sterilization because they are highly resistant to moist heat.

Question 2

A dental assistant notices the sterilization pouch seal has partially opened after the cycle. What is the correct action?

Accepted Answer

Repackage and re-sterilize the instruments

Answer

A compromised seal means sterility cannot be guaranteed, so instruments must be repackaged and run through another sterilization cycle.

Question 3

What is the purpose of the 'decontamination zone' in instrument reprocessing?

Accepted Answer

Receiving and cleaning contaminated instruments to make them safe to handle

Answer

The decontamination zone is where contaminated instruments are received, sorted, and cleaned to remove bioburden before further processing.

Question 4

How often should biological indicator testing be performed on a steam autoclave in a dental office?

Accepted Answer

At least weekly, or with every load containing implantable devices

Answer

CDC guidelines recommend weekly spore testing of sterilizers, and every load containing implantable devices must be tested before use.

Question 5

Which instrument reprocessing step must occur BEFORE packaging instruments for sterilization?

Accepted Answer

Thorough drying of the instruments

Answer

Instruments must be thoroughly dried before packaging to prevent corrosion and to ensure sterilant penetration is not impeded by water.

(RDA) Registered Dental Assistant Practice Test