CSSD - Central Sterile Services Department Low-Temperature Sterilization Methods Questions and Answers

Question 1

A CSSD technician is preparing to sterilize a flexible endoscope that is sensitive to heat and moisture.
Which of the following low-temperature sterilization methods would be INAPPROPRIATE for this device due to material incompatibility with its paper-based components?

Accepted Answer

Vaporized Hydrogen Peroxide (VHP)

Answer

Ethylene Oxide (EO)

Answer

Ozone (O3)

Answer

Liquid Chemical Sterilization (Peracetic Acid)

Question 2

A hospital is choosing a new low-temperature sterilization system. A primary concern is minimizing turnaround time, as there is no capacity for lengthy aeration of processed items. Which of the following methods would be the best choice to meet this requirement?

Accepted Answer

Hydrogen Peroxide Gas Plasma

Answer

Ethylene Oxide (EO)

Answer

Formaldehyde

Answer

Steam Sterilization

Question 3

Which of the following is a critical safety requirement for the area where Ethylene Oxide (EO) sterilizers are installed and operated, according to OSHA and AAMI standards?

Accepted Answer

A minimum of 10 air exchanges per hour and dedicated exhaust

Answer

Positive air pressure relative to adjacent areas

Answer

Standard room ventilation with no special requirements

Answer

Recirculated, HEPA-filtered air

Question 4

In a Hydrogen Peroxide Gas Plasma sterilization cycle, what is the primary role of the plasma phase?

Accepted Answer

To break down residual hydrogen peroxide into non-toxic byproducts

Answer

To heat the instruments to the required sterilization temperature

Answer

To generate microbicidal free radicals that kill microorganisms

Answer

To humidify the chamber and activate bacterial spores

Question 5

A new surgical device made of a novel polymer is sent to the CSSD. The manufacturer's instructions for use (IFU) state it is heat-sensitive and must be sterilized using a low-temperature method. However, the IFU does not specify a particular method. What is the technician's most appropriate first step?

Accepted Answer

Contact the device manufacturer to obtain specific, validated sterilization instructions.

Answer

Sterilize the device using Vaporized Hydrogen Peroxide as it has good material compatibility.

Answer

Choose the Ethylene Oxide cycle because it is compatible with the widest range of materials.

Answer

Process the device in the liquid chemical peracetic acid system as it is a wet process.

Question 6

The sterilant in an Ozone (O3) sterilization system is created from which commonly available utilities?

Accepted Answer

Oxygen, water, and electricity

Answer

Nitrogen, distilled water, and electricity

Answer

Hydrogen peroxide, water, and compressed air

Answer

Ethylene oxide, carbon dioxide, and steam