CIS Sterilization Methods Questions and Answers 2

Question 1

What are the three critical parameters for effective steam sterilization?

Accepted Answer

Time, temperature, and pressure with saturated steam

Answer

Steam sterilization requires the simultaneous achievement of specific time, temperature, and pressure parameters with saturated steam.

Question 2

What is the difference between gravity displacement and prevacuum steam sterilizers?

Accepted Answer

Gravity relies on steam pushing air out by density, while prevacuum uses vacuum pumps to actively remove air

Answer

Gravity sterilizers rely on steam displacing air downward, while prevacuum sterilizers use vacuum pulses to actively evacuate air before steam injection.

Question 3

What is ethylene oxide sterilization and when is it used?

Accepted Answer

A low-temperature chemical gas sterilization for heat-sensitive and moisture-sensitive items

Answer

ETO uses chemical gas at low temperatures (37-63°C) to sterilize items that would be damaged by steam sterilization temperatures.

Question 4

How does hydrogen peroxide gas plasma sterilization work?

Accepted Answer

H2O2 vapor is injected into a vacuum chamber and converted to plasma by RF energy, creating reactive species

Answer

H2O2 vapor is injected into a vacuum chamber, then RF energy creates a plasma containing free radicals that destroy microorganisms on surfaces.

Question 5

What is the purpose of the aeration phase in ETO sterilization?

Accepted Answer

To remove toxic ETO residuals from sterilized materials to safe levels

Answer

Aeration removes absorbed ETO and its toxic byproducts through controlled heated circulating air, reducing residual levels to below safety limits.

CIS - Certified Instrument Specialist Practice Test

CIS - Certified Instrument Specialist Practice Test

CIS Sterilization Methods Questions and Answers 2