CRCST Instrument Processing 4

Question 1

Which factor most directly affects the efficacy of low-temperature hydrogen peroxide (H₂O₂) plasma sterilization?

Accepted Answer

The presence of moisture or cellulose materials in the chamber

Answer

Moisture and cellulose-based materials (like paper or gauze) absorb hydrogen peroxide, depleting it before sterilization is complete and causing cycle cancellations.

Question 2

An instrument set is found to have a wet pack after steam sterilization. The correct action is to:

Accepted Answer

Re-wrap and re-sterilize the set before releasing for use

Answer

A wet pack is considered compromised because moisture can wick bacteria through the packaging material, so the set must be re-wrapped and re-sterilized.

Question 3

The concept of 'event-related sterility' means that sterility is maintained until:

Accepted Answer

An event occurs that compromises package integrity

Answer

Event-related sterility holds that a properly packaged item remains sterile indefinitely unless an event such as tearing, wetting, or compression compromises the packaging.

Question 4

Which of the following is the correct order of steps in instrument processing?

Accepted Answer

Decontaminate → Inspect → Package → Sterilize

Answer

The correct sequence is decontaminate (clean and disinfect), inspect and assemble, package, then sterilize to ensure instruments are clean before sterilant exposure.

Question 5

Instrument lubrication with instrument milk (water-soluble lubricant) should be performed:

Accepted Answer

After cleaning but before sterilization

Answer

Lubrication is applied after cleaning and before sterilization so the lubricant can penetrate box locks and hinges and is compatible with steam sterilization.

(CRCST) Certified Registered Central Service Technician Exam Practice Test

(CRCST) Certified Registered Central Service Technician Exam Practice Test

CRCST Instrument Processing 4