MDRAO Decontamination and Cleaning Processes 2

Question 1

According to CSA Z314 standards, what is the correct sequence for manual cleaning of surgical instruments?

Accepted Answer

Pre-rinse, enzymatic soak, scrub under water, final rinse

Answer

Rinse, scrub, inspect, dry

Answer

Scrub, rinse, inspect, dry

Answer

Dry, scrub, soak, rinse

Question 2

What water quality is recommended for the final rinse of surgical instruments in an automated washer-disinfector?

Accepted Answer

Treated/purified water (RO or DI water)

Answer

Tap water

Answer

Softened water

Answer

Distilled water only

Question 3

Which pH range is most effective for enzymatic cleaning detergents used in instrument decontamination?

Accepted Answer

pH 6–8 (near neutral)

Answer

pH 2–4 (strongly acidic)

Answer

pH 4–5 (mildly acidic)

Answer

pH 10–12 (strongly alkaline)

Question 4

What is the primary purpose of a washer-disinfector's thermal disinfection cycle in instrument reprocessing?

Accepted Answer

To reduce microbial load to a safe level after mechanical cleaning

Answer

To sterilize instruments before packaging

Answer

To remove chemical residues from detergents

Answer

To dry instruments before inspection

Question 5

Why must hollow-lumen instruments such as endoscopes receive special attention during the decontamination process?

Accepted Answer

Lumens can harbour biofilm and organic material that standard surface cleaning may miss

Answer

They are made of fragile materials that break easily

Answer

They require higher temperature washing cycles

Answer

They must be processed in a separate building

Question 6

What does the term 'bioburden' refer to in the context of instrument decontamination?

Accepted Answer

The number and types of viable microorganisms contaminating an instrument before sterilization

Answer

The weight of biological tissue on the instrument

Answer

The chemical load from cleaning detergents

Answer

The mineral deposits from hard water