CGRN Infection Prevention and Control 2

Question 1

According to the Spaulding classification, endoscopes that contact intact mucous membranes are categorized as which level of device?

Accepted Answer

Semi-critical

Answer

Semi-critical devices contact intact mucous membranes and require high-level disinfection at minimum.

Question 2

What is the minimum contact time required for high-level disinfection of endoscopes using 2% glutaraldehyde at 25°C?

Accepted Answer

20 minutes

Answer

High-level disinfection with 2% glutaraldehyde requires a minimum of 20 minutes at 25°C.

Question 3

Which step in endoscope reprocessing is considered the most critical for reducing bioburden?

Accepted Answer

Manual cleaning (brushing and enzymatic detergent)

Answer

Manual cleaning physically removes organic material and bioburden that can interfere with disinfection efficacy.

Question 4

A patient scheduled for endoscopy has a known history of Creutzfeldt-Jakob disease (CJD). What is the recommended approach?

Accepted Answer

Use a disposable endoscope or quarantine the scope after use

Answer

Prions are resistant to standard disinfection. Guidelines recommend disposable endoscopes or quarantining/destroying the scope.

Question 5

What is the purpose of performing a leak test on an endoscope before reprocessing?

Accepted Answer

To detect damage to the endoscope's internal channels and outer sheath

Answer

Leak testing detects holes or cracks that could allow fluid infiltration and damage internal components or harbor microorganisms.

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