CER CER - Certified Endoscope Reprocessor Chemical Disinfectants and Germicides Questions and Answers 2

Question 1

What is the primary reason superoxidized water (e.g., Sterilox) is not widely adopted for endoscope HLD in the US?

Accepted Answer

Short shelf life and must be generated on-site

Answer

Insufficient efficacy against Mycobacterium tuberculosis

Answer

Incompatibility with flexible endoscopes

Answer

Lack of FDA clearance

Question 2

Which property of hydrogen peroxide plasma sterilization makes it unsuitable for endoscopes with long, narrow lumens?

Accepted Answer

Inability to penetrate deep lumens due to diffusion limits

Answer

Excessive temperature

Answer

Corrosive effect on stainless steel

Answer

Activation of residual organic material

Question 3

When using a chemical HLD solution, how should reprocessing staff verify the solution's concentration before each use cycle?

Accepted Answer

Test with the manufacturer's specific MEC test strips

Answer

Check expiration date on the container only

Answer

Measure solution color with a colorimetric chart

Answer

Confirm pH with universal indicator paper

Question 4

OPA solution leaves a gray stain on which type of tissue if residual chemical contacts the patient?

Accepted Answer

Mucous membranes

Answer

Skin only

Answer

Bone tissue

Answer

Adipose tissue

Question 5

What is the required minimum soak time for glutaraldehyde 2.4% to achieve high-level disinfection at 25°C (77°F)?

Accepted Answer

45 minutes

Answer

10 minutes

Answer

20 minutes

Answer

60 minutes

Question 6

Which chemical disinfectant is known to fix proteins to endoscope surfaces if used before adequate cleaning?

Accepted Answer

Glutaraldehyde

Answer

Isopropyl alcohol

Answer

Peracetic acid

Answer

Quaternary ammonium compounds