CER Endoscope Sterilization Methods Questions and Answers 5

Question 1

An endoscope manufacturer's IFU states the scope is NOT compatible with ETO sterilization. What is the MOST likely reason?

Accepted Answer

ETO residuals are absorbed by scope materials and may cause patient harm

Answer

Certain endoscope materials absorb ETO and its toxic byproducts, which may not fully dissipate even after aeration and could pose a direct injury risk to mucosal tissue.

Question 2

A heat-sensitive flexible endoscope has a single working channel with an internal diameter of 1.5mm and length of 600mm. Which sterilization method is MOST appropriate?

Accepted Answer

Ethylene oxide (ETO) sterilization per manufacturer IFU

Answer

ETO penetrates long, narrow lumens effectively and operates at low temperatures, making it the preferred sterilization method when H2O2 plasma is contraindicated by lumen geometry.

Question 3

During processing, a technician finds that the peracetic acid concentration in the STERIS System 1E fell below minimum effective concentration mid-cycle. What is the correct action?

Accepted Answer

Abort the cycle and reprocess the endoscope in a new load with fresh sterilant

Answer

A cycle in which sterilant concentration was inadequate cannot be considered a valid sterilization cycle; the endoscope must be reprocessed from the beginning in a new cycle with verified sterilant.

Question 4

Using the Spaulding classification system, flexible endoscopes that enter sterile body cavities (e.g., laparoscopes) are classified as which device category?

Accepted Answer

Critical items requiring sterilization

Answer

Critical items, per Spaulding, contact sterile tissue or enter the vascular system and must be sterilized to prevent any risk of infection.

Question 5

What is the primary occupational and environmental health concern associated with ethylene oxide (ETO) sterilization?

Accepted Answer

ETO is a known carcinogen and poses toxicity risks to healthcare workers through inhalation

Answer

ETO is classified as a human carcinogen and reproductive hazard; strict engineering controls, personal protective equipment, and OSHA exposure limits exist specifically to protect sterilization personnel.

CER - Certified Endoscope Reprocessor Practice Test

CER - Certified Endoscope Reprocessor Practice Test

CER Endoscope Sterilization Methods Questions and Answers 5