CGRN Lower Endoscopy Procedures 3

Question 1

During colonoscopy with CO2 insufflation, the patient develops abdominal distention and discomfort. What is the most likely cause?

Accepted Answer

Excessive insufflation rate

Answer

CO2 toxicity

Answer

Bowel perforation

Answer

Normal response to CO2

Question 2

What is the recommended surveillance interval after removing 3-4 tubular adenomas, each less than 10 mm, with low-grade dysplasia?

Accepted Answer

3 years

Answer

1 year

Answer

5 years

Answer

10 years

Question 3

Which position change can help advance the colonoscope through a difficult sigmoid colon?

Accepted Answer

Left lateral to supine or right lateral position

Answer

Right lateral decubitus

Answer

Trendelenburg position

Answer

Prone position

Question 4

What is post-polypectomy electrocoagulation syndrome?

Accepted Answer

Transmural thermal injury causing peritoneal irritation without full perforation

Answer

Infection at the polypectomy site

Answer

Delayed hemorrhage from the polypectomy site

Answer

Allergic reaction to the electrosurgical pad

Question 5

During colonoscopy, bright red blood obscures the view. What is the nurse's priority action?

Accepted Answer

Irrigate the area and assist with hemostasis while monitoring vital signs

Answer

Immediately withdraw the scope

Answer

Apply abdominal pressure

Answer

Increase sedation depth

Question 6

What is the minimum acceptable adenoma detection rate (ADR) for screening colonoscopies?

Accepted Answer

25%

Answer

15%

Answer

20%

Answer

35%