CGRN Lower Endoscopy Procedures 2

Question 1

What is the recommended minimum withdrawal time during a screening colonoscopy?

Accepted Answer

6 minutes

Answer

A minimum 6-minute withdrawal time is recommended to maximize adenoma detection rates.

Question 2

During colonoscopy, a 1.5 cm sessile polyp is encountered. Which removal technique is most appropriate?

Accepted Answer

Endoscopic mucosal resection (EMR)

Answer

For sessile polyps 10-20 mm, EMR using submucosal injection and snare is preferred.

Question 3

Which bowel preparation outcome is adequate according to the Boston Bowel Preparation Scale?

Accepted Answer

Total score of 6 or higher with each segment at least 2

Answer

An adequate preparation requires a total score ≥6 with each of three segments scoring at least 2.

Question 4

What is the primary risk associated with electrocautery polypectomy in the right colon compared to the left?

Accepted Answer

Higher perforation rate due to thinner wall

Answer

The right colon has a thinner wall, increasing perforation risk with electrocautery.

Question 5

A patient taking clopidogrel for a recent coronary stent needs elective colonoscopy with polypectomy. How should the medication be managed?

Accepted Answer

Discontinue 7 days before

Answer

Guidelines recommend discontinuing clopidogrel 5-7 days before high-risk endoscopic procedures, coordinated with the cardiologist.

CGRN - Certified Gastroenterology Registered Nurse Practice Test