Lower Endoscopy Procedures Flashcards

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

Answer: 6 minutes

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

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

Answer: Endoscopic mucosal resection (EMR)

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

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

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

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

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

Answer: Higher perforation rate due to thinner wall

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

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

Answer: Discontinue 7 days before

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

What anatomic landmark confirms cecal intubation during colonoscopy?

Answer: Appendiceal orifice and triradiate fold

Cecal intubation is confirmed by identifying the appendiceal orifice and triradiate fold.