CGRN - Certified Gastroenterology Registered Nurse Lower Endoscopy Procedures Questions and Answers

Question 1

A CGRN is reviewing a procedure report that describes the patient's colonoscopy preparation using the Boston Bowel Preparation Scale (BBPS).
The scores are: Right colon=2, Transverse colon=1, Left colon=2.
How should the nurse interpret this finding?

Accepted Answer

The total score of 5 indicates an inadequate preparation, requiring a shorter interval for repeat examination.

Answer

The preparation is adequate because two of the three segments scored a 2.

Answer

The total score of 5 is considered adequate for detecting polyps greater than 10 mm.

Answer

A total score of 6 is the minimum for adequacy, so the procedure should have been aborted.

Question 2

A patient calls the gastroenterology unit 10 hours after a colonoscopy with polypectomy. The patient reports a sudden onset of severe, constant abdominal pain, a fever of 101.2°F (38.4°C), and states their abdomen feels "hard as a rock." The CGRN should recognize these signs as most indicative of which complication?

Accepted Answer

Bowel perforation

Answer

Post-polypectomy syndrome

Answer

Delayed post-polypectomy hemorrhage

Answer

Severe gas and cramping

Question 3

During a colonoscopy, the endoscopist works to advance the scope to the beginning of the large intestine. Which of the following is considered the most definitive photographic evidence that cecal intubation has been achieved?

Accepted Answer

Identification of the appendiceal orifice

Answer

Visualization of the hepatic flexure

Answer

A view of the terminal ileum

Answer

The presence of prominent haustral folds

Question 4

A CGRN is preparing a 70-year-old patient with a history of Stage 4 chronic kidney disease and congestive heart failure for a colonoscopy. Which type of bowel preparation regimen is absolutely contraindicated for this patient due to the risk of acute phosphate nephropathy and severe electrolyte shifts?

Accepted Answer

An oral sodium phosphate (OSP) based solution.

Answer

A large-volume polyethylene glycol (PEG) based solution.

Answer

A split-dose, low-volume PEG based solution.

Answer

A preparation containing magnesium citrate.

Question 5

What is the primary advantage of using carbon dioxide (CO2) for insufflation during a colonoscopy as compared to using ambient room air?

Accepted Answer

It reduces post-procedure abdominal pain and bloating.

Answer

It provides superior mucosal visualization.

Answer

It is less expensive than using room air.

Answer

It has a lower risk of combustion during electrocautery.

Question 6

A 52-year-old patient undergoes an average-risk screening colonoscopy. The findings are limited to two tubular adenomas, both less than 10 mm, which are completely removed. Based on the 2020 U.S. Multi-Society Task Force (USMSTF) guidelines, what is the appropriate recommendation for the next surveillance colonoscopy?

Accepted Answer

7-10 years

Answer

1 year

Answer

10 years

Answer

3-5 years