GI Labs and Imaging

Question 1

Upper endoscopy evaluates:

Answer 1

Esophagus, stomach, duodenum

Question 2

Lower endoscopy evaluates:

Answer 2

Colon and distal ileum

Question 3

What is the test of choice for colon cancer screen and surveillance?

Answer 3

Colonoscopy

Question 4

What part of the GI tract does a sigmoidoscopy evaluate?

Answer 4

Colon up to splenic flexure

Question 5

What does a sigmoidoscopy assess?

Answer 5

Distal colon for inflammation in patients w/low colon cancer risk

Question 6

What is a capsule endoscopy?

Answer 6

Small intestine evaluation - a camera is contained in a capsule that the patient swallows

Question 7

What is the main risk factor for developing peptic ulcer, gastric adenocarcinoma and gastric MALT lymphoma?

Answer 7

H pylori

Question 8

How can H. pylori be tested for?

Answer 8

Invasively by endoscopy or non-invasively (serology, 13-C urea breath test, stool antigen test)

Question 9

What is the most consistently accurate test for H. pylori?

Answer 9

Urea breath test

• Pt drinks urea solution w/nonradioactive isotope C
• Blows into a tube
• If H. pylori present, urea is hydrolyzed and CO2 is detected

Question 10

Describe contrast radiography in GI evaluation

Answer 10

• Barium used as contrast medium

- Provides mucosal definition

Question 11

Angiography is useful for assessing what in the GI tract?

Answer 11

• Mesenteric ischemia

- Spread of malignancy

Question 12

What does scintigraphy evaluate?

Answer 12

Structure, luminal transit, esophageal and gastric emptying