Contrast Study Agents

Question 1

Contrast agents can be divided into what 2 major categories?

Answer 1

positive and negative

Question 2

What is the most commonly used negative contrast agent?

Answer 2

air

Question 3

Negative contrast agents will cause the area of the x-ray with the agent to appear how?

Answer 3

black

Question 4

Positive contrast agents will cause the area of the x-ray with the agent to appear how?

Answer 4

white

Question 5

What are 3 studies, negative contrast agents are often used for?

Answer 5

stomach, upper and lower GI, bladder

Question 6

Depending on the study being performed, negative contrast agents may be administered by which routes?

Answer 6

Urinary catheter, enema, stomach tube

Question 7

What are 2 major types of positive contrast agents?

Answer 7

barium and iodine compound

Question 8

Positive contrast agents cause the x-ray to appear white because of what?

Answer 8

they stop more x-rays

Question 9

What are 3 studies that a positive contrast agent might be used for?

Answer 9

stomach, GI tract, bladder

Question 10

What is more commonly used positive contrast agent for GI studies?

Answer 10

Barium sulfate

Question 11

Which contrast agent is NEVER administered IV?

Answer 11

Barium

Question 12

What is once precaution that is unique to a radiopaque iodine agent?

Answer 12

pulls fluid into GI tract

Question 13

Depending on study being performed, water soluble iodine compounds may be administered by which routes

Answer 13

orally, stomach tube, IV, urinary catheter, enema

Question 14

Water soluble iodine preparations are _____ dense than barium

Answer 14

less

Question 15

Barium sulfate is _____ expensive than radiopaque iodine products?

Answer 15

less

Question 16

Which type of radiopaque iodine is rarely used in veterinary medicine?

Answer 16

oily/viscous iodine

Question 17

When both negative and a positive contrast agent is used, it is referred to as what?

Answer 17

double contrast

Question 18

By which route of administration are adverse reactions to the contrast agent more likely to occur?

Answer 18

IV

Question 19

What are 6 possible signs of an adverse reaction to a contrast agent?

Answer 19

nausea, vomiting, hives, local irritation, dehydration, seizures

Question 20

Why is carbon dioxide a little safer than room air as a negative contrast agent?

Answer 20

air is more likely to cause embolism

Question 21

What are 2 positive contrast agents commonly used for GI studies?

Answer 21

barium and iodine

Question 22

What are 3 negative contrast agents used for contrast studies?

Answer 22

air, oxygen, and carbon dioxide

Question 23

Which positive-contrast medium is completely insoluble in the gastrointestinal tract and is not absorbed by the abdomen or thorax if leakage occurs?

Answer 23

barium