CONTRAST MEDIA

Question 1

are used to render the gastrointestinal tract visible radiographically​

Answer 1

Radiolucent and radiopaque contrast media (CONTAST MEDIA)

Question 2

Are substances having higher atomic number than the surrounding tissues and they usually appear white in the radiograph.

Answer 2

positive contrast media

Question 3

an example of a positive contrast media

Answer 3

barium sulfate (BaSo4)

Question 4

3 uses of barium sulfate

Answer 4

Examination of the esophagus ​

Small intestine ​

UGIS

Question 5

Are substances having lower atomic number than the surrounding tissues and it appears black in the radiograph. ​

Answer 5

negative contrast media

Question 6

what are examples of negative contrast media

Answer 6

air
CO2
O2

Question 7

contrast media include swallowed air, CO2 gas crystals, and the normally present gas bubble in the stomach. Calcium and magnesium citrate carbonate crystals are frequently used to produce CO2 gas.​

Answer 7

Radiolucent, or negative,​

Question 8

are frequently used to produce CO2 gases

Answer 8

Calcium

magnesium citrate carbonate crystals

Question 9

The most common positive, or radiopaque, contrast medium used to visualize the gastrointestinal system is barium sulfate (BaSO4),

Answer 9

barium sulfate (barium)

Question 10

A mixture of barium sulfate and water forms a ________, not a _________

Answer 10

colloidal suspension

solution

Question 11

T/F: Barium sulfate never dissolves in water

Answer 11

true

Question 12

the particles suspended in water tend to settle over time when allowed to sit​

Answer 12

colloidal suspension

Question 13

T/F: Thin barium has the consistency of a thin milkshake and is used to study the entire gastrointestinal tract​

Answer 13

true

Question 14

what is the measurement of thin barium

Answer 14

1 part BaSO4 to 1-part water

Question 15

have the consistency of cooked cereal

Answer 15

thick barium

Question 16

T/F: Thick barium is more difficult to swallow but is well suited for use in the esophagus​

Answer 16

true

Question 17

What are the properties of barium sulfate

Answer 17

Absorbs water ​

Has a high atomic number (74)​

It is insoluble in water ​

It cannot be absorbed in the GIT​

Non-toxic ​

Question 18

anything being injected or swallowed. Contrast media which is taken by mouth. ​

Answer 18

oral method

Question 19

either intravenously or intradermally

Answer 19

injectable method

Question 20

catheter, fumes being inserted to the anus or nose

Answer 20

non-injectable thing

Question 21

T/F: a mixture of barium might escape into the peritoneal cavity

Answer 21

true

Question 22

If large amounts of barium sulfate escape into the peritoneal cavity, this can lead to _____________

Answer 22

intestinal infarcts or peritonitis. ​

Question 23

contains 37% organically bound iodine, which opacifies the gastrointestinal tract. It can be removed easily by aspiration before or during surgery.

Answer 23

water-soluble contrast agent

Question 24

what kind of taste does the water-soluble materials have?

Answer 24

bitter taste

Question 25

T/F: Water-soluble iodinated contrast media should be used if the patient is sensitive to iodine, or if the patient is experiencing severe dehydration.

Answer 25

false (not)

Question 26

T/F: . A water-soluble contrast agent often further dehydrates the patient.

Answer 26

true

Question 27

the radiopaque contrast medium

Answer 27

barium sulfate

Question 28

procedures employing both radiolucent and radiopaque contrast media ​

Answer 28

double contrast

Question 29

T/F: One of the functions of the large intestine is to absorb water. Any barium sulfate mixture remaining in the large intestine after an upper GI series or barium enema may become solidified. Consequently, the barium may be difficult to evacuate. Some patients may require a laxative after these examinations to help remove the barium sulfate. ​

Answer 29

TRUE