Contrast media 3

REVIEW

• TYPES OF CONTRAST & USES• ADVERSE AFFECTS OF CONTRAST USAGE• CONTRAINDICATIONS FOR CONTRAST

Review Questions

Ch 19 RTA Book - Pg 373 +

Contrast media are used in radiographic imaging to

a) increase the radiographic density of the area of interest

b) enhance the subject contrast of the area of interest

c) decrease the radiographic density of the area of interest

d) lower the subject contrast of the area of interest

Contrast media are used in radiographic imaging to

a) increase the radiographic density of the area of interest

b) enhance the subject contrast of the area of interest

c) decrease the radiographic density of the area of interest

d) lower the subject contrast of the area of interest

Radiographic images that demonstrate few density differences define

a) low subject contrastb) high subject contrastc) low x-ray photon absorptiond) high x-ray photon absorption

Radiographic images that demonstrate few density differences define

a) low subject contrastb) high subject contrastc) low x-ray photon absorptiond) high x-ray photon absorption

A negative contrast agent willa) increase density and is radiopaqueb) decrease density and is radiopaquec) decrease density and is radiolucentd) increase density and is radiolucent

A negative contrast agent willa) increase density and is radiopaqueb) decrease density and is radiopaquec) decrease density and is radiolucentd) increase density and is radiolucent

Perforation of the colon during a lower GI barium study may result in complications resulting from

a) flocculationb) bronchospasmc) convulsiond) extravasation

Perforation of the colon during a lower GI barium study may result in complications resulting from

a) flocculationb) bronchospasmc) convulsiond) extravasation

Depending on the environment of the barium sulfate,such as acid in the stomach, the powder may have a tendency to clump – this is called

a) flocculationb) bronchospasmc) convulsiond) extravasation

Depending on the environment of the barium sulfate,such as acid in the stomach, the powder may have a tendency to clump – this is called

a) flocculationb) bronchospasmc) convulsiond) extravasation

4. Perforation of the vessel while injecting a contrast media may resulting in

a) flocculationb) bronchospasmc) convulsiond) extravasation

Perforation of the vessel while injecting a contrast media may resulting in

a) flocculationb) bronchospasmc) convulsiond) extravasation

Barium sulfate:1. is filtered by the kidneys2. is absorbed by the stomach3. coats the gastrointestinal lining4. is absorbed by the jejunum

Barium sulfate:1. is filtered by the kidneys2. is absorbed by the stomach3. coats the gastrointestinal lining4. is absorbed by the jejunum

High atomic number elements absorb x-rays at a greater rate than low atomic number elements.

1. true2. false

6. High atomic number elements absorb x-rays at a greater rate than low atomic number elements.

1. true2. false

Barium sulfate is contraindicated if the patient is suspected of having a gastrointestinal tract perforation.

1. true2. false

Barium sulfate is contraindicated if the patient is suspected of having a gastrointestinal tract perforation.

1. true2. false

Radiolucent contrast media:1. are positive contrast agents2. appear dark on radiographs3. are composed of elements with high atomic

numbers4. none of the above

Radiolucent contrast media:1. are positive contrast agents2. appear dark on radiographs3. are composed of elements with high atomic

numbers4. none of the above

Radiopaque contrast media:1. are positive contrast agents2. appear light on radiographs3. are composed of elements with high atomic

numbers4. all the above

Radiopaque contrast media:1. are positive contrast agents2. appear light on radiographs3. are composed of elements with high atomic

numbers4. all the above

Each of the following is an example of a negative contrast media except:

1. air2. soda water3. barium sulfate4. gas-producing crystals

Each of the following is an example of a negative contrast media except:

1. air2. soda water3. barium sulfate4. gas-producing crystals

An air embolus can form as a complication of negative contrast media administration.

1. true2. false

An air embolus can form as a complication of negative contrast media administration.

1. true2. false

An fat embolus can form as a complication of AN OIL BASED contrast media administration.

1. true2. false

An fat embolus can form as a complication of AN OIL BASED contrast media administration.

1. true2. false

Ionic contrast media dissociates into two molecular particles in blood plasma.

1. true2. false

Ionic contrast media dissociates into two molecular particles in blood plasma.

1. true2. false

Most adverse reactions associated with Ionic contrast media are significantly decreased with the non-ionic contrast media

1. true2. false

Most adverse reactions associated with Ionic contrast media are significantly decreased with the non-ionic contrast media

1. true2. false

Which of the following acute reactions to contrast media usually requires no medical treatment?

a) bronchospasmb) laryngeal edemac) urticariad) convulsions

Which of the following acute reactions to contrast media usually requires no medical treatment?

a) bronchospasmb) laryngeal edemac) urticariad) convulsions

Which of the following acute reactions to contrast media usually requires immediate medical treatment?

a) Bronchospasm / laryngeal edemab) Nausea & Vomitingc) Urticariad) Warn flush /metallic taste

Which of the following acute reactions to contrast media usually requires immediate medical treatment?

a) Bronchospasm / laryngeal edemab) Nausea & Vomitingc) urticariad) Warn flush /metallic taste

What can be done for a patient who will receive water- soluble iodine contrast media to reduce allergic-like effects?

a) premedicate with steroids and antihistamines b) give intravenous fluidsc) instruct the patient to drink warm salt water before

the procedured) give a negative contrast agent with the iodinated

medium

What can be done for a patient who will receive water- soluble iodine contrast media to reduce allergic-like effects?

a) premedicate with steroids and antihistamines b) give intravenous fluidsc) instruct the patient to drink warm salt water before

the procedured) give a negative contrast agent with the iodinated

medium

When you schedule multiple procedures, what examination is usually done last?

a) thyroid function testsb) Upper GIc) air-contrast colon (BE-AC)d) Intravenous pyelogram (IVP)

When you schedule multiple procedures, what examination is usually done last?

a) thyroid function testsb) Upper GIc) air-contrast colon (BE-AC)d) Intravenous pyelogram (IVP)

It will take the BA the longest to travel through the GI tract

When you schedule multiple procedures, using contrast media – which examination must be done first?

a) thyroid function tests (Nuc Med)b) Upper GIc) air-contrast colon (BE-AC)d) Intravenous pyelogram (IVP)

When you schedule multiple procedures, using contrast media – which examination must be done first?

a) thyroid function tests (Nuc Med)b) Upper GIc) air-contrast colon (BE-AC)d) Intravenous pyelogram (IVP)

WHY?

End of Contrast Media for Special Procedures

RT 255 -2008