Transcript Contrast media 3

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 contrast
b) high subject contrast
c) low x-ray photon absorption
d) high x-ray photon absorption
Radiographic images that demonstrate few
density differences define
a) low subject contrast
b) high subject contrast
c) low x-ray photon absorption
d) high x-ray photon absorption
A negative contrast agent will
a) increase density and is radiopaque
b) decrease density and is radiopaque
c) decrease density and is radiolucent
d) increase density and is radiolucent
A negative contrast agent will
a) increase density and is radiopaque
b) decrease density and is radiopaque
c) decrease density and is radiolucent
d) increase density and is radiolucent
Perforation of the colon during a lower GI
barium study may result in complications
resulting from
a) flocculation
b) bronchospasm
c) convulsion
d) extravasation
Perforation of the colon during a lower GI
barium study may result in complications
resulting from
a) flocculation
b) bronchospasm
c) convulsion
d) 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) flocculation
b) bronchospasm
c) convulsion
d) 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) flocculation
b) bronchospasm
c) convulsion
d) extravasation
4. Perforation of the vessel while injecting a
contrast media may resulting in
a) flocculation
b) bronchospasm
c) convulsion
d) extravasation
Perforation of the vessel while injecting a
contrast media may resulting in
a) flocculation
b) bronchospasm
c) convulsion
d) extravasation
Barium sulfate:
1. is filtered by the kidneys
2. is absorbed by the stomach
3. coats the gastrointestinal lining
4. is absorbed by the jejunum
Barium sulfate:
1. is filtered by the kidneys
2. is absorbed by the stomach
3. coats the gastrointestinal lining
4. is absorbed by the jejunum
High atomic number elements absorb x-rays at a
greater rate than low atomic number
elements.
1. true
2. false
6. High atomic number elements absorb x-rays
at a greater rate than low atomic number
elements.
1. true
2. false
Barium sulfate is contraindicated if the patient is
suspected of having a gastrointestinal tract
perforation.
1. true
2. false
Barium sulfate is contraindicated if the patient
is suspected of having a gastrointestinal tract
perforation.
1. true
2. false
Radiolucent contrast media:
1. are positive contrast agents
2. appear dark on radiographs
3. are composed of elements with high atomic
numbers
4. none of the above
Radiolucent contrast media:
1. are positive contrast agents
2. appear dark on radiographs
3. are composed of elements with high atomic
numbers
4. none of the above
Radiopaque contrast media:
1. are positive contrast agents
2. appear light on radiographs
3. are composed of elements with high atomic
numbers
4. all the above
Radiopaque contrast media:
1. are positive contrast agents
2. appear light on radiographs
3. are composed of elements with high atomic
numbers
4. all the above
Each of the following is an example of a
negative contrast media except:
1. air
2. soda water
3. barium sulfate
4. gas-producing crystals
Each of the following is an example of a
negative contrast media except:
1. air
2. soda water
3. barium sulfate
4. gas-producing crystals
An air embolus can form as a complication of
negative contrast media administration.
1. true
2. false
An air embolus can form as a complication of
negative contrast media administration.
1. true
2. false
An fat embolus can form as a complication of
AN OIL BASED contrast media administration.
1. true
2. false
An fat embolus can form as a complication of
AN OIL BASED contrast media administration.
1. true
2. false
Ionic contrast media dissociates into two
molecular particles in blood plasma.
1. true
2. false
Ionic contrast media dissociates into two
molecular particles in blood plasma.
1. true
2. false
Most adverse reactions associated with Ionic
contrast media are significantly decreased
with the non-ionic contrast media
1. true
2. false
Most adverse reactions associated with Ionic
contrast media are significantly decreased
with the non-ionic contrast media
1. true
2. false
Which of the following acute reactions to
contrast media usually requires no medical
treatment?
a) bronchospasm
b) laryngeal edema
c) urticaria
d) convulsions
Which of the following acute reactions to
contrast media usually requires no medical
treatment?
a) bronchospasm
b) laryngeal edema
c) urticaria
d) convulsions
Which of the following acute reactions to
contrast media usually requires immediate
medical treatment?
a) Bronchospasm / laryngeal edema
b) Nausea & Vomiting
c) Urticaria
d) Warn flush /metallic taste
Which of the following acute reactions to
contrast media usually requires immediate
medical treatment?
a) Bronchospasm / laryngeal edema
b) Nausea & Vomiting
c) urticaria
d) Warn flush /metallic taste
What can be done for a patient who will receive watersoluble iodine contrast media to reduce allergic-like
effects?
a) premedicate with steroids and antihistamines
b) give intravenous fluids
c) instruct the patient to drink warm salt water before
the procedure
d) give a negative contrast agent with the iodinated
medium
What can be done for a patient who will receive watersoluble iodine contrast media to reduce allergic-like
effects?
a) premedicate with steroids and antihistamines
b) give intravenous fluids
c) instruct the patient to drink warm salt water before
the procedure
d) give a negative contrast agent with the iodinated
medium
When you schedule multiple procedures, what
examination is usually done last?
a) thyroid function tests
b) Upper GI
c) air-contrast colon (BE-AC)
d) Intravenous pyelogram (IVP)
When you schedule multiple procedures, what
examination is usually done last?
a) thyroid function tests
b) Upper GI
c) 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 GI
c) 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 GI
c) air-contrast colon (BE-AC)
d) Intravenous pyelogram (IVP)
WHY?
End of Contrast Media
for Special Procedures
RT 255 -2008