MICC PRACTICE TEST CH.5

Question 1

What should be done if extravasating is noticed at the injection site?
A. Apply ice and continue injecting.
B. Stop the injection immediately.
C. Slap the area.
D. Apply heat during the injection.

Answer 1

B - Stop the injection immediately.

Question 2

Which of the following is the order in which the phases of IV contrast enhancement occur?
A. Bolus, equilibrium, non-equilibrium.
B. Equilibrium, non-equilibrium, bolus.
C. Bolus, non-equilibrium, equilibrium.
D. Non-equilibrium, equilibrium, bolus.

Answer 2

C - Bolus, non-equilibrium, equilibrium.

Question 3

Which of the following oral contrast agents is better for opacifying the distal small intestines?
A. An ionic iodinated contrast agent.
B. A non-ionic iodinated contrast agent.
C. Barium sulfate.
D. A and B only.
E. A, B, and C.

Answer 3

C - Barium Sulfate.

Question 4

The definition of Osmolality is the __________ the contrast agent solution.
A. Thickness of.
B. Measure of dissociation of.
C. Concentration of molecular particles in.
D. Rate of injection of.

Answer 4

C - Concentration of molecular particles in.

Question 5

When a contrast agent is injected directly into the joint space is known as __________ contrast.
A. Intravenous.
B. Intrathecal.
C. Oral.
D. Intraarticular.

Answer 5

D - Intraarticular.

Question 6

Which of the following characteristics of an IV contrast agent affects patient tolerance?
A. Concentration of iodine.
B. Osmolality.
C. Viscosity.
D. All of the above.

Answer 6

D - All of the above.

Question 7

The viscosity of IV contrast media can be reduced by:
A. Shaking.
B. Stirring.
C. Aerating.
D. Heating.

Answer 7

D - Heating.

Question 8

The heating unit on a power injector is for __________ of the contrast agent.
A. Increasing the iodine concentration.
B. Decreasing the viscosity.
C. Increasing the density.
D. Decreasing the Osmolality.

Answer 8

B - Decreasing the viscosity.

Question 9

A difference in density of __________ HU between the aorta and the inferior vena cava would indicate the non-equilibrium phase of enhancement.
A. 43.
B. 35.
C. 25.
D. 8.

Answer 9

C. 25.

Question 10

A delay of about _____ seconds after the start of the IV contrast injection should be used for a helical scan of the chest.
A. 60.
B. 45.
C. 30.
D. 15.

Answer 10

C - 30.

Question 11

Barium sulfate oral contrast media would be selected instead of iodinated oral contrast media because: (Choose one or more correct answers).
1. It passes through the GI tract more quickly.
2. The trauma pt may have a perforated bowel.
3. The contrast media stays more dense in the distal GI tract.

Answer 11

3 only.

Question 12

The most common catheter size used in CT is _________ gauge.
A. 12 to 14.
B. 15 to 17.
C. 18 to 22.
D. 23 to 25.

Answer 12

C. 18 to 22.

Question 13

If there is doubt regarding the sterility of the contrast media, the contrast media must be:
A. Shaken.
B. Diluted.
C. Heated.
D. Discarded.

Answer 13

D - Discarded.

Question 14

An indication for IV contrast injection is to rule out:
A. Mastoiditis.
B. Sinusitis.
C. Meningioma.
D. Grave’s disease.

Answer 14

C - Meningioma.

Question 15

The osmolality of plasma is _____ mOsm/kg.

Answer 15

285.

Question 16

Which of the following is FALSE about the catheter used to administer iodinated IV contrast during CT exams?
A. specially labeled PowerPICCs may be used up to 5 mL/sec.
B. standard peripherally inserted central catheters like those used for chemotherapy are required.
C. typically an 18-to-22-gauge catheter is selected.
D. larger catheters are used for higher rates of injection.

Answer 16

B. standard peripherally inserted central catheters like those used for chemotherapy are required.

Question 17

A delay of about _____ seconds after the start of the IV contrast injection should be used for a helical scan of the neck.

Answer 17

35 seconds.

Question 18

What does the ACR say about IV contrast media with pregnant patients?

Answer 18

Iodinated contrast media be given to pregnant patients only when:
- the diagnostic info requested from a contrast-enchanced study cannot be obtained through other means.
- the clinical info needed will affect the care of the pt & fetus during pregnancy.
- it is not prudent to wait to obtain the info until after the pt is no longer pregnant.