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22 Cards in this Set
- Front
- Back
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Which of the following is a result of injecting a hypertonic solution into the vascular space.
a. there is a net movement of water into the vascular space b. there is a net movement of contrast media out of the vascular space c. there is a net movement of water out of the vascular space d. there is nothing noteworthy about injecting a hypertonic solution into the vascular space |
a. there is a net movement of water into the vascular space
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Which of the following is a common patient reaction to IV contrast media?
1. warmth at the injection site 2. headache 3. nausea a. 1 only b. 2 only c. 3 only d. 1, 2 & 3 |
d. 1, 2 & 3
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Low osmolar contrast media:
a. typically has the same concentration of particles as the blood b. typically has a higher concentration of particles compared to blood c. tends to cause more adverse reactions than high osmolar contrast media d. is never used in CT |
b. typically has a higher concentration of particles compared to blood
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Which of the following is TRUE regarding barium sulfate solutions used in CT?
a. they are less concentrated than those used in conventional radiography b. they are the same as those used in conventional radiography c. they are in no way related to those used in conventional radiography d. they are more concentrated than those used in conventional radiography |
a. they are less concentrated than those used in conventional radiography
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Barium sulfate oral contrast media would be selected instead of iodinated contrast media because:
1. it passes through the GI tract more quickly 2. the trauma patient may have a perforated bowel 3. the contrast media stays more dense in the distal GI tract a. 1 only b. 2 only c. 2 & 3 d. 3 only |
d. 3 only
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Which of the following may help to reduce adverse reactions resulting from the administration of IV contrast media?
1. use high osmolar contrast media 2. administer an antihistamine prior to the IV contrast injection 3. increase the rate of injection a. 1 only b. 2 only c. 3 only d. 1, 2 & 3 |
b. 2 only
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Which of the following oral contrast agents is better for opacifying the distal small intestine?
1. an ionic iodinated contrast agent 2. a non-ionic iodinated contrast agent 3. barium sulfate a. 1 only b. 2 only c. 3 only d. 1 & 2 |
c. 3 only
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Iodinated IV contrast agents perfuse normal:
a. liver tissue b. brain tissue c. thecal sac d. lymph nodes |
a. liver tissue
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Which of the following is NOT a typical adverse reaction to oral contrast media used in CT?
a. diarrhea b. abdominal cramping c. flatulence d. hives |
d. hives
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A delay of about ____ seconds after the start of the IV contrast injection should be used for a helical scan of the neck.
a. 20 b. 35 c. 50 d. 75 |
b. 35
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If there is doubt regarding the sterility of the contrast media, the contrast media must be:
a. shaken b. diluted c. heated d. discarded |
d. discarded
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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 |
c. 18 to 22
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Viscosity is a measure of a fluid's:
a. atomic weight b. thickness c. temperature d. injection rate |
b. thickness
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The viscosity of IV contrast media can be reduced by:
a. shaking b. stirring c. aerating d. heating |
d. heating
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Why is the cephalic vein a less desirable site for injection than the basilic vein?
a. it is usually a very small vein with poor blood flow b. the blood must traverse the vessels in the head before reaching the heart c. it is a deep vein and not easily catheterized d. flow may be impeded as the patient's arms are raised |
d. flow may be impeded as the patient's arms are raised
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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 |
c. 25
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There is substantial enhancement of the liver compared to tumors during the _______________ phase, but during the _______________ phase, there is the possibility of tumor enhancement, which may make hepatic tumors isodense with liver tissue.
a. bolus, equilibrium b. non-equilibrium, equilibrium c. non-equilibrium, bolus d. equilibrium, non-equilibrium |
b. non-equilibrium, equilibrium
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IV contrast agents used in CT increase the attenuation of the x-ray beam due to the concentration of ____________ in the agent.
a. iodine b. glucose c. meglumine d. barium |
a. iodine
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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 |
c. concentration of molecular particles in
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The osmolality of plasma is _______ mOsm/kg.
a. 175 b. 235 c. 285 d. 325 |
c. 285
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The portal venous phase occurs about ___________ seconds after the start of the IV contrast injection.
a. 20 to 30 b. 40 to 60 c. 60 to 90 d. 90 to 120 |
c. 60 to 90
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The hepatic arterial phase occurs about _____________ seconds after the start of the IV contrast injection.
a. 60 to 80 b. 40 to 60 c. 20 to 40 d. 0 to 20 |
c. 20 to 40
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