What is a positive contrast? Give two examples. correct answers Are radiopaque contrast; high attenuation.
Iodine and Barium.
Describe osmolality. correct answers Concentration of particles in the solution.
Propensity to pull fluid into the vessel.
Greatly affects potential for adverse react...
ARRT CT Registry Review - Contrast Administration ||
100% VERIFIED
What is a positive contrast? Give two examples. correct answers Are radiopaque contrast;
high attenuation.
Iodine and Barium.
Describe osmolality. correct answers Concentration of particles in the solution.
Propensity to pull fluid into the vessel.
Greatly affects potential for adverse reactions.
Describe ionic contrast. correct answers Breaks into ions when injected creating a high
osmolality and in turn more risk for adverse reaction.
Describe non-ionic contrast. correct answers Do not dissociate keeping a low osmolality.
Describe iso-osmolar contrast. correct answers Has the same osmolality as blood causing less
reactions.
List 2 high-osmolar contrasts. correct answers Conray
Hypaque
List 3 low-osmolar contrast. correct answers Omnipaque
Isovue
Optiray
List 1 iso-osmolar contrast. correct answers Visipaque
Define enteral. correct answers Administered orally or rectally.
Time for contrast to move through GI tract? correct answers 30-90 minutes.
Contraindication for WSI contrast? correct answers Iodine allergy
What is a negative contrast? Give 3 examples. correct answers Are radiolucent contrasts; low
attenuation.
Room air, gasses, water.
Effervescent granules.
Carbonated beverages.
What is a neutral contrast? Give 1 example. correct answers Distend the GI tract without
affecting attenuation.
VoLumen.
What are the ACR's 4H's? correct answers ACR's special considerations for contrast
administration.
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