ARRT CT Registry Review - Contrast Administration Questions and Answers Rated A+
What is a positive contrast? Give two examples.
Are radiopaque contrast; high attenuation.
Iodine and Barium.
Describe osmolality.
Concentration of particles in the solution.
Propensity to pull fluid into t...
What is a positive contrast? Give two examples. - answer Are radiopaque contrast; high
attenuation.
Iodine and Barium.
Describe osmolality. - answer Concentration of particles in the solution.
Propensity to pull fluid into the vessel.
Greatly affects potential for adverse reactions.
Describe ionic contrast. - answer Breaks into ions when injected creating a high
osmolality and in turn more risk for adverse reaction.
Describe non-ionic contrast. - answer Do not dissociate keeping a low osmolality.
Describe iso-osmolar contrast. - answer Has the same osmolality as blood causing less
reactions.
List 2 high-osmolar contrasts. - answerConray
Hypaque
List 3 low-osmolar contrast. - answerOmnipaque
Isovue
Optiray
List 1 iso-osmolar contrast. - answerVisipaque
Define enteral. - answerAdministered orally or rectally.
Time for contrast to move through GI tract? - answer30-90 minutes.
Contraindications for barium? - answerPerforation, blockage, impending surgery,
aspiration risk.
Contraindication for WSI contrast? - answerIodine allergy
What is a negative contrast? Give 3 examples. - answerAre radiolucent contrasts; low
attenuation.
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