ARRT CT Registry Review - Contrast Administration Exam Questions & Answers (Grade A+).docx

ARRT CT Registry Review - Contrast
Administration Exam Questions &
Answers (Grade A+)
What is a positive contrast? Give two examples. -
correct answer ✅Are radiopaque contrast; high attenuation.
Iodine and Barium.


Describe osmolality. -
correct answer ✅Concentration of particles in the solution.
Propensity to pull fluid into the vessel.
Greatly affects potential for adverse reactions.


Describe ionic contrast. -
correct answer ✅Breaks into ions when injected creating a high
osmolality and in turn more risk for adverse reaction.


Describe non-ionic contrast. -
correct answer ✅Do not dissociate keeping a low osmolality.


Describe iso-osmolar contrast. -
correct answer ✅Has the same osmolality as blood causing less
reactions.

, ARRT CT Registry Review - Contrast
Administration Exam Questions &
Answers (Grade A+)
List 2 high-osmolar contrasts. -
correct answer ✅Conray
Hypaque


List 3 low-osmolar contrast. -
correct answer ✅Omnipaque
Isovue
Optiray


List 1 iso-osmolar contrast. -
correct answer ✅Visipaque


Define enteral. -
correct answer ✅Administered orally or rectally.


Time for contrast to move through GI tract? -
correct answer ✅30-90 minutes.