CT Week 2 Flashcards
Positive agents have a — density than the structures
Higher
4 routes of contrast administration
Oral
Rectal
Intravenous/ intra-arterial
Intrathecal
Mechanical bolus advantages
Precise flow rate
Consistent / reproducible
Programmable
Anaphylactic reaction
Severe reaction occurring immediately after exposure to a drug; characterized by respiratory distress and vascular collapse triggered by immunoglobulin E
Barium should NOT be used for
Patient with suspected GI Perforation/trauma
Examples of positive agents
Barium
Iodine
Neutral agents have similar density to
Water
3 phases of tissue enhancement
Bolus phase
Non equilibrium phase
Equilibrium phase
Delayed side effects
Skin: itching, rash, hives
GI: nausea, vomiting, diarrhea
General: headache, dizziness, fever
Examples of negative agents
Air
CO2