Contrast Flashcards
(23 cards)
Ionic contrast media
•salts consisting of sodium or meglumine
HOCM
- high-osmolar contrast media
* Conray
Non-ionic contrast media
- non-salt
- often referred as LOCM low-osmolar contrast media
- iohexol (omnipaque)
Contrast least likely to cause adverse effects/reaction
•non-ionic low osmolar
Advantages of iOCM
- ISO-osmolar contrast media
* same osmolality as blood therefore better pt comfort and reduced side effects
What contrast is considered non-ionic IOCM
- iohexol (omnipaque)
- iopamidol (isovue)
- ioversol (optitray)
Enteral RCM administered how
•orally or rectally to highlight GI tract
Two factors that pertain to bolus duration of iv contrast
- injection flow
* contrast volume
Iohexol (omnipaque)
- non-ionic CM
- non-salt
- low-osmolar CM
Iodixanol (visipaque)
•non ionic ISO-osmolar contrast
After about ________ the iodinated contrast in blood plasma is reduced half of the administered volume
•2 hours
A solution of _________% of iodine water soluble contrast is sufficient enough enough opacification
•2-5%
Isodense
•unable to differentiate contrast in structure because everything is uniformly dense
Does diverticulitis need contrast
•no contrast
Does renal cyst need contrast
•yes the cystic area should be at or near zero attenuation
CT Barium %
•2%
The dosage of IV contrast media is
•2mL/kg of body weight
Quantity of oral contrast for routine abdomen with a wait time of
- 450mL
* 60-90 min
Mastectomy and iv’s
•IV should be performed on opposite arm if mastectomy to prevent fluid retention site does not allow drainage
Determining flow rate
•volume/time
The max contrast for peds is
•3mg per kg of body weight
CT HU of unenhanced spleen
•+40 to +60 HU
Corticomedullary phase
•late arterial 30-40 secs
