Enteral Radiopaque Contrast Media Flashcards
What type of contrast media is administered orally and/or rectally?
Enteral
What 2 types of media are used for an enteral procedure?
Water-soluble iodinated contrast or barium sulfate
Barium is used for what two methods of opacifying the GI tract?
Rectal and orally
What type of compound is barium sulfate and gives barium excellent attenuation abilities?
Inert
What is the routine transit time for barium sulfate through the GI tract?
30-90min
What type of contrast media can be either high-osmolar or low-osmolar?
Water-soluble oral contrast
What are examples of high-osmolar agents?
Diatrizoate meglumine (conray) and diatrizoate sodium (hypaque)
What’s an example of a low-osmolar contrast?
Iohexol (omnipaque)
What is the routine transit time for water-soluble iodinated contrast through the GI tract?
30-90min
Why should barium not be used for a suspected bowel perforation?
Barium can be toxic to the peritoneum
What are 3 contraindications to barium?
Suspected perforation, pre-surgical patients, potential aspiration
What contrast agent is preferred when barium is contraindicated for a GI procedure?
Water-soluble oral contrast
What’s a contraindication to water soluble oral contrast?
Allergy
How is contrast administered for a rectal CT in order to opacity the distal large colon and rectum?
Enema
