Contrast Studies

Question 1

What are the common contrast studies used?

Answer 1

*Gastrointestinal studies
*Myelography- the spinal canal
*Urinary tract studies
*Cystography- helping diagnosing problems in bladder
*Urography- urinary tract studies
*Arthrography- creating a picture inside a joint

Question 2

What are the types of water iodine soluble preparation techniques?

Answer 2

conventional water soluble iodine +/- contrast
non ionic low osmolar iodine
negative contrast media
double contrast

Question 3

What are the features of conventional water-soluble iodine +/- contrast?

Answer 3

ionic salt- high pressure
licensed for i/v and p/o administration
anaphylaxis possible- hypotensive used for GI tract studies when perforation suspected
NOT USED IN MYELOGRAPHY- toxic to tissues

Question 4

What are the features of non ionic low osmolar iodine?

Answer 4

safer, can be used in myelography- low osmotic pressure
suitable for all studied but EXPENSIVE
can be used instead of barium in gut studies

Question 5

What are the features of negative contrast media?

Answer 5

low anatomic number, absorption of x-rays
radiolucent appears black, poor mucosal detailing
air
carbon dioxide
oxygen

Question 6

What are the features of double contrast?

Answer 6

negative and positive contrast used together, bladder GI,
small amount- positive contrast agent used to coat inner lining of organ, distended using negative contrast agent e.g. air
Provides excellent mucosal detail