Difference between revisions of "Contrast media"
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Revision as of 23:08, 9 November 2018
Author:
Mikael Häggström [notes 1]
Contents
Intravenous
Peroral
Rectal
Projectional radiography and fluoroscopy
- Choice of contrast medium
- Barium sulfate is generally used.
- An iodine-based contrast medium is used where there is a risk perforation, where barium may cause chemical inflammation.<[1]
- However, 1-2% of oral iodine is absorbed in the gastrointestinal tract, and can potentially case a contrast medium reaction.[2] Also, it is more expensive than barium
- Iodine-based
Recommended concentration:
- Adults: 70 mg iodine per ml, such as 240 ml of a 370mg/ml solution in 1,000 mL of tap water.[notes 2]
- Children over 5 years: 55 mg iodine per ml such as 90 ml of a 370mg/ml solution in 500 mL tap water.[notes 2]
CT scans
Rectally administered contrast is indicated in cases where a suspicion remains of penetrating trauma to the colon where an initial CT shows no reason for immediate surgery.[3]
Notes
- ↑ For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Radlines:Authorship for details.
- ↑ 2.0 2.1 370mg/ml for undiluted gastrografin:
- . AUSTRALIAN PRODUCT INFORMATION - GASTROGRAFIN (Sodium amidotrizoate / Amidotrizoate meglumine). Bayer. Retrieved on 2018-11-07.<
- . Gastrografin Dosage. Drugs.com.Medically reviewed on December 2, 2017.
References
- ↑ Dr Vikas Shah ◉ and Dr Jeremy Jones. CT luminal contrast. Radiopaedia. Retrieved on 2018-11-07.
- ↑ . Oral Contrast Policies. Yale School of Medicine. Retrieved on 2018-11-07.
- ↑ Stephen Ledbetter and Robin Smithuis (2007-08-02). Acute Abdomen - Role of CT in Trauma. Radiopaedia.
