Difference between revisions of "Contrast media"
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==Rectal== | ==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.<<ref>{{cite web|url=https://radiopaedia.org/articles/ct-luminal-contrast|title=CT luminal contrast|author=Dr Vikas Shah ◉ and Dr Jeremy Jones|accessdate=2018-11-07|website=Radiopaedia}}</ref> | ||
| + | :However, 1-2% of oral iodine is absorbed in the gastrointestinal tract, and can potentially case a [[contrast medium reaction]].<ref>{{cite web|url=https://medicine.yale.edu/diagnosticradiology/patientcare/policies/oralcontrast.aspx|title=Oral Contrast Policies|website=Yale School of Medicine|accessdate=2018-11-07}}</ref> 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.<ref name="iodine" group="notes">370mg/ml for undiluted gastrografin: | ||
| + | *{{cite web|url=http://www.bayerresources.com.au/resources/uploads/pi/file9348.pdf|title=AUSTRALIAN PRODUCT INFORMATION - GASTROGRAFIN (Sodium amidotrizoate / Amidotrizoate meglumine)|website=Bayer|accessdate=2018-11-07}}< | ||
| + | Dosages: | ||
| + | *{{cite web|url=https://www.drugs.com/dosage/gastrografin.html|title=Gastrografin Dosage|website=Drugs.com}}Medically reviewed on December 2, 2017.</ref> | ||
| + | :Children over 5 years: 55 mg iodine per ml such as 90 ml of a 370mg/ml solution in 500 mL tap water.<ref name="iodine" group="notes"/> | ||
| + | |||
| + | ===[[CT scan]]s=== | ||
'''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.<ref>{{cite web|url=http://www.radiologyassistant.nl/en/p466181ff61073/acute-abdomen-role-of-ct-in-trauma.html#i466184acd2fdb|title=Acute Abdomen - Role of CT in Trauma|author=Stephen Ledbetter and Robin Smithuis|website=Radiopaedia|date=2007-08-02}}</ref> | '''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.<ref>{{cite web|url=http://www.radiologyassistant.nl/en/p466181ff61073/acute-abdomen-role-of-ct-in-trauma.html#i466184acd2fdb|title=Acute Abdomen - Role of CT in Trauma|author=Stephen Ledbetter and Robin Smithuis|website=Radiopaedia|date=2007-08-02}}</ref> | ||
{{Bottom}} | {{Bottom}} | ||
Revision as of 15:32, 7 November 2018
Author:
Mikael Häggström [notes 1]
Contents
Intravenous
- Contrast CT.jpg
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.
