Portal venous gas is merely the accumulation of gas in the portal vein and its branches. It needs to be distinguished from pneumobilia, although this is usually not too problematic, when associated findings are taken into account along with the pattern of gas (i.e. peripheral in portal venous gas, central in pneumobilia).
Although traditionally considered a harbinger of death, portal venous gas is increasingly recognised in a variety of conditions, many of which do not carry as high mortality or morbidity risks.
Causes of portal venous gas are best divided according to the age of the patient:
- alterations of bowel wall
- bowel luminal distention
- iatrogenic gastric and bowel dilatation (e.g upper and lower endoscopic procedures, enemas)
- paralytic ileus / mechanical obstruction
- acute gastric dilatation
- Intra-abdominal sepsis
- unknown mechanism
This article is in need of some more references!
You can make a difference to Radiopaedia.org by adding some relevant ones.
- 1. Eisenberg RL. Gastrointestinal radiology, a pattern approach. Lippincott Williams & Wilkins. (1996) ISBN:0397514808. Read it at Google Books - Find it at Amazon
- 2. Sebastià C, Quiroga S, Espin E et-al. Portomesenteric vein gas: pathologic mechanisms, CT findings, and prognosis. Radiographics. 20 (5): 1213-24. Radiographics (full text) - Pubmed citation
- 3. Dähnert W. Radiology Review Manual. Lippincott Williams & Wilkins. (2011) ISBN:1609139437. Read it at Google Books - Find it at Amazon
Synonyms & Alternative Spellings
|Synonyms or Alternative Spelling||Include in Listings?|
|Gas within the portal venous system||✗|
|Portal venous air||✗|