New perspectives on the development of extrahepatic portosystemic shunts

White, Robert N. and Shales, Chris and Parry, Andrew (2017) New perspectives on the development of extrahepatic portosystemic shunts. Journal of Small Animal Practice . ISSN 1748-5827 (In Press)

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Abstract

Objective: To develop a hypothesis for the developmental modality of extrahepatic portosystemic shunts.

Methods: A retrospective review of a series of dogs and cats managed for congenital portosystemic shunts. Using these data a hypothesis for the role of preferential venous blood flow in the development of common extrahepatic PSSs was postulated. In addition, an online literature search was used to retrieve peer-reviewed data describing the detailed anatomy of shunts in dogs and cats. A systematic review of these data was used as a preliminary test of the hypothesis.

Results: In total 50 dogs and 10 cats met the inclusion criteria revealing five common and distinct shunt types. In the dog, these were spleno-caval, left gastro-phrenic, left gastro-azygos and those involving the right gastric vein. The online search confirmed that these were responsible for 94% of extrahepatic shunts described in this species. In the cat, the four shunt types observed were spleno-caval, left gastro-phrenic, left gastro-caval and left gastro-azygos. Excluding the left gastro-azygos, which from the online search was not described in the cat, the spleno-caval, left gastro-phrenic and left gastro-caval were responsible for 92% of extrahepatic shunts in this species. These data were used to develop, propose and provisionally test a hypothesis for the development of extrahepatic portosystemic shunts.

Clinical Significance: We hypothesise that it is the presence of preferential blood flow that influences the subsequent formation of one of a number of defined and consistent congenital extrahepatic portosystemic shunts in dogs and cats.

Item Type: Article
Keywords: Soft tissue, cardiovascular, portosystemic shunt
Schools/Departments: University of Nottingham, UK > Faculty of Medicine and Health Sciences > School of Veterinary Medicine and Science
Depositing User: Eprints, Support
Date Deposited: 02 Aug 2017 12:32
Last Modified: 04 Aug 2017 16:44
URI: http://eprints.nottingham.ac.uk/id/eprint/44593

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