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Classification of portosystemic shunts entering the caudal vena cava at the omental foramen in dogs

White, R.N.; Warren-Smith, C.; Shales, C.; Parry, A.T.

Classification of portosystemic shunts entering the caudal vena cava at the omental  foramen in dogs Thumbnail


Authors

ROB WHITE Rob.White@nottingham.ac.uk
Professor of Practice

C. Warren-Smith

C. Shales

A.T. Parry



Abstract

Objective

To re?evaluate the anatomy and classification of congenital extrahepatic portosystemic shunts entering the caudal vena cava at the level of the omental foramen.

Material and Methods

A retrospective review of a consecutive series of dogs undergoing CT angiography as part of the diagnostic work?up for a congenital extrahepatic portosystemic shunt.

Results

In total, 53 dogs met the inclusion criteria revealing four anatomically distinct omental foramen shunt types; one of which (32 of 53 dogs) showed no shunting blood flow through the right gastric vein and three of which (21 of 53 dogs) involved shunting flow through this vessel. The anatomy of these four distinct shunt types, as defined by CT angiography, was found to be highly consistent. In all cases, regardless of the tributary vessels, the left gastric vein was the final vessel that communicated with the caudal vena cava. Using these findings, a more accurate naming classification for congenital portosystemic shunts entering the caudal vena cava at the level of the omental foramen was proposed.

Clinical Significance

A precise pre?treatment anatomical classification of congenital extrahepatic portosystemic shunts entering the caudal vena cava at the level of the omental foramen is important for a more complete understanding of the severity of clinical signs and prognosis, and for the better communication between clinicians and researchers in this clinical field.

Journal Article Type Article
Acceptance Date Jul 8, 2020
Online Publication Date Oct 9, 2020
Publication Date 2020-11
Deposit Date Jul 29, 2020
Publicly Available Date Oct 10, 2021
Journal Journal of Small Animal Practice
Print ISSN 0022-4510
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 61
Issue 11
Pages 659-668
DOI https://doi.org/10.1111/jsap.13209
Public URL https://nottingham-repository.worktribe.com/output/4794337
Publisher URL https://onlinelibrary.wiley.com/doi/abs/10.1111/jsap.13209
Additional Information This is the peer reviewed version of the following article: White, R., Warren-Smith, C., Shales, C., & Parry, A. (2020). Classification of portosystemic shunts entering the caudal vena cava at the omental foramen in dogs. Journal of Small Animal Practice, https://doi.org/10.1111/jsap.13209 , which has been published in final form at https://onlinelibrary.wiley.com/doi/abs/10.1111/jsap.13209. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.