Post-temporary ligation intra-operative mesenteric portovenography: comparison with computed tomographic angiography for investigation of portosystemic shunts

Parry, Andrew; White, Robert N.

Abstract

Objectives: Comparison of pre-operative computed tomographic angiography and post-temporary full ligation intraoperative mesenteric portovenography for the documentation of the intrahepatic portal vasculature in patients with single extrahepatic portosystemic shunts.
Methods: Retrospective study of patients with extrahepatic portosystemic shunts that underwent preoperative computed tomographic angiography and intra-operative mesenteric portovenography after temporary full ligation of an identified shunt vessel. Studies were compared for appearance of the intrahepatic portal vasculature.
Results: Fourteen dogs and five cats were included in the study with various single congenital extrahepatic portosystemic shunts variations. With the exception of those shunts involving the right gastric vein, the identification of the intrahepatic arborisation was similar on both modalities. Subjectively, however, there was improved contrast enhancement, as well as slight enlargement of the intrahepatic portal vasculature, on portovenography compared to computed tomographic angiography.
Clinical significance: This paper shows that computed tomographic angiography cannot replace intraoperative mesenteric portovenography after temporary full ligation, which provides
information regarding the development of intrahepatic portal vascularity. It is a practical and dynamic procedure providing results which are instantaneously available at the time of surgery. In addition, TFL-IOMP confirmed both that the shunting vessel had been recognised and only one vessel was present.

Citation

Parry, A., & White, R. N. (2018). Post-temporary ligation intra-operative mesenteric portovenography: comparison with computed tomographic angiography for investigation of portosystemic shunts. Journal of Small Animal Practice, 59(2), 106-111. https://doi.org/10.1111/jsap.12786

• Journal Article Type: Article
• Acceptance Date: Sep 28, 2017
• Online Publication Date: Nov 24, 2017
• Publication Date: Feb 2, 2018
• Deposit Date: Oct 3, 2017
• Publicly Available Date: Nov 25, 2018
• Journal: Journal of Small Animal Practice
• Print ISSN: 0022-4510
• Electronic ISSN: 1748-5827
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 59
• Issue: 2
• Pages: 106-111
• DOI: https://doi.org/10.1111/jsap.12786
• Keywords: Intraoperative mesenteric portovenography (IOMP), computed tomographic angiography (CTA), portosystemic shunt
• Public URL: https://nottingham-repository.worktribe.com/output/908594
• Publisher URL: http://onlinelibrary.wiley.com/doi/10.1111/jsap.12786/abstract
• Additional Information: This is the peer reviewed version of the following article: Parry, A. T. and White, R. N. (2018), Post-temporary ligation intraoperative mesenteric portovenography: comparison with CT angiography for investigation of portosystemic shunts. J Small Anim Pract, 59: 106–111. doi:10.1111/jsap.12786; which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1111/jsap.12786/abstract. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
• Contract Date: Oct 3, 2017