Post‐temporary ligation intraoperative mesenteric portovenography: comparison with CT angiography for investigation of portosystemic shunts

• Published in: Journal of small animal practice Vol. 59; no. 2; pp. 106 - 111
• Main Authors: Parry, A. T., White, R. N.
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01-02-2018; Wiley Subscription Services, Inc
• Subjects: Angiography; Animals; Cats - abnormalities; Cats - surgery; Computed Tomography Angiography - methods; Computed Tomography Angiography - veterinary; Dogs - abnormalities; Dogs - surgery; Female; Ligation; Male; Medical imaging; Phlebography - veterinary; Portal Vein - abnormalities; Portal Vein - diagnostic imaging; Portal Vein - surgery; Portasystemic Shunt, Surgical - veterinary; Shunts; Surgery; Vascular Malformations - surgery; Vascular Malformations - veterinary
• ISSN: 0022-4510; 1748-5827
• DOI: 10.1111/jsap.12786

Objectives
Comparison of pre‐operative CT angiography and post‐temporary, full‐ligation, intraoperative, mesenteric portovenography for the characterisation of intrahepatic portal vasculature in patients with single extrahepatic portosystemic shunts.
Methods
Descriptive analysis of previously collected images from 14 dogs and five cats.
Results
With the exception of shunts involving the right gastric vein, intrahepatic arborisation appeared similar on both modalities. Portovenography improved contrast enhancement and slightly enlarged the intrahepatic portal vasculature.
Clinical Significance
CT angiography cannot replace intraoperative mesenteric portovenography after temporary full ligation, which provides information on intrahepatic portal vascularity. It is a practical and dynamic procedure, providing results that are instantaneously available at the time of surgery. In addition, intraoperative post‐temporary, full‐ligation, mesenteric portography confirmed that the single shunting vessel had both been recognised and ligated.