Correção de desvio (Shunt) portossistêmico com técnica de colocação de constritor ameróide em cão: relato de caso

Abstract

Portosystemic shunts are vascular anomalies that divert blood from the portal vein directly to the systemic circulation, preventing prior passage through the liver, which leads to liver hypofunction and subsequent symptoms. Portosystemic shunts can be extrahepatic or intrahepatic, congenital or acquired, and the congenital extrahepatic type is the most common in small breed dogs, such as Yorkshire Terrier. Definitive therapy for shunts aims to close the anomalous vessel, restoring normal hepatic blood flow. Among the surgical techniques described for this purpose, the placement of an ameroid constrictor stands out. This study aims to describe the case of a dog diagnosed with congenital extrahepatic portosystemic shunt and treated with a surgery to implant this type of constrictor. After surgical treatment, the dog was followed up by periodic clinical and laboratory evaluations that showed complete reversal of the condition, remaining healthy until the present day, over 3 years after the intervention. It is concluded that the technique of placing an ameroid constrictor was able to restore health and provide a favorable prognosis.