3D Canine Anatomy: Portosystemic Shunt (PSS)3D Model
What is a liver shunt? The portal vein is a large vein that collects blood from the gastrointestinal system, pancreas, and spleen and carries it into the liver, where toxins and other byproducts are removed. A liver shunt occurs when an abnormal connection persists or forms between the portal vein or one of its branches, and another vein, allowing blood to bypass, or shunt, around the liver.
In the majority of cases, a liver shunt is caused by a birth defect called a congenital portosystemic shunt. In some cases, multiple small shunts form because of severe liver disease such as cirrhosis. These are referred to as acquired portosystemic shunts.