Anatomy of the Hepatic Veins

ANATOMY OF THE HEPATIC VEIN

3 hepatic veins:

Left.
Middle.
Right.

Reach the IVC in the same funnel shaped structure as the ductus venosus
The position and direction of the hepatic veins tend to favor a functional division of the proximal IVC.

Left and medial hepatic veins join the ductus venosus on the left side of the proximal IVC and preferentially shunt blood to the LA via the foramen ovale.
Right hepatic vein joins the IVC on the right side and shunts blood to the RA.

Oxygen saturation is higher in the left hepatic vein when compared to the right hepatic vein (left lobe of liver supplied by branches of umbilical vein wheras the right lobe is supplied almost exclusively by portal blood).