Hepatic Segmental Anatomy: Couinaud Resection Planner (2D)

The liver is functionally divided into eight Couinaud segments, each with its own portal vein, hepatic artery and bile duct inflow and its own hepatic vein outflow — the anatomical basis for planning a liver resection. This 2D companion renders the eight segments as a flat coronal schematic with their portal and hepatic venous territories, lets you load standard resection plans (right hepatectomy, left hepatectomy, extended right trisectionectomy, left lateral sectionectomy) or build a custom plan by clicking individual segments, and tracks the resulting Future Liver Remnant percentage against the ~25-30% safety floor surgeons use to avoid post-hepatectomy liver failure.