Which surgical approach is enabled by the segmental nature of Couinaud anatomy?

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The segmental organization of the liver, as defined by Couinaud, divides it into eight functionally independent units, each with its own portal triad input and hepatic venous drainage. This setup lets surgeons perform segmental resections—removing only the diseased segments while leaving the remainder of the liver intact. By targeting the specific segments affected, you preserve as much healthy liver function as possible, which is crucial for patient safety and recovery. Other approaches would involve removing larger portions or the entire liver, or bypassing the liver tissue altogether, and they don’t take advantage of the precise segment boundaries that Couinaud anatomy provides.