What vessels are considered intrasegmental?

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Multiple Choice

What vessels are considered intrasegmental?

Vessels that stay within the boundaries of a single hepatic segment are intrasegmental. Each segment contains its own portal triad — a branch of the portal vein, a branch of the hepatic artery, and a bile duct — all enclosed within that segment. Because these structures stay inside one segment, they’re considered intrasegmental. In contrast, the hepatic veins run along the fissures between segments and drain the segments into the IVC, so they are intersegmental. Therefore, the vessels that are intrasegmental are the portal vessels as part of the portal triad within each segment.

Vessels that stay within the boundaries of a single hepatic segment are intrasegmental. Each segment contains its own portal triad — a branch of the portal vein, a branch of the hepatic artery, and a bile duct — all enclosed within that segment. Because these structures stay inside one segment, they’re considered intrasegmental. In contrast, the hepatic veins run along the fissures between segments and drain the segments into the IVC, so they are intersegmental. Therefore, the vessels that are intrasegmental are the portal vessels as part of the portal triad within each segment.

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