ANATOMY OF THE HEPATIC VEINS IN THE RIGHT L/VER !N HUMANS
Keywords:
liver, hepatic segmentation, hepatic lobe, hepatic veins, anatomyAbstract
Detailed knowledge of the venous drainage of the right part of the liver is important for examination methods and surgical procedures in liver diseases. The hepatic veins and the portal vein in the right part of 40 livers fixed and preserved in formaldehyde solution were dissected. The right hepatic vein was classified into four types, according to its drainage territory: usual (70.0%) and hyperdeveloped (12.5%) types, for hepatic segments S6, S7, S8 and a respectively smaller and greater than S5; restricted to the upper third of the right lobe (10.0%) for segments S7 and S8 and restricted to the upper two-thirds of the lobe (7.5%) for segments S7, S8 and part of S6. The short hepatic veins (52.5%) helped drain the S6 and S7 segments and flowed directly into the inferior vena cava. The right anterior vein (22.5%), a tributary of the large intermediate hepatic vein, drained the lowest part of the S6 segment. The right hepatic vein, the short hepatic veins and the anterior right hepatic vein showed complementarity in the venous drainage of the lateral division of the right part of the liver (segments S6 and S7). In the upper region of the right lobe (segments S7 and S8), five types of right upper rootlets were observed, classified according to their topographic relationships with the segmental portal branches (P7 and P8), the short hepatic veins and the right hepatic veins. and intermediate, in the following rootlets: posterior (77.5%), anterior (92.5%), lateral (85.0%), medial (37.5%) and intersegmental (57.5%).
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References
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