实验动物肺和肝脏分叶数

实验动物肺和肝脏分叶数

表12-76实验动物肺和肝脏分叶数[3，29]

肝脏分叶精美图解

肝脏分叶精美图解 Liver Segmental Anatomy Robin Smithuis Liver anatomy can be described using two different aspects: morphological anatomy and functional anatomy. The traditional morphological anatomy is based on the external appearance of the liver and does not show the internal features of vessels and biliary ducts branching, which are of obvious importance in hepatic surgery. C. Couinaud (1957) divided the liver into eight functionally indepedent segments. This classification will be presented here with several illustrations. Couinaud classification The Couinaud classification of liver anatomy divides the liver into eight functionally indepedent segments. Each segment has its own vascular inflow, outflow and biliary drainage. In the centre of each segment there is a branch of the portal vein, hepatic artery and bile duct. In the periphery of each segment there is vascular outflow through the hepatic veins. Right hepatic vein divides the right lobe into anterior and posterior segments. Middle hepatic vein divides the liver into right and left lobes (or right and left hemiliver). This plane runs from the inferior vena cava to the gallbladder fossa. Left hepatic vein divides the left lobe into a medial and lateral part. Portal vein divides the liver into upper and lower segments. The left and right portal veins branch superiorly and inferiorly to project into the center of each segment. Because of this division into self-contained units, each segment can be resected without damaging those remaining. For the liver to remain viable, resections must proceed along the vessels that define the peripheries of these segments. This means, that resection-lines parallel the hepatic veins, The centrally located portal veins, bile ducts, and hepatic arteries are preserved. 根据Couinaud分段