What is a Hepatic Vein?

A branch of the inferior vena cava of the hepatic vein. The hepatic vein has 2 to 3 trunks to collect all blood transported by the hepatic artery and portal vein into the liver, and injected into the inferior vena cava in the inferior vena cava fossa. The main venous branches of hepatic veins are the right hepatic vein, middle hepatic vein, and left hepatic vein; in addition, there are several hepatic small veins that directly collect venous blood from the liver and inject it into the inferior vena cava. There are branches of hepatic veins in hepatic fissures, so when hepatic lobe resection, special attention should be paid to the incision should be a certain distance away from the hepatic fissure, so as not to damage the hepatic veins and cause bleeding.

A branch of the inferior vena cava of the hepatic vein. The hepatic vein has 2 to 3 trunks to collect all blood transported by the hepatic artery and portal vein into the liver, and injected into the inferior vena cava in the inferior vena cava fossa. The main venous branches of hepatic veins are the right hepatic vein, middle hepatic vein, and left hepatic vein; in addition, there are several hepatic small veins that directly collect venous blood from the liver and inject it into the inferior vena cava. There are branches of hepatic veins in hepatic fissures, so when hepatic lobe resection, special attention should be paid to the incision should be a certain distance away from the hepatic fissure, so as not to damage the hepatic veins and cause bleeding.

Chinese name

Hepatic vein

Foreign name

hepatic veins, venae hepaticae

Types of

Left hepatic vein, right hepatic vein, and middle hepatic vein

Brief introduction

Collected from the right posterior lobe of liver (Section , )

Hepatic vein anatomy:

1. Hepatic vein:

Blood from the parenchyma of the liver was collected, including blood returning from the portal vein and hepatic arteries, and gradually collected into 2 to 3 hepatic vein trunks after passing through the capillaries of the liver. The veins from the right lobe of the liver are collected into the right hepatic vein, the square and tail lobe of the liver are collected into the middle hepatic vein, and the left hepatic lobe is collected into the left hepatic vein. They are injected into the inferior vena cava immediately after exiting the liver from the trailing edge of the liver. In addition to the above three main hepatic vein trunks, there are many small veins from the hepatic tail lobe or nearby liver tissue, which are injected directly into the inferior vena cava after hepatic discharge. There is no valve in the hepatic vein, but a small semilunar fold is present at the lower edge of the entrance to the inferior vena cava.

2. Liver:

The liver is the body's largest digestive gland. Located in the right upper abdomen of the human body, the adult weighs about 1500 grams and is divided into left and right leaves. The gallbladder is in front of the right longitudinal groove in the lower part of the liver. The hilum is where blood vessels, hepatic ducts, nerves, and lymphatic vessels enter and exit the liver. Its functions are very complex and diverse, occupying an extremely important position in the body's material metabolism. The main functions are: secretion of bile. Bile can emulsify fat, increase the area of fat decomposition by enzymes, and promote the digestion and absorption of fat; participate in material metabolism. The main effect of the liver on glucose metabolism is to maintain a constant blood glucose concentration; when amino acids absorbed by the digestive tract pass through the liver, 80% of them are used for protein synthesis, deamination, and transamination in the liver; the liver is the hub of fat transport , Can also use sugar and certain amino acids to synthesize fat, cholesterol and phospholipids; and the formation and destruction of red blood cells. The liver can synthesize vitamin B12 necessary for the development and maturation of red blood cells, and the liver is involved in the synthesis of erythropoietin. During the fetal period, the liver is one of the places where red blood cells are generated. After the baby is born, the liver becomes an important place to destroy red blood cells. Macrophages in the liver can swallow aging, damaged or abnormally shaped red blood cells; with plasma proteins and a variety of The synthesis of coagulation factors. All albumin and 80% of globulin in plasma proteins are synthesized in the liver; a variety of coagulation factors such as fibrinogen and prothrombin are also synthesized in the liver. Vitamin K related to blood coagulation and anticoagulated heparin are also synthesized in whole or in part in the liver; related to blood circulation. The liver blood vessels often store a considerable amount of blood, which is one of the blood banks in the body. When the hepatic vein outlet is blocked, a large amount of blood will accumulate in the liver. In severe cases, it will affect the amount of blood returned to the heart and cause blood circulation problems. The liver is the main organ for inactivation of hormones secreted by a variety of endocrine glands, such as adrenal cortex hormones and gonadal hormones, which are inactivated in the liver; detoxification effect. The liver is the body's main detoxifying organ. Toxic substances that are foreign or metabolized in the body must be processed by the liver to become less toxic or highly soluble substances, which are excreted with bile or urine. There are many enzymes related to amino acid metabolism in liver cells, such as alanine aminotransferase (GPT), etc. Under normal circumstances, these intracellular enzymes rarely enter the blood, but when the liver is diseased, the cell permeability increases or the cell When destroyed, these enzymes enter the blood in large quantities, which increases the activity of GPT in the blood. Clinical doctors often use the measurement of serum alanine aminotransferase activity to help diagnose hepatitis.

Hepatic vein and hepatic vein related diseases:

Hepatic vein occlusive disease:

Overview:

Diseases caused by partial or complete occlusion due to endometrial lesions of the central hepatic vein (terminal hepatic vein). There are many causes. The earliest report in Jamaica was caused by the consumption of beverages made of senecio and Crotalaria containing pyrrolizidine. Liver radiation damage, alcoholic liver damage, certain anticancer drugs and immunosuppressive drugs can also be induced. Lesions mainly cause endometrial edema, cell exudation, and collagenization of the liver. Necrosis, fibrosis and hyperemia of surrounding liver cells. Continued development can lead to congestive cirrhosis. Clinical manifestations include liver enlargement, fluid retention, ascites, jaundice, abdominal pain, and encephalopathy. The diagnosis depends on liver biopsy for hepatic vein disease.