What Is the Biliary System?

The biliary system mainly includes the gallbladder, common hepatic duct, and common bile duct. The gallbladder is pear-shaped and is located in the front of the right longitudinal groove below the liver. It is connected to the common bile duct by the gallbladder. Bow junction. The left and right hepatic ducts of the left and right livers merge into the common hepatic duct after exiting the hepatic hilum. The common bile duct is about 6 to 8 cm in length and descends behind the duodenal bulb and pancreatic head within the hepatoduodenal ligament. The end merges with the pancreatic duct and expands into a ampulla. Part, surrounded by Odie's sphincter at the opening.

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Biliary system mainly includes

Biliary system dynamics

Biliary system dynamics are more complex, including

Biliary system movement disorders

Common bile duct

Examination of biliary dysfunction

Oral gallbladder contrast agent

Can understand the gallbladder development and judge the function of gallbladder contraction and emptying by fat meal test.

Abdominal ultrasound

Not only can measure the gallbladder volume, bile and pancreatic duct diameter, but also use the fat meal or CCK stimulation to observe the bile excretion. Under normal circumstances, after the fat meal or CCK injection, Oddi sphincter relaxes, the diameter of the pancreaticobiliary duct decreases or no expansion Inverse widening of diameter 2mm, indicating Oddi sphincter dysfunction

Endoscopic retrograde cholangiopancreatography can not only observe the structural abnormalities of the bile ducts, gallbladder, pancreatic ducts, and nipples, but also clear the emptying of the contrast agent.

Oddi sphincter pressure measurement can understand the bile and pancreatic duct pressure, Oddi sphincter basal pressure; Oddi sphincter contraction amplitude, frequency, time; Oddi sphincter basal contraction transmission direction.

Radionuclide and single-photon emission computer computed tomography can understand the liver-duodenal bile fluid transport time.

Magnetic resonance imaging of the pancreaticobiliary duct can reveal the presence or absence of Oddi sphincter dysfunction.

In short, the motor function of the biliary system is a complex issue, and the coupling between interdigestive MMC and gallbladder contraction still needs to be evaluated. The role of gastrin in the control of gastric phase is still debated. The interaction of neurohormones such as the two mediators The effects are additive or intensified. In addition, whether these effects change the release or direct interaction of gastrointestinal hormones through nerves needs further study. The biliary system also lacks comprehensive, inexpensive, and simple examination methods for its motor abnormalities. It is also difficult to make a comprehensive and accurate diagnosis. So research in this area is still very meaningful to guide the treatment.