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Sphincter of Oddi

Sphincter of Oddi

Interior of the descending portion of the duodenum, showing bile papilla.
MeSH	Oddi's+Sphincter
Dorlands/Elsevier	s_18/12748595

The Sphincter of Oddi, also called the hepatopancreatic sphincter or Glisson's sphincter, controls secretions from the liver, pancreas, and gallbladder into the duodenum of the small intestine.

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It is a sphincter muscle located at the surface of the duodenum. It appears slightly distal to the joining of the common bile duct and pancreatic duct as they enter the descending duodenum and forms from the ampulla of Vater. Bile and pancreatic secretions enter the digestive system through this point. The opening on the inside of the descending duodenum after the sphincter of Oddi is called the major duodenal papilla.

Clinical significance

Endoscopic retrograde cholangiopancreatograms (ERCPs), which are radiographic examinations of the biliary system, often involve assessment of the bile ducts with a esophagogastroduodenoscopy via the sphincter of Oddi before the injection of iodinated contrast medium.

v • d • e Anatomy of torso, digestive system: Digestive glands
Liver	by region: Left lobe (Caudate lobe, Quadrate lobe) - Right lobe - Transverse fissure of liver by function (Fibrous capsule of Glisson, Hepatocyte, Space of Disse, Space of Mall, Kupffer cell, Liver sinusoid, Ito cell, Hepatic lobule) bile ducts: (Bile canaliculus, Canals of Hering, Interlobular bile ducts, Intrahepatic bile ducts, Left and Right hepatic ducts, Common hepatic duct)
Gallbladder	by region (Body, Fundus, Neck) ducts: Cystic duct
Pancreas	by region (Tail, Body, Head, Uncinate process) by function (Islets of Langerhans, Exocrine pancreas) ducts: Pancreatic duct • Accessory pancreatic duct
Common	Common bile duct - Hepatopancreatic ampulla - Sphincter of Oddi