Wednesday, July 05, 2006

Ampulla of Vater

Ampulla of Vater
From Wikipedia, the free encyclopedia

Ampulla of Vater
The ampulla of Vater (Latin: papilla Vateri, papilla duodeni major), also known as the hepatopancreatic ampulla, is formed by the union of the pancreatic duct and the common bile duct. The ampulla is specifically located at the major duodenal papilla.


One important thing to note about the Ampulla of Vater is that its entrance point, halfway along the second part of the duodenum, marks the anatomical transition from foregut to midgut (and hence the point where the celiac trunk stops supplying the gut and the superior mesenteric artery takes over).


























Biliary system

Latin
a. hepatopancreatica
Gray's
subject #250 1199
MeSH
Ampulla+of+Vater
Dorlands/Elsevier
a_32/12127886




Function


Various smooth muscle sphincters regulate the flow of bile and pancreatic juice through the ampulla: the sphincter of the pancreatic duct, the sphincter of the bile duct, and the hepatopancreatic sphincter (Sphincter of Oddi).

The Sphincter of Oddi controls the introduction of bile and pancreatic secretions into the duodenum, as well as preventing the entry of duodenal contents into the Ampulla.

Related disorders
Pancreatitis can result from a failure of pancreatic secretions to drain properly. One possible cause of impaired drainage of pancreatic juice is blockage of the hepatopancreatic ampulla. A common culprit to cause blockage is a gallstone in the common bile duct.

Eponym
The eponymical term "ampulla of Vater" is named after Abraham Vater (1684-1751), a German anatomist who first published a description of it in 1720.[1]


Additional images

The pancreatic duct.









References
^ synd/3098 at Who Named It
"Ampulla, hepatopancreatic." Stedman's Medical Dictionary, 27th ed. (2000). ISBN 0-683-40007-X
Moore, Keith L. and Arthur F. Dalley. Clinically Oriented Anatomy, 4th ed. (1999). ISBN 0-683-06141-0
[hide]
vdeAnatomy of torso, digestive system: accessory digestive glands
Liver
by region: Left lobe (Caudate lobe, Quadrate lobe) • Right lobeTransverse fissure of liverBare area of the liverby function: Fibrous capsule of GlissonHepatocyteSpace of DisseSpace of MallKupffer cellLiver sinusoidIto cellHepatic lobule
Biliary tract
Bile ducts
intrahepatic: Bile canaliculusCanals of HeringInterlobular bile ductsIntrahepatic bile ductsLeft and Right hepatic ductsextrahepatic: Common hepatic ductCystic ductCommon bile duct
Gallbladder
by region: BodyFundusNeck
Pancreas
by region: TailBodyNeckHeadUncinate process
by function: Islets of LangerhansExocrine pancreasducts: Pancreatic ductAccessory pancreatic duct
Common
Hepatopancreatic ampullaSphincter of Oddi
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Categories: Abdomen Digestive system

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