Common bile duct
| Common bile duct | |
|---|---|
 Diagram of the biliary tree showing the common bile duct | |
| Details | |
| Identifiers | |
| Latin | ductus choledochus |
| Acronym(s) | CBD |
| MeSH | D003135 |
| TA98 | A05.8.02.013 |
| TA2 | 3103 |
| FMA | 14667 |
| Anatomical terminology | |
2. Intrahepatic bile ducts
3. Left and right hepatic ducts
4. Common hepatic duct
5. Cystic duct
6. Common bile duct
7. Ampulla of Vater
8. Major duodenal papilla
9. Gallbladder
10–11. Right and left lobes of liver
12. Spleen
13. Esophagus
14. Stomach
15. Pancreas:
16. Accessory pancreatic duct
17. Pancreatic duct
18. Small intestine:
19. Duodenum
20. Jejunum
21–22. Right and left kidneys
The front border of the liver has been lifted up (brown arrow).[1]
The common bile duct, sometimes abbreviated CBD,[2] is a duct in the gastrointestinal tract of organisms that have a gall bladder. It is formed by the union of the common hepatic duct and the cystic duct (from the gall bladder). It is later joined by the pancreatic duct to form the ampulla of Vater. There, the two ducts are surrounded by the muscular sphincter of Oddi.
When the sphincter of Oddi is closed, newly synthesized bile from the liver is forced into storage in the gall bladder. When open, the stored and concentrated bile exits into the duodenum. This conduction of bile is the main function of the common bile duct. The hormone cholecystokinin, when stimulated by a fatty meal, promotes bile secretion by increased production of hepatic bile, contraction of the gall bladder, and relaxation of the Sphincter of Oddi.
Several problems can arise within the common bile duct. If clogged by a gallstone, a condition called choledocholithiasis can result.[3] In this clogged state, the duct is especially vulnerable to an infection called ascending cholangitis. Very rare deformities of the common bile duct are cystic dilations (4 cm), choledochoceles (cystic dilation of the ampula of Vater (3–8 cm), and biliary atresia.
Additional images
-
Dilatation of CBD due to Ampullary tumor. -
The gall-bladder and bile ducts laid open.
References
- ^ Standring S, Borley NR, eds. (2008). Gray's anatomy : the anatomical basis of clinical practice. Brown JL, Moore LA (40th ed.). London: Churchill Livingstone. pp. 1163, 1177, 1185–6. ISBN 978-0-8089-2371-8.
- ^ Agabegi, Steven S.; Agabegi, Elizabeth D. (23 August 2012). Step-Up to Medicine. Lippincott Williams & Wilkins. p. 136. ISBN 9781609133603.
- ^ Humes, H. David (2001). Kelley's Essentials of Internal Medicine. Lippincott Williams & Wilkins. p. 229. ISBN 978-0781719377.
- S.E.Miederer et al.:Endoscopic transpapillary splitting of a choledochocele. Dtsch Med. Wochenschr. 1978 Feb.3:103(5):216,219. PMID 631041
External links
- Anatomy figure: 38:06-08 at Human Anatomy Online, SUNY Downstate Medical Center - "The gallbladder and extrahepatic bile ducts."
- Anatomy image:8336 at the SUNY Downstate Medical Center
- Anatomy image:7957 at the SUNY Downstate Medical Center
- liver at The Anatomy Lesson by Wesley Norman (Georgetown University) (biliarysystem)
