- C-shaped tube lying around head of pancreas
- first part of small intestine
- first part
- appears as cap on radiographs
- passes upwards, backwards and to right, lying on sloping side of psoas major
- 2nd part
- goes downward from duodenal flexure
- in front of medial part of right kidney to level of 3rd lumbar vertebra
- entry of common bile duct at midpoint; acessory pancreatic duct about 2cm above this
- 3rd part
- goes to left
- crosses psoas, sympathetic trunk, IVC and aorta
- 4th part
- passes upward to level of 2nd lumbar vertebra, duodenojejunal flexure (left of midline,
1cm below transpyloric plane)
- supplied by
- superior pancreaticoduodenal artery from gastroduodenal artery fropm coeliac artery
- inferior pancreaticoduodenal artery from sperior mesenteric arterty
- lymphatics drain to nodes at coeliac artery and porta hepatis
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9.2.1.2.2 Duodenum [Morph]
| Surface markings of the duodenum |
| Duodenum: first (cap), second, third and fourth parts |
| Entry of biliary and pancreatic ducts: duodenal papilla,
sphincter of Oddi. |
| Duodenojejunal flexure. |
Paraduodenal fossa and possible herniae |
| Duodenal ulcers. Relation of duodenum to gall bladder
and pancreas. |
Paraduodenal fold and inferior mesenteric vein |
|