Duodenal bulb

Duodenal bulb
Duodenal bulb
Gray1050.png
Interior of the stomach. (There is no label for "Duodenal bulb", but the portion of the duodenum labeled at upper left is the duodenal bulb.)
Latin pars superior duodeni, bulbus duodeni
Gray's subject #248 1169

The duodenal bulb is the portion of the duodenum which is closest to the stomach. It normally has a length of about 5 centimeters. The duodenal bulb begins at the pylorus and ends at the neck of the gallbladder.[1] It is located anterior to the liver and the gallbladder, and superior to the pancreatic head. The gastroduodenal artery, portal vein, and common bile duct lie just behind it. The distal part of the bulb is located retroperitoneally. It abuts the Pyloric sphincter.

The duodenal bulb is the place where duodenal ulcers occur. Duodenal ulcers are more common than gastric ulcers and, unlike gastric ulcers, are caused by increased gastric acid secretion. Duodenal ulcers are commonly located anteriorly, and rarely posteriorly. Anterior ulcers can be complicated by perforation, while the posterior ones bleed. The reason for that is explained by their location. The peritoneal or abdominal cavity is located anterior to the duodenum. Therefore, if the ulcer grows deep enough, it will perforate; whereas if a posterior ulcer grows deep enough, it will perforate the gastroduodenal artery and bleed.

Notes

  1. ^ "Normal Findings in Endoscopy: Bulbus Duodeni". GASTROLAB. http://www.gastrolab.net/d1g004.htm. 

External links



Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • duodenal bulb — ampulla duodeni …   Medical dictionary

  • duodenal ampulla — ampulla duodeni [TA] the superior part of the duodenum, often seen only radiographically after a barium meal; called also bulbus duodeni [TA alternative] and duodenal bulb or cap. A true duodenal ampulla is seen in some other mammalian species …   Medical dictionary

  • bulb — 1. Any globular or fusiform structure. SYN: bulbus [TA]. 2. A short, vertical underground stem of plants, such as onion and garlic. [L. bulbus, a bulbous root] aortic b. [TA] the dilated first part of the aorta containing the aort …   Medical dictionary

  • digestive system, human — Introduction  the system used in the human body for the process of digestion. The human digestive system consists primarily of the digestive tract (alimentary canal), or the series of structures and organs through which food and liquids pass… …   Universalium

  • digestive system disease — Introduction       any of the diseases that affect the human digestive tract. Such disorders may affect the esophagus, stomach, small intestine, large intestine (colon), pancreas, liver, or biliary tract. A prevalent disorder of the digestive… …   Universalium

  • Duodenum — This article is about an organ. For Frank Zappa s song, see Duodenum (song). Duodenum Schematic diagram of the gastrointestinal tract, highlighting the duodenum. G …   Wikipedia

  • sphincter — A muscle that encircles a duct, tube, or orifice in such a way that its contraction constricts the lumen or orifice. SYN: musculus s. [TA], s. muscle [TA]. [G. sphinkter, a band or lace] s. of ampulla s. of hepatopancreatic ampulla. anatomic s.… …   Medical dictionary

  • cap — 1. Any anatomic structure that resembles a c. or cover. 2. A protective covering for an incomplete tooth. 3. Colloquialism for restoration of the coronal part of a natural tooth by means of an artificial crown. 4. The nucleotide structure found… …   Medical dictionary

  • Coeliac disease — Classification and external resources Biopsy of small bowel showing coeliac disease manifested by blunting of villi, crypt hyperplasia, and lymphocyte infiltration of crypts ICD 10 …   Wikipedia

  • Sign — Any abnormality that indicates a disease process, such as a change in appearance, sensation, or function, that is observed by a physician when evaluating a patient. * * * 1. Any abnormality indicative of disease, discoverable on examination of… …   Medical dictionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”