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The duodenal bulb (also ampulla of duodenum, duodenal ampulla, or duodenal cap) is the initial, dilated portion of (the superior part of) the duodenum [1] just distal to the stomach; it begins at the pylorus and ends at the neck of the gallbladder. It is normally about 5 centimeters long. [2]
The pylorus is considered as having two parts, the pyloric antrum (opening to the body of the stomach) and the pyloric canal (opening to the duodenum). The pyloric canal ends as the pyloric orifice, which marks the junction between the stomach and the duodenum. The orifice is surrounded by a sphincter, a band of muscle, called the pyloric ...
The first part, or superior part, of the duodenum is a continuation from the pylorus to the transpyloric plane. It is superior (above) to the rest of the segments, at the vertebral level of L1. The duodenal bulb, about 2 cm (3 ⁄ 4 in) long, is the first part of the duodenum and is
On abdominal X-rays, the small intestine is considered to be abnormally dilated when the diameter exceeds 3 cm. [8] [9] On CT scans, a diameter of over 2.5 cm is considered abnormally dilated. [ 8 ] [ 10 ] The surface area of the human small intestinal mucosa , due to enlargement caused by folds, villi and microvilli, averages 30 square metres ...
The gastroduodenal artery can be the source of a significant gastrointestinal bleed, which may arise as a complication of peptic ulcer disease.Because of its close relationship to the posteromedial wall of the second part of the duodenum, deeply penetrating ulcers or tumours of the duodenum may cause torrential bleeding from the gastroduodenal ‘artery of haemorrhage'. [1]
Increased blood pressure in the portal vein, called portal hypertension, is a major complication of liver disease, most commonly cirrhosis. [7] A dilated portal vein (diameter of greater than 13 or 15 mm) is a sign of portal hypertension, with a sensitivity estimated at 12.5% or 40%. [ 8 ]
Despite their awkward appearance, the platypus has a superpower-like sixth sense that it uses to hunt They are such an unusual mammal that the first scientists to study them believed they were the ...
Mesentery in red. Dorsal mesentery is the lower part of the circuit. The upper part is ventral mesentery. Abdominal part of digestive tube and its attachment to the primitive or common mesentery. Human embryo of six weeks. Schematic figure of the bursa omentalis, etc. Human embryo of eight weeks.