Duodeno

duodeno it is the first portion of .

• Limits: The duodeno begins in píloro, that separates it of and finishes in the duodenoyeyunal angle or angle of Treitz, that separates it of yeyuno.
• Situation: The duodeno is located in the superior and later part of the abdomen, in retroperitoneo, being the only portion of the thin intestine that is it fixes.
• Length: The duodeno term comes from the Latin duodenum digitorum because the old anatomists said that she measured twelve fingers, she is to say about 18 centimeters.
• Portions of the duodeno: The duodeno tien a form of C describing four angles of approximately 90 degrees, that include/understand four portions that are:
  • First portion of the duodeno: It is a horizontal portion that goes towards the right from píloro to the neck of biliary vesicle, to the height of second lumbar. It is the typical region of duodenal ulcer.
  • Second portion of the duodeno: It is a vertical portion that goes downwards, surrounding the right edge by the head of . At this portion they end colédoco and the pancreático conduit or conduit of Wirsung. It is the portion that usually is obstructed in the cases of cancer of páncreas.
  • Third portion of the duodeno: It is a horizontal portion that goes towards the left, below the superior mesentéricos glasses and of artery aorta. It is the typical zone of traumatic crushing of against (puñetazo).
  • Fourth portion of the duodeno: It is again a vertical portion that goes upwards, by the left edge of the spine, from fourth to the second lumbar vertebra, where it finishes in the angle of Treitz.