parts of the dudoneum Flashcards
How many pats is the duodenum broken into?
4
Where is the superior (1st) part of the duodenum?
lies anterior to vert body L1
What passes behind the superior (1st) part?
common bile duct
Gastrodudenum artery
portal vein
it is intraperitoneal with a mesentery
Where is the descending (2nd) part of the duodenum?
along side the right of L1-L3
What enters the wall of the descending (2nd) part?
common bile duct
main pancreatic duct
enters posterior medial wall
What does the 2nd descending part hold?
hepatopancreatic ampulla (ampulla of vater)
major duodenal papilla
minor duodenal papilla
Where is the 3rd/horizontal part?
crosses over L3 to the left side
What does the horizontal/3rd part cross over?
IVC
aorta
What is above and below the 3rd/horizontal parts?
SMA - above
IMA - below
What separates the 3rd/horizontal part from the vert column?
right psoas major
IVC
aorta
right gonadals
Where does the 4th/ascending part joins the jejunum?
Joins jejunum at duodenojejunal flexure (root of mesentery)
What secures the 4th/ascending part?
Secured by Ligament of Treitz
What are the parts of the duodenum?
superior
descending
horizontal
ascending
What is the relationship tho the peritoneum is the duodenum?
superior portion is intraperitoneum
rest is secondarily retroperitineal
What is the relationship of the jejunum to the peritoneum?
after the last part the jejunum becomes intraperitoneum
