Clinically applied GI II Flashcards
over 90% of duodenal cancers occur in which part of the duodenum?
ampulla (proximal 2/5)
what is the radiological sign of an anterior perforation of the duodenum?
air under the diaphragm
what is the ligament of Treitz?
suspensory muscle of duodenum
what is the function of the ligament of Treitz?
facilitates movement of chyme from duodenum to jejunum
is an embolus more likely to lodge in the SMA or celiac trunk?
SMA due to oblique course - easier path
intussesception occurs most frequently at which site?
ileocolic
what is the pathogenesis of appendicitis?
lumenal obstruction by fecalith or lymphoid hyperplasia, increasing intraluminal pressure leading to ischemia and invasion of bacteria
a true diverticulum involves what layers?
mucosa, submucosa, muscularis externa
a false diverticulum involves what layers?
mucosa and submucosa
on which side would colon cancer most likely lead to obstruction? why?
left side - smaller diameter and drier due to water absorption
where do diverticuli usually form?
between teniae coli and wherever vessels are entering
what is the most common site of duodenal diverticulum?
part 2 - where bile duct enters
which segment of the colon is most vulnerable to ischemia? why?
critical point of Griffiths - left colic flexure where left marginal artery is normally smallest in diameter
where would you ligate the IMA in open repair of an AAA?
proximal to Arc of Riolan
what is the Arc of Riolan?
aka meandering artery, connecting left middle colic artery (or proximal SMA) and IMA
