GI Anatomy - Bleeding in the GI Tract Flashcards
(44 cards)
How many paracolic gutters are there between the lateral edge of the ascending/descending colon and the abdominal wall?
2
The paracolic gutters are part of the _______ and are potential sites for pus or fluid collection
greater sace
What are omental appendices of the colon?
Small pouches of the peritoneum filled with fat and situated along the colon, but are absent in the rectum
What are the teniae coli of the colon?
3 distinct longitudinal bands of thickened smooth muscle, running from the caecum to the distal end of the sigmoid colon
The 3 bands of the teniae coli of the colon come together at the caecum to form?
the appendix
What are hausfrau?
Small pouches formed by sacculation; because the tenure coli are shorter than the intestine, the colon becomes sacculated between them forming hasutra
The caecum and appendix both lie in the?
Right iliac fossae
The appendiceal orifice in the caecum has a _______ to aid with potential closing
Superior/inferior lip
The appendiceal orifice is located?
on the posteromedial wall of the wall of the caecum
The appendiceal orifice corresponds to _______ on the anterior abdominal wall approximately ___ of the way between the _____ to _______-
McBurney’s point
1/3
ASIS (anterior superior iliac spine)
Umbilicus
McBurney’s point is the theoretical area of?
Maximal tenderness of appendicitis
The appendix is typically located?
Behind the caecum (position is variable)
Where does the sigmoid colon lie?
In the LIF
The long sigmoid mesocolon gives the sigmoid colon a?
considerate degree of mobility
What is the risk associated with the considerate degree of mobility of the sigmoid colon?
Risk of twisting during embryological development (sigmoid volvulus) resulting in bowel obstruction and infarction if untreated
The abdominal aorta is a midline retroperitoneal structure anterior to vertebral bodies and left to the?
IVC
What re the midline branches of the abdominal aorta and at which vertebral level do they come off?
Coeliac trunk - T12
SMA - L1
IMA - L3
What are the lateral branches of the abdominal aorta and at which vertebral level do they come off?
Left/right renal artery - L1
Gonadal arteries - L2
Lumbar arteries - L4
What do the lumbar arteries supply?
The posterolateral body wall
The bifurcation of the abdominal aorta into the iliac arteries occurs at which vertebral level?
L4
The common iliac arteries divide into?
external and internal iliac arteries
What are the branches of the SMA (in order)
Inferior pancreaticoduodenal (pancreas/duodenum) Middle colic artery (transverse colon) Right colic artery (ascending colon) Ileocolic branches (ascending colon) Appendicular (runs within mesoappendix)
What do the ileocolic branches of the SMA give off?
Jejunal and ileal arteries
What is a noticeable difference between the jejunal and ideal arteries’ vasa rectae and arcades?
The jejunal arteries have longer vasa rectae and larger & fewer arcades than the ideal arteries
