Abdomen Flashcards
(83 cards)
Contents of Transpyloric plane
The transpyloric plane is the midpoint between jugular notch and pubic symphysis
it’s contents include
- Pylorus of stomach
- Fundus of the gallbladder
- Front on the pancreas
- superior mesenteric artery
- splenic vein behind the pancreas
- Hilum of the kidneys
Contents of Transpyloric plane
The transpyloric plane is the midpoint between jugular notch and pubic symphysis
it’s contents include
- Pylorus of stomach
- Fundus of the gallbladder
- Front on the pancreas
- superior mesenteric artery
- splenic vein behind the pancreas
- Hilum of the kidneys
Falciform Ligament is an anterior abdominal peritoneal structure contain
The ligamentum teres ( obliterated portion of the L) umbilical vein)
Borders of the lesser sac and it’s function
- provides a slippery surface for the mobility of the posterior surface of the liver
ant surface: stomach and lesser omentum
Left border: hilum of the spleen
Right border: epiploic foramen
Roof: peritoneum of the caudate lobe of the liver
Floor: Transverse mesocolon
What are the sites of origin of the greater omentum
The greater curvature of the stomach
The lesser omentum covers..
The connection between the liver and lesser curvature of the stomach.
- originates from the R) side of the abdominal esophagus to D1 of the duodenum
- originates at the liver from fissure of ligamentum venosum and porta hepatis
this forms epiploic foramen where, portal triad exists
- portal vein(back)
- hepatic artery(front and left)
- common bile duct(front and right)
Border of the epiploic foramen consists of:
Upper boundary: Caudate lobe of liver
Lower boundary
How are the Peritoneal Compartments separated
There are 3 supracolic spaces and they each have their own subspace
- Supracolic
i. Right upper
ii. Right Lower
iii. Left upper
iv. Left Lower
They are separated by the Transverse Mesocolon
- Infracolic
i. Right/ Upper
ii. Left/ Lower
Pelvic
How is the Infracolic Section of Peritoneum Separated
It is separated via the root of the mesentery which is a 40 degree angle from L-> R
- Starts at the left of the duodojejunal junction and crosses the 3rd part of the duodenum where SMA enters it’s mesentary
What is the Right/Upper infracolic compartment and it’s borders
- Triangular area of peritoneum of the posterior abdominal wall
Apex: Lies in the ileocecal junction
Right side: Ascending colon
Left side: the mesentary of small intestine
Base: attachment of transverse mesocolon
Floor of the triangle consists
- Right kidney
- in the left the duodenum can also be felt
What is the Left/Lower Infracolic Ligament and it’s borders
- It is a quadrilateral shaped space
borders
Sup border: Attachment of the transverse mesocolon between dudodojejunal flexture and the splenic flexure
ascending duodenum lies in this space
lateral end of upper border lies the inferior pole of the L) kidney
floor: IVC and abdominal aorta
at the lower end of infracolic compartment is the sigmoid mesocolonh is A-shaped and the two limbs diverge from each other at the bifurcation of the common iliac vessels,
what is the embryological form of the ligamentum teres
the umbilical vein
in embryology, The liver grows downwards @ the anterior abdominal wall and engulfs….
the ligamentum teres
during embryology, the dorsal stomach rotates into becoming the …. curvature
greater curvature
during embryology, the dorsal stomach rotates into becoming the …. curvature
greater curvature
ORIGIN of the Coeliac Plexus
@ the level of T12 between the crura and the median arcuate ligament. It is flanked by the pre-aortic lymph nodes and surrounded by the sympathetic nerves. It will then devide above the superior border of the pancreas, behind the peritoneum of the lesser sac
Splenic artery will pass through
it runs across the left crus and left psoas to the hilum of the Ieft kidney, where it runs forward in the lienorenal /ligament to the hilum of the spleen.
it gives off 3 branches
i. Arteries to the pancreas
ii. short gastric arteries
iii. left gastroepiploic artery
The common hepatic artery supplies
initially in it’s course it goes downwards and backwards until the lower part of the duodenum and turns upwards into the lesser sac forming the portal triad.
It branches off and gives off the
i. The right gastric
ii. Gastroduodenal–> gastroepiploic
iii. Superior pancreaticoduodenal from branch of gastroduodenal and has posterior and anterior branches and anastomosis with Inferior pancreaticoduodenal branches.
The portal vein has tribituaries from….
i. Left gastric veins
ii. Right gastric veins
iii. right gastroepiploic vein
iv. left gastroepiploic veins
v. Confluence of the superior mesenteric vein and Splenic vein
Where and what is a meckel’s diverticulum
it is at the apex of the physiological hernia during embryology, this is at the vitellointestinal duct at the ileum.
What level is the branch of superior mesenteric artery, it’s course and it’s branches
it’s origin is at the level of L1
It is directed steeply downwards behind the splenic vein @ the head of the pancreas, next to the superior mesenteric vein. passing in front of the L) renal vein and in between the uncinate process, and finally on the third part of the duodenum.
the branches include
i. The inferior pancreaticoduodenal arteries–> ant. and post.
ii. Jejunal branch
iii. Ileal branch
iv. Ileocolic artery- has posterior and anterior branches that communicate
v. right colic artery- ascending and descending branches
vi. middle colic artery
What level is the branch of the inferior mesenteric artery, it’s course and branches
occurs at the level of L3
runs obliquely down the pelvic brim crosses the bifurcation of the iliac arteries at the SI joint
branches
i. sup. rectal artery
ii left colic artery-> ascending and descending branch
iii. sigmoid arteries
What are the lymphatic vessels that lie in front of the aorta
i. Coeliac
ii. Superior mesenteric
iii. Inferior mesenteric
they travel upwards, they are the last in a series of lymph node filters between the guy and cisterna chylii.
Initially, they lie in the follicles in the mucous membrane through the muscle wall of the gut ot nearby nodes.
- juxtaintestinal nodes in the mesentary of the small intestine or paracolic nodes for the large intestine.
- the second group lie along the main blood vessels of the supply and finally to the pre-aortic roots as above
What is the collective nerve supply of the GIT called and it’s plexus. What systems do these nerves recieve
that are collectively called the enteric plexus they consists of:-
- Myenteric plexus(of Auerbach)- in the muscle layers
- Submuous plexus(of Meissner)- in the submucosa
they receive
i. post-ganglionic sympathetic (inhibatory)
ii. pre-ganglionic parasympathetic fibres(excitory)