Abdomen Flashcards
External oblique muscle orientation
obliquely downward and medially
Internal oblique muscle orientation
upward and medial
conjoint tendon
aponeurotic fibers of internal oblique and trnsversus abdominis
function of pyramidalis muscle
tenses linea alba
It is a cresentic border on the posterior wall; midway between umbilicus and pubic crest
arcuate line
Contents of rectus sheath (5)
- rectus abdominis
- pyramidilis
- superior epigastric vessels
- inferior epigastric vessels
- lower 5 intercostal and subcostal vessels and nerves
Blood supply of abdomen
- superior epigastric vessels
- inferior epigastric vessels
- deep circumflex iliac
Venous drainage of abdomen
- superior epigastric vein
- inferior epigastric vein
- deep circumflex iliac vein
Nerve supply of abdomen
ventral rami of the lower 6 thoracic nerves and first lumbar nerve
Hesselbach’s triangle boundaries
- superior and lateral - inferior epigastric artery
- inferior and lateral - inguinal ligament/poupart’s ligament
- medial - rectus abdominis
Nerve that cause numbness on the skin after herniorrhaphy
ilioinguinal nerve
Boundaries of inguinal canal
anter - external oblique muscle aponeurosis
post - transversalis fascia and conjoint tendon
sup - inferior oblique and transversus abdominis
inferior - inguinal ligament
A hernia that is lateral to the inferior epigastric vessels
Indirect Inguinal Hernia
A hernia that is mediall to the inferior epigastric vessels
Direct Inguinal Hernia
A hernia covered by peritoneum and layers of spermatic cord
Indirect Inguinal Hernia
A hernia covered by exxternal spermatic fascia
Direct Inguinal Hernia
Derivative of skin
skin
Derivative of external oblique
external spermatic fascia
Derivative of internal oblique
cremasteric muscle
Derivative of transversalis fascia
interna spermatic fascia
Derivative of transversus abdominis
none
Derivative of extreperitoneal fat
none
Derivative of peritoneum
tunica vaginalis
Cremasteric Reflex
sensory and motor fibers in ventral rami of L1
What nerve is stimulated in cremasteric refflex
sensory fiber of ilioinguinal nerve
motor fiber of genitofemoral nerve
What are the peritoneal organs
- esophagus
- stomach
- 1st part of duodenum
- ileum
5 cecum and appendix - transverese colon
- sigmoid colon
- superior rectum
9 liver, biliary tree - spleen
what are the Retroperitoneal organs
- kidney
- ureter
- urinary bladder
- uterus
- fallopian tube
- aorta
- IVC
8 suprarenal glands - 2nd to 4th duodenum
- pancreas
- ascending colon
- descending colon
- middle rectum
.What is the extraperitoneal organ
- inferior rectum
a communication between the greater and lesser sac
foramen of winslow
boundaries of foramen of winslow
ant - hepatoduodenal ligament; portal triad
post - IVC
inferior - superior part of duodenum
superior - caudate lobe of liver
These are extensions of the visceral peritoneum
peritoneal reflections
abdominal policeman
greater omentum
parts of greater omentum
- gastrophrenic
- gastrosplenic
- gastrocolic
parts of lesser omentum
- hepatogastric
2. hepatoduodenal
what is clamped during a pringle’s maneuver
hepatoduodenal ligament
What are the contents of hepatoduodenal ligament
- hepatic artery lying anterior and left
- common bileduct lying anterior and right
- portal vein lying posterior
Anterior unpaired branches of abdominal aorta
- celiac trunk
- superior mesenteric
- inferior mesenteric
Anterior paired branches of the abdominal aorta
- suprarenal
- renal
- gonadal
Lateral paired branches of abdominal aorta
- inferior phrenic
2. lumbar
terminal branches of abdominal aorta
- comon iliac
2. median sacral (unpaired/posterior)
Branches of the celiac artery
- left gastric
- splenic
a. left gastroepiploic
b. short gastric
3.hepatic
a. right gastric
b. right and left hepatic
c. gastroduodenal
>right gastroepiploic
>superior pancreaticoduodenal
Where is celiac artery in relation to vertebral column
T12
where is the superior mesenteric artery in relation to vertebral column
L1
What are the branches of the superior mesenteric artery
- inferior pancreaticoduodenal
- middle colic
- right colic
- ileo colic
- jejunal ileal
What are the branches of the inferior mesenteric artery
- left colic
- sigmoid
- superior rectal
Where is the inferior mesenteric artery in relation to the vertebral column
L3
Supply of Foregut
Celiac Trunk
Supply of Midgut
Superior mesenteric artery
Supply of hindgut
Inferior mesenteric artery
endodermal origin of duodenum
2nd part
proximal - foregut
distal - midgut
endordermal origin of transverse colon
upper 2/3 - midgut
lower 1/3 - hind gut
endodermal/ectodermal origin of anal canal
upper part - hind gut
lower part - protoderm - ectoderm
anterior visceral branch of IVC
- right hepatic
2. left hepatic
Lateral viscerl branch of IVC
- right suprarenal
- right and left renal
- right gonadal
Lateral abdominal branch of IVC
- inferior phrenic
2. lumbar
Veins of origin of IVC
- right and left common iliac
2. median sacral
Origin of portal vein
- superior mesenteric vein
2. splenic vein
Tributaries of portal vein
- left gastric vein
- right gastric vein
- cystic vein
- posterior superior pancreaticoduodenal vein
Drainage of right and left hepatic veins
IVC
drainage of right gonadal and right suprarenal vein
IVC
drainage of left gonadal and left suprarenal vein
left renal vein
drainage of right gastroepiploic vein
SMV
drainage of left gastroepiploic vein
splenic vein
drainage of right colic vein
SMV
drainage of left colic vein
IMV
Portal Venous System Tributaries
- suerior mesenteric vein
- splenic vein
- inferior mesenteric vein
- left gastric vein
- para umbilical vein
Collateral branches if portal venous system is blocked
- esophageal branch of left gastric to esophageal of azygous
- superior rectal to middle and inferior rectal
- paraumbilical to superficial veins of anterior abdominal wall
- colic veins to retroperitoneal veins