Anatomy of the Lateral Pelvic Wall and a Pelvic Mass Flashcards
what does the obturator internus touch?
obturator membrane
superior pubic ramus
where is the obturator foramen located?
opening between the ischium and pubic bones
what is deep to the levator ani?
ischioanal fossa
what muscle covers the sacrospinous ligament?
coccygeus
what muscle splits the greater sciatic foramen in 2 parts?
piriformis
majority of pelvic and perineal arteries arise from what artery?
internal iliac artery
what arteries do NOT arise from the internal iliac artery?
gonadal artery
superior rectal artery
superior rectal artery arises from what artery?
it’s a continuation of the inferior mesenteric
the gonadal artery arises from what level of the abdo aorta?
L2
what covers the obturator foramen?
obturator membrane
middle and inferior rectal veins drain more into the portal/caval system
caval
superior rectal veins drain more into the portal/caval system
portal
what arteries make up the posterior division of the pelvic arterial supply?
PILS posterior iliolumbar lateral sacral superior gluteal
the gluteal arteries are split by what muscle?
piriformis
what artery makes up the “circle of death” in hernia repairs?
a pubic branch of the inferior epigastric artery that anastamoses with the obturator artery
name the structures that make up the lateral, medial and median umbilical folds
lateral - inf epigastric vessels
medial - remnant of umbilical artery
median - urachus
the perineal artery of the male forms what artery?
continues to become the posterior scrotal artery
the internal pudental artery gives off what branches in men?
perineal artery
dorsal artery of penis
deep artery
anterior scrotal artery is a branch of…
external pudental artery (branch of femoral)
what artery of the male pelvis (NOT perineum) is not present in the female
inferior vesical artery (replaced by cervical artery)
what arteries of the female pelvis (NOT perineum) are not present in the male
vaginal
uterine
the vaginal artery is a branch of…
uterine artery
name the arterial anastamoses present in the female pelvis?
uterine artery and ovarian artery
uterine artery and vaginal artery
name the 2 branches of the ovarian artery
tubal
ovarian
the uterine artery runs adjacent/parallel to the ureter
adjacent NB water under the bridge
the vaginal artery runs adjacent/parallel to the ureter
parallel
main artery to the clitoris
dorsal artery of the clitoris
what artery supplies the branches to the female perineum? what are these branches?
internal pudental artery;
inferior rectal
perineal -> labial
dorsal artery of clitoris
main venous drainage of the pelvis?
internal iliac vein from various venous plexuses
sciatic nerve exits below what muscle?
piriformis
what pelvic lymph node groups form a T shape? what way do they lie
superfical inguinal - horizontal
deep inguinal - vertical
primary lymphatic drainage of the superior pelvic viscera (above pelvic pain line)
external iliac nodes
primary lymphatic drainage of the inferior pelvic viscera (below pelvic pain line)
internal iliac nodes
primary lymphatic drainage of the superficial perineum
superficial inguinal nodes
describe the route from the inguinal nodes up the lymphatic system
to common iliac -> aortic -> thoracic duct -> venous system
