Inguinal Region Flashcards
what is the difference between direct and indirect hernias
direct enters inguinal canal via posterior wall through haseslbach’s triangle due to weakened conjoint tendon
indirect enters inguinal canal via deep inguinal ring outside haseselbach’s triangle due to patent process vaginalis
is there an inguinal canal in females
yes
why is the cremater reflex tested
to test that the iliogenital and iliofemoral nerves are working
how do layers of the spermatic cord relate to the layers of the anterior abdominal wall
skin is the same as the skin of the abdominal wall
campers and scarpas fascia fuse to form the darts- fat lost from campers fascia
external spermatic fascia comes from the external obliques
cremaster muscle comes from internal oblique
internal spermatic fascia comes from transversus abdominis
what is the difference between the deep and superficial inguinal rings
superficial inguinal ring- formed by the external oblique
deep inguinal ring- formed by transversus abdominis
what is the origin of tunica vaginalis in the testis?
process vaginalis disappears, but stays to form the layers around the testis
what is the origin of the tunica vaginalis in females
no tunica vaginalis, the process vaginalis regresses in females
if it doesn’t forms the canal of nuck
what are clinical implications of the gubernaculum
guides the testis into the scrotum
if it doesn’t develop fully testis does not descend fully
what does the gubernaculum become in the male
lower part connects the testis to the scrotum
upper part degenerates
what does the gubernaculum become in the female
round ligament of uterus and round ligament of ovary
where do the testis travel during development
through the inguinal canal
what happens if the wall of the inguinal canal is weakened
hernia
what is a hernia
visceral protrusion beyond normal boundaries
what level do gonads develop at and in what space
T12 in retroperitoneal space
what is in the spermatic cord
nerves
vessels
lymphatics
ductus deferens
describe week 6 of testis development
testis in retroperitoneal space with caudal ligament attached to the skin in the scrotal swelling
what becomes the gobernaculum ligament
caudal ligament
describe week 10 of development
testis travels anteriorly in subserous fascia, taking the nerves, vessels and lymphatics with it from T12
describe 7 month development
process vaginalis forms
testis moves into the deep inguinal canal taking wall layers with it
exit through superficial ring
testis pushes into the processes vaginalis which forms the parietal and visceral layers and cavity of tunica vaginalis
describe testis at birth
testis is in scrotum surrounded by tunica vaginalis and the process vaginalis is closed off
what is the role of the gobernaculum
guides the testis into scrotum
what happens if the gobernaculum is incompletely formed
incomplete testis descent
what is cryptorchidism
undescended testis- usually in the inguinal canal
what are consequences of undescended testes
decreased fertility
increased risk of testicular cancer
what part of the process vaginalis remains
tunica vaginalis- lining testes and the cavity
what is patent process vaginalis
failure of close, leaving a communication between the peritoneal cavity and the scrotum
can lead to an indirect hernia
what is a hydrocele
fluid filled sac in the spermatic cord from a weird closing of the process vaginalis
how is a hydrocele distinguished from an undescended testis
light- hydroceles let light through