Inguinal Canal Flashcards
What is the inguinal ligament attached to?
ASIS and pubic tubercule
What is the inguinal ligament?
rolled-under border of EOM aponeurosis
–>forms outer edge of inguinal canal
What is the conjoint tendon/ inguinal falx?
aponeurosis of IOM and transversus abdominis M
Where does the conjoint tendon insert?
pubis
What is the external opening within aponeurosis for spermatic cord/round ligament of uterus?
Superficial ring
What crural fibers are involved in the inguinal canal area (define the superficial ring)?
Medial crus
Lateral crus
Intercrural fibers
What is the ligament that anchors the inguinal ligament to pubis?
Lacunar ligament
–> between pubic rami and inguinal ligament
What ligament is a continuation of fibers from lacunar ligament running along the pectin pubis?
Pectineal ligament
What is the femoral canal in relation to the inguinal canal?
immediately lateral to lacunar ligament
What is the difference between the crural fibers and ligaments of inguinal canal?
Lacunar/pectinate ligaments attach inguinal ligament to pubic bone
Crural fibers are etensions of aponeurosis that form the boundary of superficial inguinal ring
What is the function of the conjoint tendon?
supports weak spot in the abdominal wall where the inguinal canal is
What occurs with weakened conjoint tendon?
Direct hernia
Where is the conjoint tendon in relation to the inguinal canal?
makes up posterior portion of canal
What is superior to inguinal ligament and lateral to inferior epigastric artery?
deep ring of inguinal canal
What begins the invagination of peritoneum into transversalis fascia?
deep ring of inguinal canal
What is essentially a partial split in the EOM aponeurosis?
Superficial ring of inguinal canal
–>defined by crural fibers
What is thickening of transversalis fascia posterior to inguinal ingament?
iliopubic tract
What innervates the skin above pubis, motor to IO and TA?
Iliohypogastric N
What nerve transverses inguinal canal and exits superficial ring LATERAL to cord?
Ilioinguinal N
Where does the ilioinguinal nerve exit inguinal canal r/t spermatic cord?
exits LATERAL to cord
What nerve is motor to the cremasteric muscle?
Genital branch of genitofemoral N
What does the gubernaculum connect?
gonads to future scrotal swellings
What is an out-pocketing of peritoneal cavity into future scrotum?
Processus vaginalis
What is the remains of the processus vaginalis around testes?
tunica vaginalis
–>represents closed connection to peritoneum
What layers of abd wall are carried in the spermatic cord?
Transversalis fascia
IOM
EOM
What is cryptorchid testis?
undescended testis
What does cryptorchid testis cause increased risk of?
testicular cancer
Abdominal muscle layers make up testicle/ spermatic cord EXCEPT?
Transversus abdominis M
–>fascia is but not the actual muscle
What does the transversalis fascia make in r/t spermatic cord?
internal spermatic fascia
What does the IOM make in r/t spermatic cord?
Cremasteric M
What does the EOM make in r/t spermatic cord?
External spermatic fascia
What is in the spermatic cord?
Vas deferens
testicular A and V
——->pampiniform plexus
gonadal N and lymph
What is a testicular varicocele?
Varicosities of pampiniform plexus
——>swelling in scrotum with dull and recurring pain
What is a persistent processus vaginalis?
patent connection b/t tunica vaginalis and abdomen
What is a hydrocele?
peritoneal fluid accumulated within tunica vaginalis
What is a hematocele?
accumulation of blood in tunica vaginalis
What is the tunica albuginea?
directly covers testes, covered by visceral layer of tunica vaginalis
How do you detect hydrocele vs hematocele?
hydroillumination
–> light shines through fluid of hydrocele
What does the gubernaculum form in ovarian descent?
Ovarian Ligament and Round Ligament of Uterus
What ligament attaches to labial swellings after it exits the inguinal canal?
Round ligament of uterus
What is contained in the female inguinal canal?
Round L of uterus
Ilioinguinal N
Geniofemoral N (genital branch)
Where does lymph drain to from scrotum?
Superficial inguinal nodes–> iliac and lymbar LN
Where does lymph from the testes drain?
directly into lumbar and pre-aortic LN
What is the remnant of the urachus?
median umbilical fold/L of ant abd wall
What is the remnant of distal umbilical As?
medial umbilical L/fold of ant abd wall
What fold is due to the inferior epigastric A and V in the post aspect of ant abd wall?
Lateral umbilical fold/L
–>hypotenuse of inguinal triangle (d/t angle of travel of inferior epigastric A)
What is the function of the iliopubic tract?
reinforces floor of inguinal canal
What is Hasselbach’s Triangle?
Inguinal Triangle:
- inguinal L
- lateral border of rectus abdominis M
- Lateral umbilical fold
Where is a direct hernia in relation to the inguinal triangle?
inferior to conjoint tendon
medial to lateral umbilical fold
What type of hernia enters the deep inguinal ring?
indirect hernia
What hernia has peritoneum WITHIN the spermatic cord?
indirect hernia
What type of hernia is peritoneum or transversalis fascia ALONGSIDE the spermatic cord?
direct hernia
What hernia occurs below the inguinal ligament?
femoral hernia
What hernia is more common in women?
femoral hernia
–>emergency d/t strangulation
What type of hernia is due to defects in posterolateral abdominal wall (abd tissues protrudes)?
Flank/Lubar
What hernia goes through fascia between abd muscles, along semilunar line of rectus abdominis M?
Spigelian