Anatomy-Inguinal Canal

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Anatomy-Inguinal Canal
2011-11-07 22:42:02
Inguinal canal

Inguinal canal
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  1. What is covered by layers of abdominal wall?
    • Vas deferens
    • venous drainage-plexus
    • testicular artery
    • lymphatic autonomic n. fibers
  2. attachment of inguinal ligament
    pubic tubercle
  3. what muscle is underneath inguinal ligament and lateral?
    psoas muscle
  4. what is underneath te inguinal ligament and medial?
    arteries, nerves, and veins
  5. Is the inguinal ligament actually a ligament?
    No, it is the free edge of the external oblique muscle
  6. skin layer becomes what in scrotum?
    stays skin layer
  7. Campor's Fascia (superficial fascia Membranous Fatty) becomes what in scrotum?
    Dartos muscle-smooth muscle-works with cremaster muscle
  8. What does Scorpa's Fascia become in scrotum?
    Colle's Fascia
  9. What does External Oblique aponeurosis become in scrotum?
    External spermatic fascia
  10. What does Internal Oblique become in scrotum?
    Cremaster muscle-works with dartos muscle
  11. What does Transversus Abdominis become in scrotum?
    No layer in scrotum
  12. What does transversalis fascia become in scrotum?
    Internal spermatic fascia
  13. What does subperitoneum fat and center become in scrotum?
    center of cord
  14. What does peritoneum become in scrotum?
    process vaginalis
  15. umbilical folds
    median, medial, and lateral
  16. what are the layers of the inguinal triangle?
    inferior epigastric vessels, rectus abdominus sheath, and inguinal ligament
  17. nerves 7-12 lie in plane between?
    • internal oblique and transversus
    • penetrates posterior sheath then anterior sheath and splits
  18. Nerves 7-12 supply?
    rectus muscle
  19. Nerves 7-12 emerge as?
    anterior cutaneous which overlap with lateral cutaneous and anterior cutaneous of other side
  20. Branches of L1 penetrate?
    internal oblique and ASIS and lie between obliques
  21. T6 goes to?
  22. T9 is?
  23. T10 supplies?
  24. L1 is?
  25. T6-T8 ascend and astomose where?
    in rectus abdominis
  26. Descent of testis
    • gubernaculum-attaches undifferentiated gonad to presumptive scrotum or labium majus (before abdominal muscles are present)
    • muscles migrate to surround gubernaculum
    • late in embryonic life-tongue of peritoneum, processus vaginalis, invades scrotum
    • testis follows preformed pathway about time of birth
    • processus seals up leaving cavity in scrotum lined by tunica vaginalis
  27. what part is undifferentiated and is either female or male?
  28. gubernaculum
    attach to gonads and skin
  29. transversus, internal oblique and external oblique
    migrate (linea alba) from somite from back and surround gubernaculum-great slide for processus vagninalis
  30. processus vaginalis seals up and leaves?
    tunica vaginalis (sac)
  31. without androgen processus vaginalis does what?
    continutes to grow-uterus gets stuck-nothing descends through wall and canal is a remnant of gubernaculum-now round ligament of uterus
  32. the best surgical incision is made where?
    • semihorizontal or linea alba
    • semihorizontal: cut across rectus abdominis-can heal up, not much bleeding after tie off and can cut between nerves
    • linea alba-easily done, overlap of nerves-cutaneous nerves, not much bleeding-downfall is tension on sutures
  33. apeneurosis of inguinal canal
    • anterior superior iliac spine to pubic tubercle
    • continuations=lacunar and pectineal ligament
    • continuations attach to pectineal line
  34. medial and lateral crura
    external oblique
  35. conjoined tendon
    • combined fibers of internal oblique and transversus
    • attaches to pectinal line
  36. floor of inguinal canal
    • inguinal ligament
    • lacunar ligament
  37. roof of inguinal canal
    arching fibers of interior oblique and transversus
  38. anterior wall of inguinal canal
    external oblique and internal oblique
  39. posterior wall of inguinal canal
    • conjoined tendon
    • transversalis fascia
  40. superficial inguinal ring
    • not complete opening
    • in external oblique
    • surrounded by medial crus and lateral crus (door post)
  41. if oben external oblique muscle will see?
    deep ring with spermatic cord coming out of deep ring
  42. deep ring=
    funnel of transversalis fascia
  43. superfical ring=
    opening in external oblique aponerosis
  44. coverings of cord
    • external spermatic fascia
    • cremaster
    • internal speramtic fascia
  45. indirect hernia
    follows pathway of processus vaginalis and testis and tends to go into scrotum
  46. direct hernia
    • originates medial to inferior epigastric artery
    • bulges posterior wall of inguinal canal and remains on anterior abdominal wall
    • in medial inguinal fossa or supravesical fossa
    • in supravesical fossa rub up against conjoint tendon-does not go into scrotum
    • *pass through inguinal triangle and stretches conjoint tendon or transversalis fascia lateral to conjoint tendon
  47. if indirect hernias don't get treated what can happen?
    • if untreated long enough can go into scrotum
    • can cause fusion/adhesion of parietal and visceral layers-gut rotation here-occlusion of blood vessels supplying gut-3 days to live
  48. how hernias occur
    • valsalva maneuver-weak spot
    • occurs gradually-why it does not hurt