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Anatomy GIT 206 > AAW: Inguinal Canal > Flashcards

AAW: Inguinal Canal Flashcards

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1
Q

Describe the formation of the Inguinal Canal

A

Passage of Processus vaginalis which is a peritoneal process through layers of lower part of Anterior Abdominal Wall during intrauterine life

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2
Q

Site of inguinal canal

A

Above the medial 1/2 of Inguinal Ligament, between Deep(internal) inguinal ring & Superficial(external) inguinal ring

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3
Q

length of inguinal Canal

A

4cm long

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4
Q

Direction of inguinal Canal

A

Downwards forewards and medial

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5
Q

Beginning of Inguinal Canal is formed by

A

Deep (Internal) Inguinal Ring

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6
Q

End of Inguinal Canal is formed by

A

Superficial (External) Inguinal RIng

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7
Q

Shape of Deep (Internal) inguinal Ring

A

Oval

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8
Q

Site Of Deep (internal) inguinal Ring

A

in Fascia Transversalis, 1/2 inch above mid-inguinal point & Lateral to inferior Epigastric A

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9
Q

Extension of Deep (internal) inguinal Ring

A

Internal Spermatic Fascia

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10
Q

Shape of Superficial (external) Inguinal Ring

A

Triangular

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11
Q

Site of Superficial (external) Inguinal Ring

A

It’s an opening of Aponeurosis of External Abdominal Oblique , located Above and medial to pubic tubercle

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12
Q

Describe the boundaries of Superficial (external) inguinal Ring

A
  • Medial Crus: attached to Symphysis pubis & intercrural fibers
  • Lateral Crus: attached to Pubic tubercle & Intercrural fibers
  • Base: fromed by pubic crest
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13
Q

Extensions of Margins of Superficial (External) inguinal ring

A

External Spermatic Fascia

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14
Q

which structure passes through Superficial (external) inguinal Ring but not Deep (internal) inguinal ring/ enters inguinal canal not through deep (internal) inguinal Ring

A

Ilioinguinal N, it perices the fleshy fiber of Internal Abdominal Oblique & enters the canal

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15
Q

Anterior wall of inguinal Canal

A
  • Whole length: external Abdominal oblique
  • Lateral 1/2: + lower fleshy fiber origin of Internal Abdominal Oblique
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16
Q

Posterior wall of Inguinal Canal

A
  • Along whole length: Fascia transversalis
  • medial 1/2: +Conjoint tendon
  • Medial 1/4: + Reflected part of inguinal Ligament (in front of conjoint tendon)

Lateral 1/2 of post. wall of canal = fascia transversalis only

17
Q

Roof of Inguinal Canal

A

Arch of lower fleshy part of Internal Abdominal Oblique & Transversus Abdominus

18
Q

Floor of Inguinal Canal

A

Upper concave surface of Inguinal Ligament
* Medial 1/2: + lacunar ligament

19
Q

Enumerate contents of Inguinal Canal

A
  • Spermatic cord and its coverings
  • Ilio-inguinal N
20
Q

Explain why inguinal canal is a weak area

A
  • Presents of Inguinal rings (internal & external)
  • presence of area in Anterior wall with no reinforcement (medial 1/2 formed by external oblique aponeurosis only)
  • Presence of Area in posterior wall with no reinforcement (lateral 1/2 formed only by fasica transversalis)
  • Spermatic cord pasess between the layers of Abdominal wall
21
Q

Explain how Weakness of Inguinal Canal is compensated

A
  1. Shutter mechanism: Contraction of internal abdominal oblique during coughing/straining, causing it to lose concavity and close the canal
  2. Valvular mechanism: the 2 rings ar not in front of each other
  3. Increased intra-abdominal pressure: forces posterior wall against anterior wall,closing the external inguinal ring
  4. superficial (external) ring is compensated by Conjoint tendon & reflected part of inguinal ligament at posterior wall of canal
  5. Deep (internal) ring is compensated by lower fleshy origin of internal abdominal oblique in anterior wall of canal
  6. Intercrural fibers
  7. cremastric reflex
22
Q

Medial wall of Inguinal triangle (hasselbach’s triangle)

A

Lateral border of rectus abdomius

23
Q

Lateral wall of Hasselbach’s triangle (inguinal)

A

Inferior Epigastric vessels

24
Q

Inferior border of Hasselbach’s (inguinal) triangle

A

Inguinal ligament

25
Q

Floor of Hasselbach’s (inguinal) Triangle

A
  • Parietal peritoneum
  • Extra-peritoneal tissue & fat
  • Fascia transversalis
  • Conjoint tendon & reflected part inguinal ligament
26
Q

Hasselbach’s (inguinal) Triangle is divided into medial and lateral subdivisions by

A

Obliterated umblilical A (lateral Umbilical ligament)

Anatomy GIT 206 (26 decks)

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