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1

DEFINITION of inguinal canal

It is an oblique passage in the lower part of the anterior abdominal wall, through which the testis passes in order to leave the abdomen and reach the scrotum.

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LENGTH of inguinal canal

1.5 inch

4 cm

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DIRECTION of inguinal canal

passes downward, forward and medially from deep to superficial ring

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SITE of inguinal canal

It lies parallel to the medial half of the inguinal ligament.

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BEGINNING of inguinal canal

DEEP ( INTERNAL) INGUINAL RING

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DEEP ( INTERNAL) INGUINAL RING

Definition

Site

Boundaries

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Definition of DEEP ( INTERNAL) INGUINAL RING

It's an oval opening "vertical longitudinal axis" in the fascia transversalis

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Site of DEEP ( INTERNAL) INGUINAL RING

* 1/2 inch above the mid point of inguinal ligament

* just lateral to the inferior epigastric artery.

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Boundaries of DEEP ( INTERNAL) INGUINAL RING

* Above and lateral Boundaries

* Below and medial Boundaries

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* Above and lateral Boundaries of DEEP ( INTERNAL) INGUINAL RING

The arched lower margin of fascia transversalis.

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Below and medial Boundaries of DEEP ( INTERNAL) INGUINAL RING

The inferior epigastric vessels

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END of inguinal canal

SUPERFICIAL (EXTERNAL) INGUINAL RING

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SUPERFICIAL (EXTERNAL) INGUINAL RING

* Definition

* Site

* Attachements

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Definition of SUPERFICIAL (EXTERNAL) INGUINAL RING

Triangle opening in external oblique aponeurosis

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Site of SUPERFICIAL (EXTERNAL) INGUINAL RING

1/2 inch above and medial to the pubic tubercle

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Attachements of SUPERFICIAL (EXTERNAL) INGUINAL RING

* The medial "superior" crus

* The lateral "inferior" crus

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The medial "superior" crus in Attachements of SUPERFICIAL (EXTERNAL) INGUINAL RING

attached to the front of symphysis pubis

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The lateral "inferior" crus in Attachements of SUPERFICIAL (EXTERNAL) INGUINAL RING

* Stronger

* Inserted into the pubic tubercle

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Boundaries of the inguinal canal

* ANTERIOR WALL

* POSTERIOR WALL

* ROOF

* FLOOR

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ANTERIOR WALL Boundaries of the inguinal canal

1- External oblique aponeurosis along its whole length.

2- Strengthened laterally by fleshy fibres of internal oblique muscle originating from the lateral 1/2 of the inguinal ligament.

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POSTERIOR WALL Boundaries of the inguinal canal

1. Fascia transversalis along its whole length.

2. Conjoint tendon (also known as inguinal falx) along its medial 1/2

3. Reflected part of inguinal ligament along its medial 1/4

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Alternative name for Conjoint tendon in POSTERIOR WALL Boundaries of the inguinal canal

inguinal falx

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composition Conjoint tendon in POSTERIOR WALL Boundaries of the inguinal canal

Arched fibers of Internal oblique muscle and transversus abdominis

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ROOF Boundaries of the inguinal canal

Arched fibres of conjoint muscle

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FLOOR Boundaries of the inguinal canal

Upper grooved surface of medial 1/2 of inguinal ligament

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Inguinal ligament

Definition

Attachments

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Definition of Inguinal ligament

It's the lower free border of external oblique aponeurosis

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Attachments of Inguinal ligament

attached to pubic tubercle medially and ASIS laterally

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CONTENTS OF THE Inguinal CANAL

(A) Ilio-inguinal nerve (L1)

(B) Spermatic cord :

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Ilio-inguinal nerve in CONTENTS OF THE Inguinal CANAL

Origin

Course

Sensory supply

Motor supply