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Inguinal Canal

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Topic updated on 06/27/16 7:18am

Overview
  • Inguinal rings
    • internal (deep) inguinal ring lies in transversalis fascia, just lateral to the inferior epigastric vessels
    • external (superficial) ring is a triangular opening in the external oblique aponeurosis that lies just lateral to the pubic tubercle
  • Inguinal canal
    • boundaries
      • anterior wall
        • formed by the aponeuroses of external oblique and internal oblique muscles
      • posterior wall
        • formed by the aponeurosis of transversus abdominis muscle and transversalis fascia
      • superior wall
        • roof
        • formed by the arching fibers of the internal oblique and transversus abdominis muscles
      • inferior wall
        • floor
        • formed by the inguinal ligament and lacunar ligament
    • contents
      • male
        • inguinal canal transmits spermatic cord 
          • spermatic cord contents = "FANO x 3"
            • Fascia
              1. internal spermatic fascia
              2. cremasteric fascia
                • contains cremaster muscle
              3. external spermatic fascia
            • Arteries
              1. testicular artery
              2. artery to vas deferens
              3. artery to cremaster
            • Nerves
              1. ilioinguinal nerve
              2. genital branch of genitofemoral nerve
                • innervates cremaster muscle
              3. autonomics
            • Other
              1. vas deferens
              2. pampiniform plexus of veins
              3. testicular lymphatics
      • female
        • inguinal canal transmits
          1. round ligament of uterus
          2. ilioinguinal nerve 
            1. does not pass through deep inguinal ring - only travels through part of the inguinal canal


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