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Anatomical variations in the preperitoneal space are common during totally extraperitoneal (TEP) procedures. Identifying key landmarks, like the vas deferens crossing, aids dissection and improves surgical outcomes.

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Area of Science:

  • Surgical Anatomy
  • Minimally Invasive Surgery
  • Hernia Repair

Background:

  • Totally extraperitoneal (TEP) procedures are standard for hernia repair.
  • Understanding preperitoneal anatomy is crucial for successful TEP procedures.

Purpose of the Study:

  • To identify and measure key anatomical landmarks in the preperitoneal space during TEP procedures.
  • To document variations in these landmarks and their implications for surgical dissection.

Main Methods:

  • Prospective study of 46 TEP procedures in 30 patients.
  • Measurement of distances between specific anatomical landmarks (pubic symphysis, arcuate line, inferior epigastric artery, vas deferens, obliterated umbilical artery).
  • Documentation of posterior rectus sheath morphology.

Main Results:

  • Significant individual variations were observed in the distances between anatomical landmarks.
  • Complete rectus sheath was present in 30.4% of cases.
  • The crossing site of the vas deferens and obliterated umbilical artery was identified as a reliable landmark.

Conclusions:

  • Anatomical variations in the preperitoneal space are frequent in TEP procedures.
  • The vas deferens and obliterated umbilical artery crossing site is a valuable landmark for dissection.
  • The presence of a complete rectus sheath necessitates careful incision to access the preperitoneal space.