Tension-Free Inguinal Hernia Repairs

A tension-free repair is one in which the herniated defect is bridged or reinforced using a prosthetic mesh, so that native tissues are not sutured together under tension. This is the principle that revolutionized hernia surgery and dramatically reduced recurrence rates compared to older tissue-approximation techniques.

Analyzing Each Technique

• 1. Stoppa's repair: A giant prosthetic reinforcement of the visceral sac placed in the preperitoneal space via a large mesh. It is a classic mesh-based, tension-free repair, typically used for bilateral or complex/recurrent hernias.
• 2. Lichtenstein's repair: The gold-standard open repair, in which a flat polypropylene mesh is sutured over the posterior wall of the inguinal canal without approximating the conjoint tendon to the inguinal ligament under tension. This is the prototype tension-free mesh repair.
• 3. Laparoscopic TEP (Totally Extra-Peritoneal) repair: A minimally invasive approach that places a large mesh in the preperitoneal space without entering the peritoneal cavity. Like TAPP, it is a mesh-based, tension-free technique.
• 4. Desarda's repair: This is a non-mesh, tissue-based repair that uses a strip of the patient's own external oblique aponeurosis as a new "reinforcement layer" for the posterior wall. Because it relies on autologous tissue rather than prosthetic mesh, it is classified alongside repairs like Shouldice/Bassini/McVay as a tissue (tension) repair, not among the standard tension-free mesh repairs, even though its proponents claim reduced tension compared to classic suture repairs.

Why the Other Options Are Incorrect

• "1, 2 and 4" and "2, 3 and 4" and "1, 3 and 4" are all incorrect because each wrongly includes Desarda's repair, which is a mesh-free, tissue-based reconstruction and is conventionally excluded from the "tension-free" (mesh) group in standard surgical classifications.

Conclusion

The three procedures that are genuinely mesh-based tension-free inguinal hernia repairs are Stoppa's repair, Lichtenstein's repair, and Laparoscopic TEP repair, corresponding to statements 1, 2 and 3. Desarda's repair (statement 4), being a non-mesh autologous tissue repair, is correctly excluded, making "1, 2 and 3" the correct answer.