Comparison of Extended Totally Extra-peritoneal Repair (ETEP) and Subcutaneous On-lay Endoscopic Approach (SCOLA) for Para-umbilical Hernia (PUH).

The eTEP (Extended Totally Extra-Peritoneal) approach is a minimally invasive "keyhole" surgery for repairing hernias like paraumbilical hernias. Its core principle is to access the area behind the abdominal muscles without entering the main abdominal cavity. The surgeon creates a workspace between the muscle and its inner lining. A key step is crossing behind the midline to access both sides of the abdomen. The hernia is pushed back into place, and the inner lining is closed. A standard, low-cost mesh is then placed in this space behind the muscles to reinforce the abdominal wall, where it is held in place by natural pressure. Key advantages include using inexpensive mesh without risky bowel contact, potentially leading to less pain. The main challenges are a steep learning curve and longer initial operating times due to the technically complex dissection in a confined space.

The Subcutaneous Onlay Endoscopic Approach (SCOLA) is a minimally invasive technique for repairing hernias near the belly button. In this approach, the surgeon works in the fatty layer between the skin and the abdominal muscles. After pushing the hernia back into place, the hole in the abdominal wall is stitched closed. A large mesh is then placed in this fatty layer, just in front of the muscles, to act as a strong reinforcement patch. The main benefit is that the mesh never touches the internal organs, eliminating the risk of bowel complications. However, creating this space under the skin carries a significant risk of fluid buildup (seroma), which often requires a temporary drain after surgery.