[Endoscopic totally visceral sac separation for ventral hernias repair: anatomy notes and technical considerations]

The abdominal wall can be treated as a whole physiological and functional entity which is composed of multiple anatomical structures and planes. Surgical approaches and technical details that required are diverse in different area. Indeed, the abdominal wall is confined by several anatomical boundaries which make these surgical planes separated. If one could dissect these boundaries, then separated spaces could be connected, establishing an ample retromuscular/preperitoneal space to accommodate the mesh of ventral hernia repair. The concept of totally visceral sac separation (TVS) is achieved. The TVS concept is a summary of diverse ventral hernia repair techniques. Since its initiation and spread, this technique has been widely accepted and implemented by domestic surgeons due to its outstanding performance. This treatise will review the relevant anatomy as well assurgical tricks by the authors that aid in performing TVS. Some of the details are more tricky and harder to understand, thus this in-depth description of the technique.