"What Really Matters When Performing a Laparoscopic Roux-en Y Gastric Bypass?" Literature-Based Key Steps Towards Success and Standardization of the Procedure.

Lack of standardization in the Roux-en-Y gastric bypass (RY-GBP) is quite well established. We all learned the basics of the technique, but a lot of differences do exist in performing each step of the procedure. Based on scientific evidences, coming from an extensive and meticulous review of the literature of the last 20 years, we thus address the different technical steps of the procedure and their importance to try and propose a standardization of RYGBP. A lot of possibilities exist at each and every step of a RYGBP. They influence the postoperative complications, the end weight loss (EWL), weight regain, and resolution of obesity bounded comorbidities. Furthermore, lack of standardization leads to problems regarding comparison of scientific data in the related literature.