Analgesic Effect of Bilateral Quadratus Lumborum Block in the End of Colorectal Laparosopic Surgery.

"* Bilateral Quatratus lumborum block is performed with ultra sound guidance. The high frequency probe is placed right to the umbilicus, and slips laterally to the side to block. It allows showing the three belts of larges muscles of abdomen (External Oblicum, internal oblicum, and transversal of the abdomen). Laterally, these three are merging to from fascia transversalis. Under fascia transversalis, we can see quadratus lumborum muscle. Punction point in lateral, 1cm in the plan separating quadratus lumborum block and fascia transversalis~* 20 ml of ropivacaïne 3.75mg/ml are injected after aspiration test. If in doubt, hydro localisation car be realised."