Avoid With Locoregional Analgesia Persistant Postoperative Pain In Children

Persistent postoperative pain is a substantial pain (scores 4-10 using a 0-10 numeric scale) that develops 3 months after surgery. Persistent postoperative pain can be a problem even in ambulatory surgery. Loco-regional analgesia could prevent the occurrence of this pathology but contradictory results are found in ancient studies. This study is the first randomized controlled study in children about loco-regional analgesia and persistent postoperative pain in traumatologic orthopedic surgery. One interventional arm will receive a locoregional analgesia after general anesthesia and before incision. The other arm will only receive systemic analgesia during general anesthesia. The incidence of persistent postoperative pain at 3, 6 and 12 months will be compared in these two groups. The goal is to show the decrease of the incidence of the persistent postoperative pain in the group "locoregional analgesia".