GOAL-Directed ANalgesia (GOALDAN)

The primary purpose of GOALDAN study is to demonstrate the superiority of a targeted perioperative analgesic strategy by the ANI over the usual practice on the incidence of immediate postoperative pain. The investigators hypothesized that a prophylactic administration of morphine in patients with risk of postoperative pain determined by the ANI at the end of the intervention would reduce the incidence of immediate postoperative pain and that the targeted analgesia to ANI and minimal alveolar concentration (MAC) of desflurane could improve the perioperative hemodynamic, and the postoperative becoming.