Evaluation of the Benefit of Non-opioid General Anaesthesia on Postoperative Pain in Laparoscopic Colonic Surgery

Inclusion Criteria: * Patient over 18 years of age who has read and signed the consent form for participation in the study * Patient candidate for laparoscopic colectomy (planned or emergency) with possible conversion to laparotomy Exclusion Criteria: * Severe renal failure with baseline clearance\<30, hepatic failure with baseline PT\<40%, cardiac failure with LVEF\<20%. * Patient under court protection, guardianship or curatorship * Pregnant or breastfeeding patient * Patient not affiliated to the French social security system * Impossible to give the subject informed information and/or to give written informed consent: dementia, psychosis, disturbed consciousness, non-French speaking patient * Contraindication to anaesthesia or to the administration of one of the products used in the anaesthesia protocol * Patient participating in another interventional research or in a period of exclusion from a previous research