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