Impact of Peritoneal Gas Drain on Postoperative Pain for Gynaecological Cancer Patients With Minimally Invasive Surgery

Inclusion Criteria: * Age ≥ 18 ans ; * Woman who underwent laparoscopic or robotised laparoscopic surgery in peritoneal cavity (benign or malignant gynaecological affection) ; * Planned ambulatory surgery * Patient willing and able to be treated and followed according the protocol during the trial ; * Patient covered by the French "Social Security" regime ; * Effective contraception for reproductive age patients ; * Signed written informed consent before surgery Per-operatory eligibility criterion : * No conversion from laparoscopic surgery to laparotomy surgery Exclusion Criteria: * Extra-peritoneal surgery scheduled ( example : aortic dissection) ; * Upper-abdomen surgery (example : liver, gall bladder) ; * History of shoulders pains prior to surgery (the assessment must be carried out within a period of 30 days before the surgery) ; * Inability to comply with medical follow-up of the trial (geographical, social or psychic reasons) * Person under guardianship * Pregnant or breastfeeding woman Non eligibility criterion known during the operation : * Conversion from laparoscopic surgery to laparotomy surgery