Inclusion Criteria:  ASA (American Society of Anesthesiologists) Class I-IV adult, with programmed midline laparotomy Have given an informed consent Able to read and understand french Affiliation to a social security scheme  Exclusion Criteria:  Local anesthesic contraindication Epidural analgesia contraindication With impossibility to set up bilateral rectus sheath block Participation in another clinical study Pregnant women