Laying and management of the drain (strictly randomized arm with drainage)
ProcedureAt the end of intervention, the surgeon will position an aspiration drain in order to permit a postoperative pelvic drainage. The drain will be positioned forward sacrum, behind anastomosis. The drain will be leaved in place between 3 and 5 days. The criteria of drain ablation are the absence of haemorrhagic liquid and/or un daily debit < 100ml. Nursing care will be daily with change of bottle for collect pelvic serosity, accounting of quantity of collected liquid and realization of a dried bandage through contact with penetration of the drain.