Comparison Of The Analgesia Obtained By Infiltration For The Joinings Of Episiotomies (Liropep)

Pre-inclusion criteria : * Assent of participation in the study signed * Major parturient (\> 18 years) in the course of work in room of childbirth * Mono-foetal pregnancy * Presentation at the top Inclusion Criteria: * Checking of the criteria of pre-inclusion * Oral confirmation of the assent of the patient * ASA 1 or 2 * Childbirth by low way * Patient having an epidural analgesia * Patient having an episiotomy * Counter-indication with the ropivacaïne Pre-exclusion criteria : * Absence of signed assent of participation in the study * Counter indication with the lidocaïne * General counter-indications suitable for the epidural anaesthesia , independently of the local anaesthetic used * Counter-indications with the infiltration: patient under anticoagulants, coagulopathy * Allergy to the lidocaine or the ropivacaine * Allergy to the one of analgesics per bones used in the assumption of responsibility of routine * Severe insufficiency hepatic and/or renal and/or ulcerates gastro-duodénal (in the case of anti-inflammatory drug regulation not steroid during the postpartum) * Minor * Major protected within the meaning of the law Huriet * Patient during one time of exclusion following another biomedical study Exclusion Criteria: * Absence of oral confirmation of the assent of the patient * Infection or ignition of the point of puncture * Analgesia epidural not functional * Dural breach * Appearance of ascribable side effects to only the anaesthetic buildings at the time of epidural analgesia * Median Episiotomy (increased risk of lesions of the sphincter) * Need for an instrumentation at the time of expulsion * Haemorrhage of the delivery requiring a blood transfusion and/or general anaesthesia in urgency with surgical operation for haemostasis