IRCT2015062222874N1 IRCT 2016-01-22 Ahvaz University of Medical Sciences The effect of entonox on episiotomy pain in primiparous women Effects of entonox in comparison with lidocaine on severity of pain after episiotomy in nulliparous women 2015-06-25 anticipated 120 Complete https://irct.ir/trial/19634 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment. 3 The relation ship between entonox with episiotomy pain in nulliparous women. Intervention 1: Intervention group received entonox two minutes before starting episiotomy incision and then entonox cut after incision, again two minutes before starting episiotomy repair until the end of the procedure to reduce the pain. The procedure of incision and repairing episiotomy was performed by one midwife. The severity of pain was measured using visual analogue scale (VAS) after repair episiotomy number each sample were recorded in a data management by another staff. Entonox was maintained at above 10 ˚C in 24 hour before utilizing. Women in intervention group inhaled entonox deeply and slowly as they were trained. Entonox mask was putted on face by mother to inhale repeatedly according to respiration model “deep inhale pausing slow exhale rest”. Women are free to using entonox whenever they would like. Intervention 2: Control group as routine received 5 milliliter lidocaine 2% before starting episiotomy incision and again before starting episiotomy repair. The procedure of incision and repairing episiotomy was performed by one midwife. The severity of pain was measured using visual analogue scale (VAS) after repair episiotomy number each sample were recorded in a data management by another staff.