Transcutaneous Electrical Nerve Stimulation for Pain Relief During the Active Phase of Labor

• Evaluate the effectiveness of Transcutaneous Electrical Nerve Stimulation (TENS) for pain relief in the early active phase of labor [ Time Frame: 30 minutes ] [ Designated as safety issue: No ]
  To evaluate the effectiveness of therapy effectiveness of Transcutaneous Electrical Nerve Stimulation such as a resort for pain relief for the phase activity groups
  
  

• Assess whether the TENS during the active phase of labor postpones the use of analgesia. [ Time Frame: 10 hours ] [ Designated as safety issue: No ]
  Consider whether the TENS therapy during the active phase of labor defers request for analgesia use for pain relief for pregnant women
  
  
• Observe and compare the evolution of labor and obstetric outcomes in intervention and control groups [ Time Frame: 10 hours ] [ Designated as safety issue: No ]
  Observe and compare the historical performance of the work and obstetric intervention and control groups
  
  
• To assess the degree of satisfaction of mothers of control and intervention groups for the presence of a professional side during the study period. [ Time Frame: 10 hours ] [ Designated as safety issue: No ]
  To assess the degree of satisfaction of mothers of intervention and control groups, the presence of a professional side during the study period.
  
  

Pain in the work appears as a subjective experience of interaction, involving a wide individual influences physiological, psychosocial and environmental factors, representing a major clinical signs of this phase. Despite presenting an important biological function, is now well established the need for their relief, since its persistence is associated with detrimental effects for both mother and fetus. Among non-pharmacological resources available, the investigators highlight the massage therapy that has shown positive effects in relieving pain and promote comfort of the mother. The objective of this research is to evaluate the efficacy of Transcutaneous Electrical Nerve Stimulation (TENS) for pain relief in the early active phase of labor. The research will be of type randomized controlled trial, consisting of low-risk nulliparous pregnant women admitted to the Reference Center for Women's Health in Ribeirão Preto. Mothers will be divided into two groups (lumbosacral massage) and control (routine maternity) and will be evaluated before and after therapy, which corresponds to 30 minutes between 4-5 cm of cervical dilation. The evaluation will be performed by numerical category scale, location and Pain Diagram McGll Pain Questionnaire (short form). After the delivery will be a questionnaire of customer satisfaction. After collecting the data, the groups are statistically analyzed using the linear regression model with mixed effects (fixed and random), taking into account a value of p <0.05 for statistical significance of 5%.