Evaluation of the effectiveness of transcutaneous nerve stimulation during labor in breech presentation: a case series.

Objective: To analyze the effectiveness of pain relief with transcutaneous electrical nerve stimulation (TENS) dispositive during labor in breech vaginal delivery and also to describe its tolerance and satisfaction.Design: A randomized, double-blind, and placebo-controlled trial was conducted.Setting: Labor room of Complejo Hospitalario Universitario Insular-Materno Infantil (Spain).Participants: Ten women who met the inclusion criteria of the clinical trial and also had a fetus breech presentation were randomly assigned to three groups.Interventions: A portable TENS, Cefar Rehab 2pro®, unit was used to apply the experimental intervention, with different doses in the three groups in women during labor. The device intensity (amplitude) was individually adjusted to each participant's maximum sensory level. The pain was evaluated with visual analog scale (VAS). COMFORTS scale was used to measure women's satisfaction.Results: A significant association of VAS was detected depending on the type of TENS over time. Active TENS2 was the only group that obtained an improvement with clinically significant results. In connection with women satisfaction, active TENS2 group was also the group that presented higher values.Conclusions: We can recommend the use of TENS dispositive to relieve pain during labor, also in those women with breech presentation.

Evaluation of different doses of transcutaneous nerve stimulation for pain relief during labour: a randomized controlled trial.

BACKGROUND: Pain during labour is one of the most intense pain that women may experience in their lifetime. There are several non-pharmacological analgesic methods to relieve pain during labour, among them transcutaneous electrical nerve stimulation (TENS). TENS is a low-frequency electrotherapy technique, analgesic type, generally used in musculoskeletal pathology, but it has also come to be used as an alternative treatment during labour. The purpose of this study is to investigate the pain-relieving effect of a TENS application during labour and to find out the most effective dose. METHODS: This study is a randomized, double-blind, placebo-controlled trial. TENS therapy was initiated at the beginning of the active phase of labour. Participants were randomly assigned to three groups (21 per group: two active TENS and one placebo). Active TENS 1 intervention consisted in a constant frequency of 100-Hz, 100-µs, active TENS 2 intervention consisted in a varying high-frequency (80-100 Hz), 350 µs, and in a placebo group, participants were connected to the TENS unit without electrical stimulation. TENS was applied with two self-adhesive electrodes placed parallel to the spinal cord (T10-L1 and S2-S4 levels). The primary outcome was pain intensity (0-10 cm) measured on a visual analogue scale (VAS) at several stages (at baseline and at 10 and 30 min later). Secondary outcomes included women's satisfaction (via the Care in Obstetrics: Measure for Testing Satisfaction scale). RESULTS: Sixty-three women participated. Regarding baseline characteristics, no differences were found among the three groups. The active TENS 2 group obtained an improvement with clinically significant VAS results (- 2.9, 95% confidence interval - 4.1 to - 1.6, p <  0.001). Regarding satisfaction, the results also revealed better results in the active TENS than in the placebo group. CONCLUSIONS: TENS with high frequencies modified in time as well as high pulse width are effective for relieving labour pain, and they are well considered by pregnant participants. TRIAL REGISTRATION: ClinicalTrials.gov, NCT03137251 . Registered on 2 May 2017.