Analgesic Efficacy of Transcutaneous Electrical Nerve Stimulation (TENS) Versus Placebo During the First Stage of Labor
Transcutaneous Electric Nerve Stimulation, Labor Pain
About this trial
This is an interventional treatment trial for Transcutaneous Electric Nerve Stimulation
Eligibility Criteria
Inclusion Criteria:
- Women attending routinary fetal monitoring before labor
Exclusion Criteria:
- Multiparous
- Scheduled cesarean
- Implantable Cardioverter Defibrillator (ICD) or pacemaker
- Epilepsy
- Fetal malformation
- Language barrier
Sites / Locations
- Hospital General Universitario de CastellónRecruiting
Arms of the Study
Arm 1
Arm 2
Experimental
Placebo Comparator
Intervention
Placebo
TENS application using the TensMed S82 (Enraf Nonius). Current parameters: balanced symmetric biphasic square waveform, continuous stimulation, frequency 80 Hz, pulse duration modulated between 250 and 290 μs, modulation time 5 seconds. Self-adhesive electrodes of 50 x 90 mm applied paravertebrally to 2 cm. of the spinous apophysis. Use of two channels with independent intensity (mA): electrodes of the first channel applied at level T10-L1 and second channel ones at level S2-S4. Maximum intensity without reaching pain, increasing the intensity throughout the application to maintain this level. Start of the intervention when the woman expresses pain. End of the intervention when neuraxial anesthesia is applied (if the woman demands it) or after delivery.
Same application as Intervention, but using 0,1 mA as fixed intensity on both channels.