TENS Machines: An Overview

What Are TENS Machines?

TENS machines, or transcutaneous electrical nerve stimulation devices, are compact tools that connect to electrodes placed on the skin. These devices deliver low-voltage electrical currents through the electrodes to stimulate nerve activity. They are primarily utilized for pain relief, with some studies indicating their effectiveness in alleviating labor pain.

How TENS Works

The mechanism behind TENS is believed to involve the blockage of pain signals transmitted by the nerves. Additionally, it may promote the release of endorphins, natural substances in the body that help reduce pain. Many individuals prefer TENS therapy due to its non-medication approach and minimal side effects.

TENS for Labor Pain

Clinical Trials and Research

A clinical trial aimed to assess the efficacy of TENS as a pain relief method for women in labor. This approach is particularly attractive for those seeking alternatives to medication. The trial was designed as a randomized, double-blind, placebo-controlled study, considered the ‘gold standard’ in clinical research.

During the active phase of labor, participants began receiving TENS treatment. Researchers experimented with various machine settings to identify the most effective configurations for managing labor pain. Pain relief was evaluated during the first 30 minutes of the treatment.

The study reported notable reductions in pain among the women who received TENS therapy. Importantly, no adverse events were recorded for either mothers or babies during the trial.

Electrode Placement Variability

Research has indicated different potential locations on the back for electrode placement, with no definitive consensus on the optimal method. Variations in TENS machines and their settings were also noted across different studies.

Potential Side Effects of TENS

Understanding the Risks

Despite its appeal due to ease of use and safety, TENS therapy may carry some potential side effects. Researchers have identified possible indirect side effects, which may include:

– Prolonged labor (stages 1 and 2)
– Improper positioning of the baby
– Increased administration of oxytocin
– Higher likelihood of instrumental vaginal delivery

If you are considering TENS for labor pain management, it is advisable to consult with your healthcare provider to weigh the potential risks and benefits and determine if this option is suitable for you.

References

Teoli D, An J. Transcutaneous Electrical Nerve Stimulation. [Updated 2021 May 10]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2021 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK537188/

Báez-Suárez A, Martín-Castillo E, García-Andújar J, García-Hernández JÁ, Quintana-Montesdeoca MP, Loro-Ferrer JF. Evaluation of different doses of transcutaneous nerve stimulation for pain relief during labour: a randomized controlled trial. Trials. 2018;19(1):652. Published 2018 Nov 26. doi:10.1186/s13063-018-3036-2 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6258317/