Transcutaneous electrical nerve stimulation does not augment combined spinal epidural labour analgesia

Area of Science:

• Obstetrics and Gynecology
• Anesthesiology
• Pain Management

Background:

• Combined spinal epidural (CSE) analgesia provides effective labor pain relief but has limitations.
• Transcutaneous Electrical Nerve Stimulation (TENS) is known to modulate pain perception.
• The frequency-dependent nature of nerve blockade suggests TENS might enhance CSE effectiveness.

Purpose of the Study:

• To investigate if Transcutaneous Electrical Nerve Stimulation (TENS) can improve the quality and duration of labor analgesia provided by the spinal component of a combined spinal epidural (CSE) technique.
• To assess the impact of active TENS on pain, sensory level, motor blockade, and duration of analgesia during labor.

Main Methods:

• A randomized, double-blind study involving 40 parturients undergoing CSE for labor analgesia.
• Participants were assigned to receive either active or inactive TENS alongside a standardized CSE.
• Pain, sensory and motor blockade levels, and duration of analgesia were systematically recorded.

Main Results:

• No significant difference was observed in the duration of the spinal analgesia between the TENS on and TENS off groups (91.1 vs. 83.1 minutes).
• Kaplan-Meier and Mantel-Cox analyses indicated no statistically significant difference in treatment outcomes.
• Pain relief was comparable in the first hour regardless of TENS application.

Conclusions:

• Transcutaneous Electrical Nerve Stimulation (TENS) did not enhance the quality or duration of labor analgesia when combined with the spinal portion of CSE.
• The findings suggest TENS is not an effective adjunct for improving CSE labor analgesia in healthy parturients.