Electrical stimulation enhances sensory recovery: a randomized controlled trial

Area of Science:

• Neuroscience
• Regenerative Medicine
• Clinical Trials

Background:

• Electrical stimulation (ES) shows promise for peripheral nerve regeneration in animal studies.
• Its efficacy in human sensory nerve injury remains largely untested.
• Digital nerve transection presents a significant clinical challenge for sensory recovery.

Purpose of the Study:

• To investigate the efficacy of postsurgical electrical stimulation (ES) in enhancing sensory nerve regeneration after digital nerve transection in humans.
• To compare outcomes between patients receiving ES and those undergoing surgery alone.

Main Methods:

• 36 patients with complete digital nerve transection underwent epineurial repair and were randomized to receive either 20Hz continuous ES or sham stimulation postoperatively.
• A blinded evaluator monitored sensory recovery (spatial discrimination, pressure threshold, small fiber testing) and functional outcomes (Disability of Arm, Shoulder, and Hand questionnaire) for 6 months.

Main Results:

• The ES group demonstrated significantly greater improvements in all measured sensory modalities by 5-6 months postoperatively compared to the control group.
• While a trend towards improved functional outcomes was observed in the ES group, it did not reach statistical significance (p > 0.01).

Conclusions:

• Postsurgical electrical stimulation (ES) effectively enhances sensory reinnervation in patients following complete digital nerve transection.
• The benefits of ES extend to a broad spectrum of sensory functions, offering a potential therapeutic advancement.