Translational Approaches to Electrical Stimulation for Peripheral Nerve Regeneration.
Seth C Ransom, Shane Shahrestani, Brian V Lien and 6 others
PMID 33043791WHAT IT FOUND
Brief electrical stimulation after nerve surgery shows promise for faster recovery in small human trials, but results are mixed.
A key trial found no significant difference in functional disability compared to surgery alone, though sensory recovery was better.
Key findings
01In a randomized trial of patients with digital nerve transection, brief electrical stimulation did not significantly improve functional disability scores compared to surgery alone.
02The same trial reported that stimulated patients had significant recovery of sensory function, unlike the control group.
03In patients with severe carpal tunnel syndrome, stimulation led to earlier muscle reinnervation but did not improve functional outcomes.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
The review relies on a small number of human clinical trials with limited sample sizes, such as the 36-patient digital nerve transection study. Many of the positive findings come from animal studies, which may not translate to humans due to differences in nerve length and diameter. Some trials used outcome measures that may not have been sensitive enough to detect changes in motor function, such as the tests for thenar muscle function in carpal tunnel syndrome. The review acknowledges that spontaneous recovery can occur after nerve injuries, making it difficult to attribute improvements solely to electrical stimulation without robust control groups.
Declared interests
The authors declared no financial interests or conflicts of interest.
The easy way to misread this
Do not assume that brief electrical stimulation improves overall function or disability. In the primary human trial cited, functional disability scores did not significantly differ between the stimulated and control groups, even though sensory recovery was better in the stimulated group.