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Sensory restoration of the critical border of the small finger by an emergency heterodigital nerve transfer after circular saw injury

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Case reports sensory recovery after nerve transfer for digital nerve injuries, suggesting viability in hand surgery.

Sensory recovery at 14 months post-surgery reached grading scale S4 for the 4th finger and S3+ for the ulnar border of the 5th finger.
The procedure involved a 2.5 cm nerve defect after circular saw injury, which led to emergency nerve transfer to restore sensation.
Donor site morbidity included anesthesia of the ulnar sided tip of the middle finger, highlighting potential limitations of the technique.
Nerve transfer of the proper ulnar digital nerve is a feasible approach for restoring sensory function in the small finger after trauma.

Ioncioaia et al. (2025) studied this question.

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