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Rapid intraoperative facial nerve expansion
D V Martini1, G Har-El, J McPhee
1SUNY-Health Science Center at Brooklyn/Long Island College Hospital, NY, USA.
Summary
Rapid intraoperative nerve expansion shows promise for repairing nerve defects. This technique, tested in cats, yielded functional results comparable to nerve grafting, suggesting a viable alternative.
Area of Science:
- Neurosurgery
- Regenerative Medicine
- Nerve Repair
Background:
- Nerve length defects pose significant reconstructive challenges following trauma or cancer surgery.
- Current methods like nerve grafting have limitations, including donor site morbidity.
Purpose of the Study:
- To evaluate rapid intraoperative nerve expansion as a novel method for repairing nerve length defects.
- To compare the functional and morphological outcomes of nerve expansion with traditional nerve grafting.
Main Methods:
- A cat facial nerve model was used to compare rapid intraoperative nerve expansion with nerve grafting and intact nerves.
- Evaluation criteria included gross function (symmetry, blink reflex), electromyography, nerve conduction velocity, morphology, and axon count at 1 year post-repair.
Main Results:
- Three out of five expanded nerves regenerated, with functional results comparable to regenerated grafted nerves.
- Mean electromyography thresholds and nerve conduction velocities were similar across regenerated expanded, grafted, and intact nerves.
- Morphological examination post-expansion showed intact fascicular structure; however, only 3/5 regenerated after 1 year.
Conclusions:
- Rapid intraoperative nerve expansion is a possible method for repairing nerve length deficits, offering potential advantages like a single suture line and no donor site morbidity.
- This pilot study indicates that nerve expansion and regeneration can achieve functional outcomes similar to nerve grafting.
- Further research is warranted to develop rapid and reliable intraoperative nerve expansion techniques.