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Efficacy of Nerve Tape-Assisted PEG Fusion in a Rabbit Tibial Nerve Repair Model
Jonathan Isaacs1, Geetanjali Bendale1, Charles Reiter1
1Division of Hand Surgery, Department of Orthopaedic Surgery, Virginia Commonwealth University Health System, Richmond, Virginia, United States.
Journal of Reconstructive Microsurgery
|November 5, 2025
Summary
Polyethylene glycol (PEG) hydrogel shows potential for nerve repair, but PEG fusion did not improve nerve regeneration or functional recovery in a rabbit tibial nerve model. The Nerve Tape (NT) device also did not enhance PEG fusion efficacy over traditional sutures.
Area of Science:
- Biomaterials Science
- Neuroscience
- Regenerative Medicine
Background:
- Polyethylene glycol (PEG) hydrogels can fuse transected axons, but require precise nerve alignment.
- Conventional microsuture neurorrhaphy presents challenges in achieving stable and accurate nerve end alignment for effective fusion.
- Nerve Tape (NT) is a microhook device designed to improve nerve coaptation stability and accuracy.
Purpose of the Study:
- To modify and validate Nerve Tape (NT)-assisted Polyethylene glycol (PEG) hydrogel fusion.
- To assess the efficacy of NT-assisted PEG fusion in a rabbit proximal tibial nerve repair model at an intermediate time point.
- To compare NT-assisted PEG fusion with suture-assisted PEG fusion and suture-only repair.
Main Methods:
- Rabbit proximal tibial nerve transection and immediate repair using NT+PEG, Suture+PEG, or Suture only (n=6 per group).
- Acute confirmation of PEG-induced axonal fusion via compound motor action potential (CMAP) restoration.
- 16-week outcome assessment including electrodiagnostic testing, nerve histomorphology, and muscle morphology.
Main Results:
- All animals showed immediate CMAP restoration.
- No statistical differences were observed at 16 weeks in nerve conduction velocity, amplitude, axon counts, g-ratios, or muscle morphology between groups.
- Modified NT did not improve the reliability or efficacy of PEG fusion compared to microsuture neurorrhaphy.
Conclusions:
- Polyethylene glycol (PEG) hydrogel fusion did not enhance nerve regeneration or functional recovery in this rabbit tibial nerve repair model.
- The modified Nerve Tape (NT) device did not offer significant advantages over conventional microsuture neurorrhaphy for PEG-assisted nerve repair.
- Further research may be needed to optimize PEG hydrogel formulations and nerve coaptation techniques for improved clinical outcomes.
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