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Reconstructive Techniques and Outcomes for Large (≥4 cm) Peripheral Nerve Defects: A Meta-analysis.

Julius Thyen1,2, Christine Radtke2

  • 1From the Faculty of Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.

Plastic and Reconstructive Surgery. Global Open
|April 24, 2026
PubMed
Summary
This summary is machine-generated.

Surgical repair of long peripheral nerve defects (≥4 cm) lacks a superior technique. Standardized outcome measures are crucial for advancing nerve reconstruction and improving patient quality of life.

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Area of Science:

  • Neurosurgery
  • Regenerative Medicine
  • Clinical Outcomes Research

Background:

  • Peripheral nerve injuries significantly impair motor and sensory function, impacting quality of life.
  • Surgical repair of short nerve defects is established, but large defects (≥4 cm) present significant challenges.
  • Current consensus on measuring clinical outcomes after nerve reconstruction is lacking.

Purpose of the Study:

  • To summarize surgical techniques and outcomes for peripheral nerve defects measuring 4 cm or more.
  • To identify the most common reconstruction methods and their reported efficacy.
  • To highlight the need for standardized outcome measures in nerve repair research.

Main Methods:

  • Systematic literature search of studies published between 1990 and 2024.
  • Inclusion criteria: human studies on surgical nerve reconstruction with defect lengths ≥4 cm and follow-up >3 months.
  • Data extraction included sample size, nerve affected, treatment type, follow-up duration, and outcomes.

Main Results:

  • Twenty-four studies met eligibility criteria, identifying six reconstruction techniques.
  • Flap-associated autologous nerve grafting was the most common technique.
  • No single reconstruction technique demonstrated clear superiority for motor or sensory recovery.

Conclusions:

  • Multiple surgical approaches exist for long peripheral nerve defects, but none show definitive superiority.
  • The lack of standardized outcome measures for motor and sensory function hinders comparative analysis and treatment development.
  • Establishing standardized assessment protocols is essential for advancing peripheral nerve repair research and clinical practice.