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Microvascular Decompression: Salient Surgical Principles and Technical Nuances
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Microsurgical Techniques for Digital Nerve Injuries and Vascular Injuries.

Eric K Montgomery1, Dawn M G Rask1, David J Wilson1

  • 1Orthopaedic Surgery Department, Brooke Army Medical Center, Joint Base San Antonio, San Antonio, Texas.

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Summary

Surgical repair of digital nerves and arteries aims to restore sensation and preserve digits. While techniques like nerve glues and grafts improve outcomes, complete sensation recovery remains challenging, with risks of neuroma or infection.

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Area of Science:

  • Orthopedics
  • Neurosurgery
  • Hand Surgery

Background:

  • Digital nerve and vascular injuries often result from traumatic wounds, necessitating surgical exploration and repair.
  • Surgical options include tension-free end-to-end repair or reconstruction using sutures, nerve "glues" (fibrin-based gels), or nerve wraps/conduits.
  • For nerve gaps, nerve allografts and autografts are superior to conduit reconstruction.

Purpose of the Study:

  • To outline surgical techniques for digital nerve and vascular repair.
  • To emphasize the goals of improved sensation and reduced neuroma formation.
  • To discuss alternatives and expected outcomes of digital nerve reconstruction.

Main Methods:

  • Surgical exploration and identification of neurovascular bundles.
  • Sharp incision of traumatized nerve/artery ends to facilitate repair.
  • Mobilization of structures, measurement of defects, and primary repair or reconstruction using magnification and fine sutures (8-0 or 9-0).
  • Application of nerve conduits or wraps with fibrin glue if needed.

Main Results:

  • Primary repair and reconstruction increase the likelihood of sensation recovery and digit preservation.
  • Nerve "glues" reduce initial gapping and increase tensile strength when used with wraps.
  • Nerve allografts and autografts yield similar results for nerve gaps.

Conclusions:

  • Surgical repair of digital nerves enhances the probability of sensation recovery, though complete recovery is not guaranteed.
  • Arterial repair is crucial for digit preservation in cases of vascular injury.
  • Key considerations include careful technique, appropriate material selection, and understanding the potential outcomes and risks.