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Optimizing Lower Extremity Local Flap Reconstruction in Peripheral Vascular Disease.

Karen R Li, Rachel N Rohrich1, Christian X Lava

  • 1Department of Plastic and Reconstructive Surgery, MedStar Georgetown University Hospital; Washington, DC.

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|September 27, 2024
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Summary

Local flaps for limb salvage in arterial disease can be successful with alternative blood flow routes. However, indirect flow patterns increase contralateral amputation risk, necessitating careful pedicle selection for foot and ankle reconstruction.

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Area of Science:

  • Vascular Surgery
  • Reconstructive Surgery
  • Limb Salvage Procedures

Background:

  • Local flaps are crucial for limb salvage in patients with advanced arterial disease.
  • Understanding blood flow patterns to flap pedicles is essential for successful reconstruction.

Purpose of the Study:

  • To compare outcomes of different blood flow patterns to local flap pedicles in foot and ankle reconstruction.
  • To evaluate the impact of direct inline flow (DF) versus indirect flow (IF) on flap success and limb salvage.

Main Methods:

  • Retrospective review of 103 local flaps in 92 patients with advanced arterial disease.
  • Classification of flap pedicle blood flow as direct inline flow (DF) or indirect flow (IF) via angiogram.
  • IF patterns categorized as arterial-arterial connections (AC) or random collaterals (RC).
  • Primary outcomes: immediate flap success and limb salvage. Comparative analyses using chi-squared and Fisher tests.

Main Results:

  • 73.8% of flaps had DF, 26.2% had IF.
  • Similar immediate flap success (97.3% DF vs. 92.6% IF) and limb salvage rates (75% DF vs. 66.7% IF) were observed.
  • The IF group had a significantly higher rate of contralateral amputation (26.9% vs. 5.3%).
  • Pedicled flaps predominantly received DF/AC, while random flaps utilized RC.

Conclusions:

  • Alternative revascularization routes can support local flap viability and limb salvage.
  • Indirect flow patterns, while maintaining flap viability, are associated with an increased risk of contralateral amputation.
  • Pedicled and muscle flaps necessitate direct inline flow or arterial-arterial connections, whereas random pattern flaps can be supported by random collaterals.