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The Impact of Lovenox Prophylaxis and Other Anticoagulants on Microvascular Free Flap Outcomes

  • 0Department of Otolaryngology-Head and Neck Surgery, Oregon Health and Science University, Portland, Oregon, USA.
Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery +

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February 10, 2025

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February 10, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

Lovenox prophylaxis did not improve microvascular free flap survival in head and neck reconstruction but slightly increased hematoma risk. Therapeutic heparin showed higher complication rates, necessitating careful patient counseling regarding anticoagulation.

Area Of Science

  • Plastic Surgery
  • Head and Neck Surgery
  • Vascular Surgery

Background

  • Microvascular free flap reconstruction is crucial for head and neck defects, with a high success rate.
  • Vascular occlusion is a primary cause of flap compromise.
  • The role of prophylactic anticoagulation in optimizing flap outcomes requires further investigation.

Purpose Of The Study

  • To evaluate the impact of enoxaparin (Lovenox) prophylaxis on microvascular free flap outcomes.
  • To assess the effect of enoxaparin on postoperative complications, including flap compromise and hematoma.
  • To compare outcomes between patients receiving enoxaparin, therapeutic heparin, and other anticoagulants.

Main Methods

  • Retrospective review of 1100 patients undergoing microvascular free flap reconstruction at a single tertiary institution (January 2010 - May 2019).
  • Comparison of flap outcomes and complications between patients who received postoperative enoxaparin prophylaxis and those who did not.
  • Analysis of outcomes for patients on therapeutic heparin and other oral anticoagulants using chi-squared tests.

Main Results

  • No significant difference in flap compromise, salvage, or overall failure rates between enoxaparin and no-prophylaxis groups.
  • Equivalent rates of arterial insufficiency and venous congestion between the enoxaparin and no-prophylaxis groups.
  • Therapeutic heparin group exhibited the highest rate of arterial insufficiency (23.85%).
  • Hematoma rates were significantly higher in patients on therapeutic heparin (10.55%) and other anticoagulants (14.55%) compared to enoxaparin (3.77%) and no prophylaxis (2.08%).

Conclusions

  • Enoxaparin prophylaxis does not appear to influence overall microvascular free flap survival in head and neck reconstruction.
  • Enoxaparin use is associated with a slight increase in hematoma risk.
  • Patients requiring therapeutic heparin face higher complication rates.
  • Patients with comorbidities necessitating anticoagulation have a significantly higher risk of hematoma and require thorough counseling.

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