Are antithrombotic agents necessary for head and neck microvascular surgery?

Area of Science:

• Plastic Surgery
• Vascular Surgery
• Oncology

Background:

• Head and neck reconstructive surgery, particularly free flap procedures, carries a risk of microvascular thrombosis.
• Antithrombotic agents are commonly considered to mitigate this risk.
• Evidence supporting their efficacy in this specific surgical context requires further clarification.

Purpose of the Study:

• To evaluate the effectiveness of different antithrombotic regimens in preventing thrombosis after head and neck free flap surgery.
• To compare the incidence of thrombosis, flap failure, and hematoma among patients receiving different antithrombotic treatments versus no treatment.

Main Methods:

• A prospective randomized clinical trial involving 454 patients undergoing free flap surgery.
• Patients were assigned to three groups: aspirin plus low molecular weight dextran, low molecular weight heparin, or no antithrombotic agent.
• Outcomes including microvascular thrombosis, flap failure, and hematoma were recorded and analyzed using ANOVA and chi-squared tests.

Main Results:

• No statistically significant differences were observed in postoperative microvascular thrombosis or flap failure rates among the three groups.
• The group receiving low molecular weight heparin experienced a higher incidence of postoperative hematoma revisions compared to the other two groups.
• Coagulation parameters were monitored perioperatively.

Conclusions:

• Postoperative antithrombotic agents do not significantly enhance the success rate of free flaps in head and neck reconstruction.
• The use of these agents does not reduce the risk of thrombosis and may increase the likelihood of hematoma formation.
• Current evidence suggests a cautious approach to routine antithrombotic use in this patient population.