Blood flow through prefabricated flaps--an experimental study in rabbits

Area of Science:

• Plastic surgery
• Regenerative medicine
• Vascular biology

Background:

• Tissue engineering and reconstructive surgery often face challenges with flap survival and vascularization.
• Prefabricated flaps offer a potential solution by pre-establishing a vascular network before transfer.

Purpose of the Study:

• To evaluate the optimal timing for successful transfer of prefabricated flaps in a rabbit model.
• To assess the neovascularization process within these flaps over time.

Main Methods:

• Creation of prefabricated flaps by implanting femoral vessels beneath the abdominal skin in rabbits.
• Measurement of flap survival area and blood flow at serial intervals (1, 2, 4, 6, 8, 12 weeks).
• Assessment of neovascularization using microangiography.

Main Results:

• Prefabricated flaps showed significantly improved survival and blood flow at 6, 8, and 12 weeks compared to random pattern flaps (p < 0.01).
• However, parameters remained significantly lower than axial pattern flaps (p < 0.01).
• Successful flap transfer was achieved between 6 and 8 weeks, with neovascularization observed by 8 weeks.

Conclusions:

• A 6-8 week interval is critical for successful transfer of these prefabricated flaps in rabbits.
• Neovascularization progresses from the distal end of the vascular bundle, fully integrating by 8 weeks.
• Prefabricated flaps demonstrate promising potential for reconstructive applications, though further optimization may be needed.