Experiences with different techniques of microvascular anastomosis

Area of Science:

• Vascular Surgery
• Microsurgery
• Surgical Techniques

Background:

• Microvascular anastomosis is crucial for reconstructive surgery.
• Debate exists regarding the benefits of oblique anastomosis and adventitial stripping.
• Standardization of techniques for small vessel repair remains a challenge.

Purpose of the Study:

• To compare the efficacy of different microvascular anastomosis techniques.
• To evaluate the impact of adventitial stripping on vessel patency and complication rates.
• To determine optimal surgical methods for varying vessel diameters.

Main Methods:

• Microvascular end-to-end anastomoses were performed on aortas (1.4 mm) and femoral arteries (0.7 mm) in 80 Wistar rats.
• Techniques included transverse/oblique division with/without adventitial stripping.
• Histologic studies were conducted at 5 hours and 3 weeks post-procedure.

Main Results:

• All aortic anastomoses were patent at 5 hours; no differences were seen at 3 weeks between transverse techniques.
• Oblique anastomoses with adventitial stripping in aortas led to false aneurysms.
• Femoral artery anastomoses showed high patency for transverse without stripping; oblique without stripping also patent.
• Adventitial stripping in femoral arteries resulted in a high percentage of false aneurysms.

Conclusions:

• Oblique division and adventitial stripping do not significantly improve microvascular anastomosis patency in vessels <1 mm.
• Adventitial stripping is associated with a high incidence of false aneurysms.
• Transverse anastomosis without adventitial stripping appears reliable for both large and small vessels in this model.