A Hemodynamic Study of the Effects of Arterial Anastomoses With Interrupted Simple Versus Horizontal Mattress Sutures on Rat Epigastric Flap Perfusion

Abstract: The effects of interrupted simple versus horizontal mattress sutures and of the internal diameter of the arterial pedicle at thelevel of the anastomosis on rat epigastric flap perfusion wereinvestigated. In the first group, a microclip was applied to thefemoral artery for 30 minutes. In the second group, the artery wascut, and a classic 7- to 8-suture microarterial end-to-end anastomosis was performed. In the third group, the artery was cut, and amicroarterial end-to-end anastomosis with 3 horizontal mattresssutures at 120-degree intervals was performed. Perfusion was measured using a laser Doppler flowmeter (Periflux 2B, Perimed, Sweden) at 3 zones of the flap at 30 and 60 minutes and at 21 days afterthe procedure. Internal vascular diameters were measured histopathologically. Perfusion was better in the control group than inthe experimental groups. However, the internal vascular diameterswere greater with the classic method than with the new method, andthe perfusion did not differ statistically in the anastomosis groups. Inconclusion, even when significant narrowing develops at the anastomosis, flap viability is not affected.Key Words: microsurgery, microvascular surgery, vesselanastomosis, vascular anastomosis method, internal vasculardiameter, perfusion, rat epigastric flap, laser Doppler flowmeter

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