Analysis of Vascular Anatomy in Deep Inferior Epigastric Perforator Flap

The deep inferior epigastric artery perforator (DIEP) flap is considered the gold standard in autologous breast reconstruction. One of the existing challenges of the procedure is maintaining a pedicle of suitable length and diameter for flap survival. In this study, we analyzed the vascular anatomy of bi-pedicle DIEP flap cases in terms of the vessel diameter, the rate of secondary venae comitantes, and pedicle length to determine the efficacy of microvascular anastomosis and venous drainage. We retrospectively evaluated 108 patients who underwent immediate breast reconstruction using free bi-pedicle DIEP flaps between 2012 and 2019. The patient characteristics, diameters of the deep inferior epigastric artery (DIEA) and accompanying veins (DIEVs), DIEA pedicle length, vessel re-anastomosis rate, flap failure rate, and fat necrosis were recorded. Comparison of the right side and left side diameters and pedicle lengths obtained showed no significant differences (p > 0.05). A total of 148 sides (68.52%) of flaps had double venous drainage, whereas 68 sides (31.48%) of flaps had one. Vein congestion occurred in 5 cases, and all involved with just one DIEV anastomosis. No arterial occlusions were observed. This is an analysis of extensive clinical data in terms of DIEA, DIEV, and pedicle length. The low vein congestion rate observed reveals adequate venous drainage was achieved in the DIEV system for DIEP reconstruction. Adequate deep inferior epigastric vessel pedicle length and vessel size, as well as greater than 60% of flaps with secondary DIEV, may allow comfortable microsurgery with reduced complications.