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Background The aim of this study is to analyze the impact of the number and location of perforators harvested and the recipient vessels used on deep inferior epigastric perforator (DIEP) flap survival and the occurrence of flap necrosis requiring re-operation.  Patients and Methods Four hundred and seventy-one DIEP flap reconstructions, performed between January 2008 and December 2019, were retrospectively analyzed.  Results Flap necrosis requiring re-operation was observed in 40 (9%) of flaps and total flap loss rate was 1% (n = 6). No significant differences were observed between internal mammary vessels (IMV, n = 287, 61%) and thoracodorsal vessels (TDV, n = 184, 39%) regarding postoperative re-anastomosis (p = 0.529) or flap survival (p = 0.646). Intraoperative conversion from IMV to TDV was performed on 64 (14%) patients. TDV were more commonly associated with problems in preparation of the vessels than IMV (p   30 (odds ratio [OR]: 2.28; 95% confidence interval: 1.06–4.91, p = 0.035) and perforator/s located on the lateral row (OR: 3.08, 95% CI 1.29–7.33, p = 0.011).  Conclusion We conclude that the occurrence of flap necrosis requiring re-operation may be higher in DIEP flaps with more than two perforators or perforator/s located on the lateral row and in obese patients. Neither the recipient vessels used nor the number of perforators harvested had any impact on the flap survival rate.

Necrosis or Flap Loss After Deep Inferior Epigastric Perforator Reconstruction: Impact of Perforators and Recipient Vessels