Predicting and planning for SIEA flap utilisation in breast reconstruction: An algorithm combining pre-operative computed tomography analysis and intra-operative angiosome assessment.

BACKGROUND: Low flap complication rates and excellent aesthetic outcomes are now commonplace in breast reconstruction. As a result, attention is now being focussed on minimising donor site morbidity. Despite its potential donor site advantages, the superficial inferior epigastric artery (SIEA) flap is often discounted, given concerns about the high flap failure rates. In this study, we present our experience of using the SIEA flap in breast reconstruction and provide an algorithm based on pre-operative computed tomography angiography (CTA) to aid pre-operative planning. METHODS: A retrospective analysis of SIEA flap breast reconstruction cases performed at our unit between 2009 and 2016 was performed and outcomes were assessed. In addition, the patients' pre-operative CTA images were assessed and compared to those of a matched group of patients who underwent deep inferior epigastric artery perforator (DIEP) flap breast reconstruction. RESULTS: Twenty-six patients who underwent SIEA flap breast reconstruction were eligible for inclusion. No flaps were lost. Donor site seroma rate was 20%. The largest SIEA diameter in those who underwent an SIEA flap was significantly larger (p = 0.0001) than in those who underwent DIEP flap breast reconstruction. Significantly more number of patients who underwent SIEA flap breast reconstruction had a SIEA diameter greater than or equal to that of the largest DIEP flap perforator (p = 0.0001) in the group where a DIEP flap was used for breast reconstruction. CONCLUSION: High success rates can be achieved with abdominal flaps based on the superficial vascular system and careful pre- and perioperative assessment of patients.