Background: Prospective evaluation of rectus abdominis muscle function after deep inferior epigastric artery perforator (DIEP) flap breast reconstruction is limited. Elimination of muscle harvest with this procedure is theoretically associated with preservation of rectus abdominis function and minimization of abdominal wall morbidity. In this study, the authors evaluate the change in rectus abdominis muscle size and function after DIEP flap surgery. Methods: Patients undergoing unilateral DIEP flap surgery were recruited prospectively. Using computed tomography, the change in preoperative to postoperative rectus abdominis muscle size was compared between the operative side rectus abdominis muscle and the contralateral, nonoperative control rectus abdominis. Postoperative muscle integrity and contractility were evaluated using ultrasound by comparing the change in rectus abdominis muscle dimensions between contractile and relaxed states. The BREAST-Q was used to score patients' subjective satisfaction. Clinical and radiographic hernia rates were also calculated. Results: Analysis of 26 paired rectus abdominis muscles revealed no significant change in muscle size from preoperative to postoperative values. Furthermore, dimensional change from contractile to relaxed states postoperatively was similar for paired operative and nonoperative rectus abdominis muscles. BREAST-Q scores indicated a high degree of satisfaction in abdominal well-being, breast satisfaction, and surgical experience domains. There were no clinical or radiographic abdominal wall hernias noted. Conclusions: The DIEP flap is an effective surgical procedure with minimal abdominal wall morbidity that is associated with no measurable loss in rectus abdominis size and contractile function postoperatively. Patients are highly satisfied with their abdominal function postoperatively using this technique. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV.https://ift.tt/2KgUQvL
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