Abstract

The extended latissimus dorsi (ELD) musculocutaneous flap is one of the surgical techniques used for breast reconstruction. Preoperative preparation to determine the exact amount of flap tissue to be harvested is important to achieve a good outcome with autologous tissue reconstruction. However, few reports exist on objective preoperative volume prediction of ELD flaps. The purpose of this study was to quantify the elevated ELD volume as a preoperative plan. Patients who underwent immediate or delayed breast reconstruction with ELD flap after mastectomy between March 2015 and January 2022 are included. (1) The ELD flap was designed preoperatively, X-ray contrast thread was applied along the design, and CT imaging was performed in the same lateral supine position as the surgical position. 3D images were constructed, and the volume-rendering method was used to obtain the integrated volume. (2) Intraoperative ELD flap volume was calculated using the water displacement method. The correlation between (1) and (2) was examined. (1) The mean preoperative predicted value was 290.2 mL and (2) the mean intraoperative ELD flap volume was 298.3 mL. The correlation coefficient between the two volumes was 0.93, indicating that they were correlated. We could quantify the ELD flap volume using the volume-rendering method with X-ray contrast threads. This study could be a useful method for preoperative prediction planning of the ELD flap in breast reconstruction. This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

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