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Background: Quilting sutures attaching the abdominal flap to the aponeurosis contribute to the prevention of seroma formation following abdominoplasty. The sutures distribute the tension over the subcutaneous tissue along the flap length, theoretically decreasing tension at the distal (cutaneous) end of the flap. This is expected to reduce the risks of necrosis, dehiscence, and enlarged or hypertrophic scars., Objectives: This study sought to verify whether quilting sutures decrease the tension required to advance the dermal-fat flap in abdominoplasty., Methods: Thirty-four women undergoing abdominoplasty with quilting sutures participated in the study. The tensile force required for flap advancement was measured with a digital force gauge before and after placement of quilting sutures and then compared. Differences in tensile force were tested for correlations with BMI, age, weight of flap tissue removed, number of previous pregnancies, and postoperative complications, including seroma formation, hematoma, necrosis, dehiscence, and enlarged or hypertrophic scars., Results: A mean reduction in tension of 27.7% was observed at the skin suture after the placement of quilting sutures (P < 0.001). No significant correlation was found between reduced flap tension and BMI, age, weight of tissue removed, or number of births. One case of seroma formation and 2 cases of enlarged scars were observed, but no case of hematoma, necrosis, or wound dehiscence was detected., Conclusions: The use of quilting sutures to attach the abdominal flap to the aponeurosis of the anterior abdominal wall reduced tension at the advancing edge of the flap in abdominoplasty., (© 2021 The Aesthetic Society. Reprints and permission: journals.permissions@oup.com.)