Nylon and polydioxanone are two sutures commonly used to correct rectus diastasis. Polydioxanone, as an absorbable suture, has the advantage of not being palpable in thin patients. Because several forces act against the plication, an absorbable suture would not be efficient in these cases. In this study, two groups of 10 patients each were studied. These patients underwent abdominoplasty and correction of rectus diastasis. In the control group, 2-0 nylon was used to plicate the anterior aponeurosis and 0-polydioxanone was used in the experimental group. The tension of the abdominal wall was measured with a dynamometer in both groups. The width of rectus diastasis was measured 3 cm above and 2 cm below the umbilicus, using a computed tomography (CT) scan before the operation and 3 weeks and 6 months after surgery. The width of rectus diastasis was measured intraoperatively at the same levels. The data were analyzed by Student's t test. Both groups had similar abdominal wall tension on both levels. The diastasis recti was completely corrected at both levels, as confirmed by the 3-week postoperative CT scan and the 6-month CT scan. At the superior level, the width of the rectus diastasis on the preoperative CT scan (2.6 +/- 0.7 cm) was similar to the values obtained intraoperatively (2.7 +/- 0.6 cm), showing no significant statistical difference. At the inferior level, the largest difference between the preoperative CT scan and the intraoperative finding was 0.3 cm. In conclusion, the correction of rectus diastasis with 2-0 nylon and 0-polydioxanone was achieved and maintained after 6 months. CT scans are an accurate method for studying rectus diastasis and other muscles of the abdominal wall.
The plication of the anterior rectus sheath is a procedure that is performed by most surgeons during abdominoplasty. A main concern is whether the correction of recti diastasis is really effective and if it is stable. In order to verify the position of the rectus muscle, a CT-scan was used in 14 patients who underwent abdominoplasty with rectus plication to compare the preoperative situation of these muscles with their position 3 weeks and 6 months postoperatively. None of these patients had had previous abdominal surgery. The recti diastasis was corrected with a two-layer 2-0 Nylon suture. A dynamometer was used to measure the resistance force of the anterior aponeurosis of the rectus. In all cases the CT data shows that correction of the diastasis was achieved completely after 6 months.
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