肌腱周边缝合距断端不同距离的缝合对抗张力的比较

目的研究缝针出入点距对合口距离对肌腱修复抗张强度的影响。方法采用新鲜猪后肢跖深屈肌腱,将40根肌腱分为4组,每组10根,横行切断,以改良Kessler法缝合,周边加强,缝针出入点距断端距离分别为4、7、10、12mm,检测缝合后肌腱2mm间隙形成的负荷,最大抗张强度,采用ANOVA进行统计分析。结果对肌腱的横断伤,以改良Kessler法缝合修复时缝针出入点距断端的距离越大,肌腱的抗张强度越强,其中4mm间距抗张强度明显低于其它三组(P<0.05),而其它三组无明显统计学差异。结论肌腱横形损伤修复时,随着缝针出入点距断端的距离增大,其抗张强度有递增趋势。

Comparison of tensile strength between 4 different epitendinous sutures

Objective To evaluate the effects of 4 different epitendinous sutures on the tensile strength of the repaired tendons. Methods 40 plantar flexion deep tendons from pigs were divided into 4 groups randomly, with 10 in each group. After the core suture of Modifier Kessler was applied, 4 epitendinous sutures at different distances from suture sites to broken ends (4mm, 7mm, 10mm, 12mm) were used respectively in each group to repair the transected tendons. MTS Instron 4411 was used to test the repaired tendons. Tensile strengths at 2mm gap formation and at the peak were collected for statistical analyses by ANOVA. Results In this test, the tensile strength was found to increase with the distance from suture sites to broken ends. The tensile strength in the 4mm group was significantly lower than that in the others. There was little statistical difference between the other 3 groups. Conclusion Tensile strength of the repaired tendon tends to increase with the distance from suture sites to broken ends in epitendinous suture.