【摘要】 目的通过比较连续周边缝合(Running)、Cross-stitch、Halsted及一种新型肌腱周边缝合方法的生物力学特性,为该方法的临床应用提供理论依据。方法将36根新鲜成年猪后蹄Ⅱ区屈肌腱随机分成4组,分别用连续周边缝合(Running)、Cross-stitch、Halsted及一种新型肌腱周边缝合方法进行修复。将缝合好的肌腱等速拉伸至完全断裂,并用材料力学测定仪(Instron4411)测定2-mm间隙形成负荷、最大负荷,计算断裂功耗。结果新型肌腱周边缝合法的2-mm间隙形成负荷为(53.2±6.0)N、最大负荷为(68.8±6.9)N、刚度为(6.6±0.7)N/mm,为各组中最高;断裂功耗为(0.784±0.075)J与Halsted法相近,高于Cross-stitch及Running法。结论该新型肌腱周边缝合法的生物力学强度高于目前临床应用的Running、Cross-stitch、Hal-sted法,能提供较大的抗张强度、有效抵御间隙形成、操作简便,有利于肌腱早期主被动功能锻炼。更多还原

【Abstract】 Objective To evaluate the biomechanical properties of a new pe ripheral suture technique that was designed by us. Methods Thirty-six porcine f lexor profundus tendons were harvested in zone Ⅱ from adult pig toes and divid ed into four groups. Each group of the tendons were repaired by one of the follo wing peripheral suture techniques: Running, Cross-stitch, Halsted and our newly developed method. All the tendons were pulled to complete failure by an Instron tensile testing machine. 2-mm gap formation force, failure load and energy to failure were investigated and compared among the groups. Results The newly devel oped peripheral suture showed the greatest tensile strength among the groups wit h 2-mm gap formation force at (53.2±6.0) N, failure load at (68.8±6.9) N, a nd stiffness at (6.6±0.7) N/mm. Its energy to failure was (0.784±0.075) J, whi ch was similar to that of Halsted method, but superior to those of Running and C ross-stitch methods. Conclusions The newly developed peripheral suture is stro nger than currently used peripheral suture methods. The technique is recommendab le in repairing flexor tendons when early motion protocols are considered, espec ially when core suture could not be performed confidently.更多还原