旋入式自锁髓内钉的研制及临床研究

The Design and Clinical Study of Rotary Self locking Intramedullary Nail

目的 为临床治疗长骨干骨折提供快捷、有效的治疗方法。设计一种组合式髓内钉———旋入式自锁髓内钉 (旋入钉 ) ,方法 旋入钉是以旋转进钉、髓内填充式纵向交锁为设计特点的髓内固定系统 ,其结构由主钉和锁针组成 ,1994年 6月至2 0 0 0年 6月已应用该钉治疗长骨干骨折共 98例、 10 4侧骨折。采用闭合复位固定 36例 ,占 36 % ;6个月以上随访 6 4例。结果 骨折全部愈合 ,平均愈合时间 16周 ,半年内骨折愈合率 95 % ,畸形愈合 2 % ,感染 2 % ,功能恢复优良率 94 6 % ,无继发骨折短缩分离和金属断裂发生。结论 旋入钉具备轴向加压、抗短缩、抗分离和抗扭转的功能 ,其结构简单 ,手术操作简便、创伤小 ,疗效可靠 ,具有广泛的适应证及临床应用前景 。

Objective To design a new type of rotary self locking intramedullary nail (RSIN) systems for the treatment of fracture of the femur, tibia and humerus Methods RSIN is composed of a main nail and a locking pin There are screw threads on the ends of the main nail, the main nail is rotated into medullary canal by the screw thread The locking pin is inserted into canal through a trough on the main nail and branch on distal medullary, the distal branch and proximal fin of the pin chock and fill in the medullary to form longitudinal interlocking (self locking) fixation From 6 1994 to 6 2000,98 cases of fractures were treated with RSIN Thirty six of 98 cases were treated in closed nailing (36%) ,64 were followed up over half a year Results All of fractures healed up, the time for fracture union was average 16 weeks, 95% healed up within 6 months, 2% deformity union, 2% infection Evaluated according to the criteria of Klemm, the total excellent and good rate was 94 6% There were no broken nail and axial shortening or division displacements.Conclusion RSIN is a system of design for widespread indication, it is stable enough to resist shortening division or rotation of fracture segments The intramedullary longitudinal locking is easy to operate, and X ray guidence is not neccessory during the procudure