Du Dajiang, Liu Zhen, Omori Shinsuke, Kurita Masahiro, Tomita Tetsuya, Sugamoto Kazuomi, Yoshikawa Hideki, Murase Tsuyoshi
Department of Orthopaedic Surgery, 2nd Affiliated Hospital of Harbin Medical University, Harbin, China; Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Japan.
Int J Med Robot. 2014 Sep;10(3):325-31. doi: 10.1002/rcs.1533. Epub 2013 Sep 13.
Closed reduction is of great benefit for fracture healing. However, achieving this without sacrificing the reduction accuracy and exposing the surgeon and patient to excessive radiation is difficult.
A novel parachute guiding system (ParaEx System) was developed for closed reduction of fractures based on computed tomography data. The system included two counter guides with stainless tubular markers that could be attached to the unilateral external fixator. Comminuted tibial diaphyseal fracture models were used to validate the ParaEx System.
The mean errors (and standard deviations) of residual rotational and translational deformity were 0.67° ± 0.45°, 0.92° ± 1.00°, and 0.64° ± 0.50° in rotation and 1.30 ± 1.10 mm, 1.13 ± 0.70 mm, and 0.94 ± 0.92 mm in translation about the X, Y, and Z axes of the local coordinate axes, respectively.
The ParaEx System was useful for accurate closed reduction of fractures at low cost.
闭合复位对骨折愈合大有裨益。然而，在不牺牲复位精度且不让外科医生和患者遭受过多辐射的情况下实现这一点却很困难。
基于计算机断层扫描数据开发了一种用于骨折闭合复位的新型降落伞引导系统（ParaEx系统）。该系统包括两个带有不锈钢管状标记物的反向导向器，可连接到单侧外固定器上。使用粉碎性胫骨干骨折模型对ParaEx系统进行验证。
在局部坐标轴的X、Y和Z轴上，旋转方向残余旋转和移位畸形的平均误差（及标准差）分别为0.67°±0.45°、0.92°±1.00°和0.64°±0.50°，移位方向分别为1.30±1.10mm、1.13±0.70mm和0.94±0.92mm。
ParaEx系统有助于以低成本准确闭合复位骨折。
