闭合手法联合斯式针撬拨复位治疗跟骨骨折68例

[目的]探讨闭合手法联合斯式针撬拨复位治疗跟骨骨折的临床效果。[方法]选取2009年6月至2012年3月在本院就诊的SandersⅡ型、Ⅲ型68例(80足)跟骨骨折患者,采用闭合手法联合斯式针撬拨复位治疗,并按Maryland足部评分标准对患者治疗后功能进行评估。[结果]68例患者术后随访9个月,均骨性愈合,Bohler角>30°,未见针道感染、足弓塌陷、距下关节痛等并发症,能正常行走,无跛行。按Maryland足部评分标准评价治疗后功能,优58足,良13足,可8足,差1足,优良率达88.57%。[结论]闭合手法联合斯式针撬拨复位治疗跟骨骨折手术具有微创、操作简便、创伤小、术后并发症少的特点,疗效满意,为治疗跟骨骨折理想的治疗方法之一。

联合应用钢板螺钉和斯式针内固定治疗粉碎性跟骨骨折的临床研究

目的探讨联合应用钢板螺钉和斯式针内固定术在治疗粉碎性跟骨骨折中的临床疗效。方法 48例跟骨粉碎性骨折患者纳入本研究,随机均分为单纯组和联合组,单纯组接受钢板螺钉治疗,联合组接受钢板螺钉和斯式针联合内固定治疗;比较两组患者的手术情况和术后疼痛情况,以及术前术后BOHLER角、GISSANE角、足部功能变化。结果两组患者手术情况并无显著差异(P>0.05),术后BOHLER角、GISSANE角和足部功能恢复联合组优于单纯组(P<0.05)。结论联合应用钢板螺钉和斯式针内固定术治疗粉碎性跟骨骨折术疗效好,值得在临床推广应用。

Effects of pinholes on zerooffset of single-axis normal-tracking measurement system

A single-axis normal-tracking measurement system is proposed, which can solve the problem of measuring large curved surface. According to Collins formula, the tilt dependent error of the measurement system is studied, which uses Gaussian beam as the light source. By theoretical analysis and numerical simulation, the influence of the error is presented. The results show that there is the difference between point source and Gaussian beam for differential confocal microscopy. The opti-mal diameter of pinhole can be determined by the mathematical model and the actual parameters of the measurement system. The optimal pinhole diameter of this measurement system is 20 to 35 pm for 633 nm wavelength light source.