Objective:To evaluate the effect of encircled fixer of shape memory alloy on bone fracture. Methods:A total of twenty patients with eighteen males and two females was studied. There were three patients with fractares in the upper one third of thighbone, five with fractures in the middle part of thighbone, six with humeral fractures, three with collarbone fractures,one with ulna fracture and two with thighbone fractures as complication of artificial hipbone arthroplasty. After exposure and fixation of fracture ends, prepared encircled fixer was inserted into 0～4℃ normal reline(NS) to lower its temperature, then pulled out with a clamp. Encircled fixer was put on the tersile side of the fractured bone(center pointed to fracture line), restored and stabilized after raising temperature in 40℃ NS. Results: Encircled fixers of shape memory alloy were used to treat twenty patients with bone fracture.Clinical concrescence was obtained in 1.5 to 3 months after operation,and the joint gained its normal function without complication. Conclusion:Encircled fixer of shape memory alloy has features as exerting vertical pressure continoulsy, little stress shield effect and convenient manipulation, especially adapt to stem fracture after artificial arthroplasty.
背景:难复性股骨转子间骨折往往无法通过牵引床牵引得到良好的复位,需要切开或者应用其他微创复位技术进行辅助复位。目的:探讨侧卧位牵引复位股骨近端防旋髓内钉固定对难复性股骨转子间骨折的复位效果。方法:回顾性分析2013年5月至2015年8月收治的84例难复性股骨转子间骨折患者的资料,均为新鲜骨折,骨折按AO分型:A2型26例,A3型58例。根据骨折复位方法的不同,分为侧卧位手法牵引复位组(A组)和平卧位牵引床牵引复位组(B组),每组42例。分析比较2组患者骨折复位质量、闭合复位失败率、术中失血量、手术时间、透视次数、骨折愈合时间及术后1年Harris评分。结果与结论:(1)A组患者复位效果优于B组,手术时间减少了13 min,术中出血量减少了50.65 m L,透视次数减少了18.59次,术后1年Harris评分增加了10.58分,2组比较差异有显著性意义(P<0.05);(2)提示对于难复性股骨转子间骨折,侧卧位手法牵引复位股骨近端防旋髓内钉固定可以缩短复位操作时间,减少术中血液丢失,提高复位质量,较牵引床复位更有优势。
