Objective To observe the efficacy of application of PFNA (Proximal Femoral Nail Antirotation) in treatment of intertrochanteric fractures. Methods Clinical data of 93 intertrochanteric fracture patients who had been treated in the hospital from June 2011 to June 2012 were retrospectively analyzed. Among all the patients, 40 cases were ifxated internally through EPFN (Expandable Proximal Femoral Nail), which was the EPFN group; 53 cases were fixated internally through PFNA, which was the PFNA group. Both the methods were evaluated and compared from the perspective of surgical efficacy, postoperative pain, the incidence of improper operation and clinical efficacy. Results The mean healing time, postoperative activity time, Harris hip scores between two groups had no statistically significant differences (P>0.05). The PFNA group demonstrated its superiority over EPFN group in the aspects of average operation time, blood loss, improper operation and thigh pain. The statistically signiifcant differences existed in the above indexes between the two groups (P<0.05). Conclusion PFNA proved its advantages in easy operation, convenience and proximity to the biomechanics of the proximal femur, which minimized the operation errors, reduced postoperative pain and was worthwhile to be promoted.%目的：观察股骨近端抗旋髓内钉（PFNA）内固定治疗股骨转子下骨折的方法及疗效。方法回顾性分析我院2011年6月～2012年6月93例股骨转子间骨折患者的临床资料，其中40例采用股骨近端膨胀髓内钉（EPFN）进行内固定，为EPFN组；53例采用PFNA进行内固定，为PFNA组，对两组手术效果、操作不当发生率、患者术后疼痛及临床疗效进行评价。结果两组平均骨折愈合时间、术后平均下床时间、髋关节Harris评分比较差异无统计学意义（P＞0.05）。PFNA组平均手术时间短于EPFN组，平均出血量少于EPFN组，操作不当及大腿疼痛发生率低于EPFN组，差异均有统计学意义（P＜0.05）。结论PFNA具有操作简单、方便快捷的优点，更符合股骨近端生物力学的要求，可最大限度地避免操作失误，减轻患者术后疼痛，值得推广。
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