1The Influence of Posterolateral Approach and Direct Anterior Approach on the Position of Anatomic Stems During Primary Total Hip ReplacementTang Yu, Liu Juncai, Chen Jian97-1022The Effect of Expandable Intramedullary Nail in the Treatment of Intertrochanteric Fractures in Elder-ly PatientsGao Jiakai, Wang Taoran, Niu Zhixia103-1073Early Clinical Study of Domestic"Skywalker"Surgical Robot for Knee ArthroplastyXia Runzhi, Tong Zhicheng, Zhang Jingwei108-113,1174Application of Erythrocytapheresis in Patients with High Altitude Polycythemia Underwent ArthroplastyDeng Liqing, Li Jia, Gan Yanfeng114-1175Clinical Study of Spinal Cord Injury on Male Sexual FunctionLi Guangwei, Wang Shaobo, Zhao Wenkui118-121,1266Clinical Characteristics and Pathogenic Bacteria Analysis of 333 Patients with OsteomyelitisFeng Qiangsheng, Song Yuejuan, Ha Xiaoqin122-1267The Relationship Between Blood Lipid and Osteoporotic Fracture in Elderly WomenWu Jian, Zhou Tao, Yu Bing127-130,1368Research on the Correlation between Serum VEGF and VCAM-1 levels and Delayed Healing after Femo-ral Neck Fracture SurgeryJu Xiaochen, Shu Li, Zhou Ling131-1369Effect of N-acetylcysteine on Chondrocyte Matrix Degradation and its Effect on OsteoarthritisZhang Weihua, Zhang Jianye, Ye Heng137-142