BACKGROUND: Total hip arthroplasty has been widely used in clinical practice, and achieved good clinical efficacy. However, with the yearly increased number of patients receiving primary arthroplasty, the number of revision hip arthroplasty patients has increased. However, hip arthroplasty is one of the most difficult hip surgery, and it is challenging. OBJECTIVE: To review the causes of femoral revision of the hip arthroplasty, the classification of the femoral bone defect, and the type of prosthesis available in the clinical revision, and the clinical effect of the different prosthesis, so as to provide reference for femoral revision. METHODS: CNKI, Web of Science, and PubMed were searched for the literatures published between January 1975 and August 2017 with the key words of "Revision total hip arthroplasty, Femur revision, Cemented femoral revision, Cemenless femoral revision Reoperation, Porous-coated stems, Modular, tapered stem, Wagner SL revision Stem". RESULTS AND CONCLUSION: (1) A total of 1 041 articles were retrieved. After reading the abstract, unrelated and repeated studies were excluded. Finally, 109 studies were included. Of them, there were 106 English studies and 3 Chinese studies. Femoral revision was analyzed and summarized. (2) Femoral revision of the hip is still the future challenges facing the joint surgeon. We continue to strive to overcome the direction. Although the current material science and surgical technology are now rapidly developed, only the analysis of the reasons for the revision of the femoral side, identifying the femoral side bone defect classification, mastering the treatment of different defects and the application of the principle of prosthesis type, making reasonable femoral revision program is the key to success according to the patient's age and activity.

Objective To explore the value of somatosensory evoked potential (SEP) and modified cerebral hemorrhage (MICH) scale in prognosing the extremity function of patients with intracerebral hemorrhage (ICH).Methods Eighty-two patients with ICH were measured with SEP and MICH,and modified Rankin scales (MRS) was performed to evaluate the extremity function at 1,3 and 6 months after discharging from the hospital.The predictive value of SEP and MICH was evaluated.Results MRS scores in patients with Zentner grade-Ⅱ and MICH scores＜3 were much significantly higher than those in patients with Zentner grade-Ⅰ and MICH scores ≥3 at 1,3 and 6 months after discharging from the hospital (P＜0.05).For patients having MRS scores≥4 (unfavourable prognosis),Zentner grading standard and MICH scores had predictive sensitivities for unfavourable outcome of 74.2％ and 83.9％,and specificities of 86.3％ and 88.2％,positive predictive value of 76.7％ and 81.3％,and negative predictive value of 84.6％ and 90.0％.Logistic regression indicated that patients with Zentner grade-Ⅱ and MICH scores ≥ 3 had a poor outcome.Conclusion SEP and M1CH may yield information useful for predicting extremity function of patients with acute ICH.The combination of SEP with MICH scale will benefit the early formulate rehabilitation programme and promote the extremity function recovery.