Background: Conservative management of intertrochanteric femoral fracture often yields poor therapeutic outcomes, and surgical fixation is generally warranted. Biomechanical instability of intertrochanteric femoral fracture is a major cause of fixation failure. To increase the stability of intramedullary nails in intertrochanteric femoral fracture, it is critical to strengthen the support between the nail and the cortical bone. Our previously designed proximal femoral medial sustainable intramedullary nail has been proven to be able to provide this internal support and stabilization by finite element analysis. We aim to examine the efficacy and safety of internal fixation with this new type of intramedullary nail in the treatment of stable and unstable intertrochanteric femoral fractures. Methods/Design: This will be a single-center, two-arm, parallel, randomized controlled trial conducted at the Chinese PLA General Hospital, China. Seventy-two patients with stable or unstable intertrochanteric femoral fracture diagnosed according to AO/OTA Classification of Fractures and Dislocations will be randomly assigned to receive internal fixation either with proximal femoral medial sustainable intramedullary nails, or proximal femoral nail antirotation. The primary outcome measure will be bone healing condition 6 months postoperatively; secondary outcomes will be requirement for revision surgery, quality of life and complications 1 year postoperatively. Discussion: Our findings will provide an evidence base for the use of proximal femoral medial sustainable intramedullary nails for the treatment of intertrochanteric femoral fracture. Trial registration: ClinicalTrial.gov identifier: NCT01437176; registered on 1 September 2011. Ethics: This protocol was approved by Ethics Committee of Chinese PLA General Hospital of China (approval No. 07/06/2011) and will be performed in accordance with the Declaration of Helsinki formulated by the World Medical Association. Informed consent: Written informed consent will be obtained prior to involvement in the clinical trial.
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