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Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : Medial pelvic migration of the lag screw in a short gamma nail after hip fracture fixation: a case report and review of the literature | Li et al. Journal of Orthopaedic Surgery and Research 2010 5 62 http www.josr-online.eom content 5 1 62 JOURNAL OF ORTHOPAEDIC SURGERY AND RESEARCH CASE REPORT Open Access Medial pelvic migration of the lag screw in a short gamma nail after hip fracture fixation a case report and review of the literature Xinning Li Michael J Heffernan Christina Kane Walter Leclair Abstract Hip fractures are a common injury among the elderly. Internal fixation with an intramedullary IM system has gained popularity for the treatment of intertrochanteric femur fractures. Multiple complications associated with IM fracture fixation have been described however we report a rare complication of medial pelvic migration of the lag screw of a short IM nail in a stable construct ten weeks post surgery. The patient was subsequently treated with Lag Screw removal and revision surgery with a shorter Lag Screw and an accessory cannulated screw acting as a de-rotational device. The patient did well with the revision surgery and was able to return to full activities. Background Hip fractures are a common injury among adults ages 65 and older occurring in approximately 300 000 individuals yearly 1 2 . An estimated 1.66 million hip fractures occurred worldwide in 1990 and the number is expected to increase to 6.26 million by the year 2050 3 . Internal fixation with an intramedullary IM system has gained popularity for the treatment of intertrochanteric femur fractures. This construct provides both load sharing properties while allowing immediate mobilization 4 5 . Complications of IM hip fracture fixation include but not limited to infection mal or non union avascular necrosis hardware failure neurovascular injuries fracture of the femur distal to the implant and death 3-5 . A common complication associated with the IM system is lag screw cut-out from the femoral head which leads to varus collapse of the fracture and non-union 6-8 . Other rare complications related to the lag screw include medial .
