O1012 EXPERIENCE WITH THE INTRAMEDULLARY HIP SCREW IN THE TREATMENT OF INTER- AND SUBTROCHANTERIC FRACTURES

Abstract

Aims: This study reports a retrospective review of notes and x-rays of 45 patients who underwent fixation of inter- and subtrochanteric fractures of the femur with the Intramedullary Hip Screw. Methods: 45 consecutive patients who underwent IMHS fixation between 1998 and 2001. Diagnoses: 24 intertrochanteric- and 15 subtrochanteric fractures, 2 prophylactic nailings for metastases, 4 reoperations for previously failed DHS/DCS. Data collected from patient notes included the intra-operative use of skeletal- vs. ski-boot traction, intra- and postoperative complications. X-ray review included classification of the fractures, grading of osteoporosis, measurement of neck-shaft angle, screw position in the femoral head, and distance from the screw to the nearest cortex. Results: The rate of intraoperative complications was 8,8%, post-operative complications occurred in 13,3% of the patients. The mortality rate within the first 3 months was 15,5%. Re-operations were necessary in 4,4% of the patients. The sliding screw was positioned in the middle sector of the femoral head in the coronal plane in 17 patients and in the sagittal plane in 14. Superior position occurred in 18 cases, inferior in 4, anterior in 4 and posterior in 16 patients. Conclusions: The main complication in our series was screw cut-out from the femoral head. This occurred in 4 patients, 2 of whom were previously failed DHS/DCS fixations. There was no single factor predicting implant failure. The results for primary fixations are comparable to most reported series in the literature and show that the outome is dictated by the original fracture pattern. There is a high failure rate if the implant is used for revision procedures.