Augmentation of elastic stable intramedullary nail with external fixator in the management of comminuted shaft femur fracture in adolescents

Background: The management of adolescent femur fractures continues to evolve and remains controversial. Currently, operative fixation methods are favoured, offering options such as external fixator, flexible and locked intramedullary nailing, compression and locked plating. Our study aims to introduce a novel approach for treating adolescent femoral shaft fractures by combining an external fixator with an elastic stable intramedullary nail. Material and methods: We included 32 patients aged 11-16 years with femoral shaft fractures treated using an external fixator augmented elastic intramedullary nail at our institution from August 2015 to January 2019. Results: All patients achieved bony union. We analysed patient's results both clinically and radiologically. On average, the surgery took 77.34 minutes to complete with an average time to union of 13.9 weeks. External fixator and elastic nail removal took an average of 3.59 months and 26.5 months, respectively. At the final follow-up, knee range of motion averaged 131.88 degrees. According to the Flynn criteria, functional outcomes were excellent in 18 patients, satisfactory in 11 patients and poor in 3 patients. Pin site infection occurred in 3 patients, malunion in 4 patients, limb length shortening < 1 cm in 3 patients, distal nail tip prominence and knee stiffness in 3 patients. Conclusion: The management of femur fractures in adolescents using an elastic nail augmented with an external fixator is a minimally invasive procedure that provide secure fracture stabilization and predictable outcomes.