Exploring Appropriate Positioning of the Spiral Blade in Treatment of Subtrochanteric Fractures of the Femur Using Proximal Femoral Nail Antirotation

In our cohort, use of PFNA internal fixation for treatment of unstable femoral subtrochanteric fractures and placement of the spiral blade in the middle or lower 1/3 of the femoral neck did not increase the incidence of complications. Therefore, we propose that the TAD rule of 20-30 mm should not apply to subtrochanteric fractures, and TAD and Cal-TAD should be controlled within the range of 20-25 mm to reduce the incidence of complications.