• Dr Ashok Gavaskar, Dr Parthasarathy Srinivasan, Dr Balamurugan J, Dr Rufus V Raj, Dr Krishna Sagar, and Dr Kirubakaran P.
• Rela Institute of Orthopedics, RIMC, Chennai, India. Electronic address: Gavaskar.ortho@gmail.com.
• Injury. 2021 Jul 1; 52 (7): 2010-2015.

AbstractAn entry point medial to the tip of the greater trochanter is considered optimal for antegrade femur nailing. The deforming forces in a subtrochanteric fracture often make it difficult to establish a perfect entry point during antegrade cephalomedullary nailing. To overcome this problem, we report a simple technique of making a retrograde entry portal for select difficult subtrochanteric fractures. The technique was used in 12 subtrochanteric fractures. Our indications were morbid obesity, revision nailing and atypical fractures. The technique involves creating a nail entry portal through the fracture from distal to proximal taking advantage of the abducted proximal fragment. Fracture reduction and nail insertion then proceeds in a standard manner. Additional reaming of the thick endosteal lateral cortex through the fracture was performed in atypical fractures. Satisfactory fracture reduction was achieved in all patients and 11 out of the 12 fractures united in the series. 1 patient developed an infected nonunion and was considered failure of treatment. The retrograde entry portal is a valuable alternative method that can be considered in nailing of difficult subtrochanteric fractures to establish an ideal entry point and nail trajectory.Copyright © 2021 Elsevier Ltd. All rights reserved.

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