Results of Subtrochanteric Femoral Fractures Fixation by Proximal Femoral Locking Compression Plate.

Abstract

The treatments of subtrochanteric femoral fractures are a challenge. It accounts about 10.0% to 34.0% of all hip fractures with a high complication rate. This area consists of mostly cortical bone with high stress generation thus heal slowly. The fracture is too proximal to adequately control with implants for femoral shaft and too distal to control with implants for intertrochanteric fractures. The intrinsic insecurity of this fracture and forces of the muscles with comminuted medial calcar is giving the fracture a tendency to varus crumple. Extramedullary implants are associated with higher rate of implant failure while intramedullary nails are not suitable for short proximal segment and wide medullary canal. Recently proximal femoral locking compression plate (PF-LCP) has been applied in treatment of proximal femur including subtrochanteric fractures. It has an excellent result in respect of union, fewer complications and early rehabilitation. The aim of this study was to assess the rate and time taken for union of fractures by PF-LCP and determine perioperative parameters. This prospective study was conducted from March 2019 to September 2020 at Mymensingh Medical College Hospital through non randomized purposive sampling. Total 25 patients aged above 18 years irrespective of sex with closed subtrochanteric fracture were included but pathological fractures, multiple injuries were excluded from the study. Union status evaluated by Radiographic Union Score for Tibial (RUST) fracture of Whelan; where antero-posterior and lateral radiographs (X-ray) based assessment of healing of the four cortices done. The entity cortical scores were added to give an entire score; 4 being the least amount demonstrating fracture are positively not healed and 12 being the highest score representing that the fracture is positively healed. The mean age of the patients was 42.04±14.97 years with range 22-70 years. Majority of patients were male (60.0%) and most of injury (64.0%) due to road traffic accident with most fractures was Seinsheimer type III (48.0%). Average operative time was 121.92 minutes, follow up period was 41.12 weeks (24-48 weeks) and time taken for union was 14.16 weeks (11-28 weeks). According to RUST scores; fracture union rate 88.0% with delayed union 12.0% and no nonunion. There were two patients with superficial wound infection and no implant failure. This study concludes that PF-LCP is a safe and reliable implant for the treatment of subtrochanteric femoral fractures.