ABSTRACT
This study reports the outcome in pertrochanteric and subtrochanteric femoral fractures in 25 patients treated by using PFN. Salvati and Wilson hip function scoring system and Kyle's criteria were used for follow up evaluation. At the end of 24 weeks follow up the Salvati and Wilson hip function was 32 (out of 40) in 88% of patients, the Kyle's criteria described the outcome as good or very good in 92% of patients and the level of function was similar to pre-injury level in 90% of patients. Distal locking difficulty was encountered in 3 cases. Difficulty in placement of neck screw was encountered in 4 cases. Secondary varus was noted in 3 cases and in 1 patient antirotational screw cut through was seen.However all fractures united well in all the patients.PFN was designed by AO/ASIF in 1996 for the treatment of peritrochanteric fractures.It combines the intrinsic advantages of the intramedullary nail and those of sliding screw is a valid and an important option in the treatment of pertrochanteric and subtrochanteric femoral fractures. It is a relatively easy procedure, a bio mechanically stable construct and a minimally invasive device; especially ideal in compromised elderly patients who are the majority population suffering from these type of fractures.With incorporation of single helical blade in place of two proximal screws in PFN, AO/ASIF has further enhanced the treatment modalities by devising PFNA (Proximal Femoral Nail Antirotation).