~ 569 ~ International Journal of Orthopaedics Sciences 2020; 6(2): 569-571 E-ISSN: 2395-1958 P-ISSN: 2706-6630 IJOS 2020; 6(2): 569-571 © 2020 IJOS www.orthopaper.com Received: 22-02-2020 Accepted: 24-03-2020 Dr. Narendra Singh Butola Junior Resident, Department of Orthopedics, HIMS, SRHU, Uttarakhand, India Dr. Anit KS Deane Associate Professor, Department of Orthopedics, HIMS, SRHU, Uttarakhand, India Dr. Chetan Peshin Associate Professor, Department of Orthopedics, HIMS, SRHU, Uttarakhand, India Dr. Faiz Akbar Siddiqui Assistant Professor, Department of Orthopedics, HIMS, SRHU, Uttarakhand, India Corresponding Author: Dr. M Krishna Chaitanya Assistant Professor, Department of Orthopedics, HIMS, SRHU, Uttarakhand, India Study on final neck shaft angle achieved after surgical correction of pertrochanteric fractures of femur Dr. Narendra Singh Butola, Dr. Anit KS Deane, Dr. Chetan Peshin and Dr. Faiz Akbar Siddiqui DOI: https://doi.org/10.22271/ortho.2020.v6.i2i.2100 Abstract Introduction: Pertrochanteric fractures are defined as “Fractures occurring in the region extending from the extracapsular basilar neck region to the region along the lesser trochanter proximal to the development of medullary canal”. Incidence of pertrochanteric fractures increase with increase in the age of population and quite often results in the end of patient’s functional independence. Management of pertrochanteric fracture depends on patient’s medical condition, quality of bone and the fracture biomechanics. The main goal of this study is to assess and compare the NSA in surgically fixed pertrochanteric fracture of femur at time of surgical fixation and compare it with final NSA attained at time of fracture union. Material & Method: This Observational and prospective study was conducted over a period of 1 year and includes 100 cases of pertrochanteric fractures with mature skeleton. X-ray of pelvis with both hips AP view was taken after fixation of fracture using standard protocol. Measurement of NSAs in the operated hips was done using postoperative digital X - ray films with help of Bersoft image measurement software trial version 8.49. Data was analyzed for NSA in non-fractured limb and the restoration/change in NSA in operated hip after surgical fixation and in follow up period. Result: In our study, the statistical analysis showed that mean NSA after immediate post op was 130.445 ± 11.1976, after 6 weeks was 128.586 ± 11.1954 and 127.305 ± 9.9472 at union. Conclusion: Irrespective of fixation method used (DHS/PFN), NSA significantly changes during first 6 weeks in the post op period and after 6 weeks it remains unaffected and fracture become relatively stable. Therefore it can be concluded that there is no need to delay mobilization past 6 weeks of surgery. Keywords: Pertrochanteric, neck shaft angle (NSA) Introduction The angle between femur neck and the long axis of shaft is known as neck shaft angle (NSA). NSA plays vital role in stability, control of lateral balance; walking and hip movements. Evaluation of NSA of femur is useful in understanding biomechanics of the hip joint. It helps in the planning of treatment of various affections of hip region and also in designing prosthesis for this region [1] . According to a study on Indian population, average femoral neck length in adults is approximately 5 cm long and average NSA is approximately 135 degree [2] . Different ethnic groups have different build; physique, habits and genetic makeup, and possibly anthropometric measurements of proximal femur that are described normal for western population can differ from the measurements seen amongst Indian population [3] . Material and Methods This study was carried out in the Department of Orthopedics at Himalayan Institute of Medical Sciences, Swami Ram Nagar, Dehradun over a period of 12 months. Total 100 cases of pertrochanteric fractures fulfilling the inclusion criteria are included. The Exclusion criteria 1. Pertrochanteric fractures in patients with an immature skeleton. 2. Patients with an existing condition affecting NSA e.g. congenital deformity (DDH), Perthe’s disease, old fracture/ operated cases of neck of femur or intertrochanteric fracture, infective and neoplastic pathologies etc.