Intraoperative and Implant-Related Parameters of Isolated Intertrochanteric Rotational Osteotomy for Pathological Femoral Torsion: A Descriptive Single-Center Report

BackgroundIsolated intertrochanteric rotational osteotomy (ITO) corrects pathological femoral torsion at the intertrochanteric level through a planar osteotomy stabilized with a fixed-angle plate.Functional results of joint-preserving femoral osteotomies appear regularly, yet the parameters that define how the operation is actually performed, including the rotational correction angle, the implant configuration, operative time, and length of hospital stay, are rarely quantified.This report documents these intraoperative and implantrelated parameters in a procedurally homogeneous single-technique cohort. MethodsPatients treated with isolated rotational or derotational ITO between 2002 and 2009 at one tertiary center were reviewed retrospectively.The descriptive variables fixed in advance were the intraoperative rotational correction angle, the implant configuration (plate angle, plate length, plate offset, and number of fixation screws), skin-to-skin operative time, and length of hospital stay.No inferential or outcome analysis was undertaken.Variables are summarized as mean ± standard deviation or as counts and percentages. ResultsSixty patients were analyzed (42 women, 18 men; mean age 28 ± 13 years).A rotational osteotomy was carried out in 43 patients (71.7%), and a derotational osteotomy in 17 (28.3%); the operated side was left in 28 (46.7%) and right in 32 (53.3%).The mean rotational correction angle was 18 ± 9°.Fixation used a fixedangle plate with a mean plate angle of 113 ± 11° and a mean length of 67 ± 10 mm, secured with a mean of 4 ± 1 screws.Plate offset was 10 mm in 35 patients (58.3%), absent in 16 (26.7%),5 mm in five patients (8.3%), and 15 mm in four patients (6.7%).The mean skin-to-skin operative time was 124 ± 27 minutes, and the mean length of hospital stay was 12 ± 2 days. ConclusionsThis report quantifies the intraoperative and implant-related profile of isolated ITO in a single-technique cohort.The intraoperative correction angle averaged 18° (median 15°), an intraoperatively set correction rather than one referenced to a measured preoperative torsion, with wide individual variation; fixation followed a single fixed-angle principle using blade and angle plates of comparable geometry.Because preoperative torsion was not quantified radiographically in this cohort, the correction angle is reported as an intraoperatively set surgical parameter.These figures are descriptive and document how the procedure was executed at one center during this period; they are not outcome, survivorship, or safety measures.