[Factors associated with mediate complications in postoperative patients with transtrochanteric fractures with 135° dynamic hip screw system].

INTRODUCTION

Transtrochanteric fractures represent 50% of proximal femur fractures, with a higher incidence in patients older than 65 years. The objective of the study is to evaluate the association of orthopedic factors with the presence of mediate complications in post-operative geriatric patients for transtrochanteric fractures with the 135o dynamic hip screw (DHS) system.

MATERIAL AND

METHODS

Retrospective, analytical study. We evaluated patients older than 65 years with transtrochanteric fractures treated with 135o DHS. We analyzed pre-surgical, post-surgical, and 3 and 6-month radiographs. We performed a descriptive analysis of the population characteristics, comparison analysis of means (Mann-Whitney U) and proportions (chi square), correlation analysis, and a logistic regression model to determine the degree of association of the factors with mediate complications.

RESULTS

We evaluated 92 patients with a mean age of 83 ± 6.7 years. We evidenced mediate orthopedic complications in 8.7%; considering as the most frequent the cut-out (5.4%). In the correlation analysis, the peak apex index > 25 has a weak correlation (r = 0.372), the peak apex index modified to calcar > 27 moderate correlation (r = 0.528). The lateral cervico-diaphyseal angle > 20° has a high correlation (r = 0.7). In the regression analysis, the latter was associated with the presence of mediate orthopedic complications (OR 4.93, CI 1.2-15.81, p = 0.000).

CONCLUSIONS

A correlation was observed between factors such as tip apex index > 25, tip apex index modified to calcar > 27 and cervical-lateral diaphyseal angle > 20o with the presence of complications, highlighting the latter as the factor that presents association with statistically significant differences.