| Objective To retrospectively study the patients with femoral head necrosis after internal fixation of femoral neck fracture, so as to identify the potential risk factors.Methods Patients with femoral neck fracture in Renmin Hospital of Wuhan University from January 2014 to December 2019 were retrospectively analyzed. The main data recorded included gender, age, BMI, ASA classification, fracture line location, Garden classification, reduction quality, interval between injury and operation, and whether preoperative traction was performed. The prognosis after fracture surgery was judged according to the follow-up imaging data of patients. Internal fixation was performed with cannulated compression screws. Univariate chi-square test and Logistic regression were used to analyze the association between postoperative femoral head necrosis and the above factors.Results A total of 246 cases were collected. Postoperative femoral head necrosis occurred in 46 cases (18.7%, 46/246). The gender, age, BMI, ASA classification, fracture line location, Garden classification, reduction quality, interval between injury and operation, and whether preoperative traction were included in the single factor chi-square test. The statistically significant results of the single factor chi-square test were put into the Logistic regression equation. The results showed that postoperative femoral head necrosis was mainly related to Garden classification, fracture line location, fracture reduction quality, preoperative traction and other factors (P<0.05), and there was no significant trend in other factors.Conclusion The incidence of femoral head necrosis after femoral neck fracture reduction and internal fixation is affected by many factors. Garden classification, fracture line location, fracture reduction quality, preoperative traction and other factors may increase the risk of femoral head necrosis in patients with femoral neck fracture. |
