Abstract: Objective To explore and analysis the effects of dynamic hip and anti rotation intramedullary nail fixation on hip joint function in elderly patients with intertrochanteric fractures of the femur. Methods From August 2019 to December 2022, 97 cases of elderly patients with intertrochanteric fractures of the femur who underwent treatment at Hancheng Jiaoda Hospital were selected as the research subjects. Accorded to the random number table method, the 97 patients were divided into the intramedullary nail group of 49 cases and the control group of 48 cases. The control group were received dynamic hip screw internal fixation surgery, while the intramedullary nail group were received anti rotation intramedullary nail fixation internal fixation surgery.The recovery of hip joint function in both groups was recorded and observed. Results All patients were successfully completed the surgery, and the time of postoperative callus appearance, postoperative fracture healing time, postoperative hospitalization time, surgical time, intraoperative bleeding volume,and first postoperative movement time in the intramedullary nail group were significantly shorter than those in the control group (P<0.05). The incidence of complications such as hip varus, infection, prosthesis loosening, venous thrombosis, and limb shortening 6 months after surgery in the intramedullary nail group was 6.12%, compared to 22.92% in the control group. The incidence of complications in the intramedullary nail group were significantly lower than that in the control group (P<0.05). The Harris score at 6 months after surgery in both groups was significantly higher than that on the 1st day before surgery (P<0.05), and the Harris score at 6 months after surgery in the intramedullary nail group was also significantly higher than that in the control group (P<0.05). The excellent and good rate of hip joint function in the intramedullary nail group at 6 months after surgery was 97.96%, which was significantly improved compared to 83.33% in the control group (P<0.05). Conclusion The treatment of elderly intertrochanteric fractures with proximal femoral interlocking intramedullary nails can promote patient recovery, reduce trauma to patients, reduce the incidence of postoperative complications, and improve the Harris score of hip joint function, thereby improving the overall prognosis and efficacy of patients.

Key words: proximal femur, intertrochanteric fracture, complications, hip function, Harris grade