Abstract: Objective To investigate the risk factors of latent blood loss after internal fixation of intertrochanteric fracture of femur.Methods The clinical data of 112 patients with intertrochanteric fracture of femur treated with internal fixation in our hospital from May 2019 to July 2022 were retrospectively analyzed,and the hidden blood loss after surgery was recorded.SPSS software was used to analyze the influencing factors of hidden blood loss after internal fixation of intertrochanteric fracture of femur.Results None of the 152 patients with intertrochanteric fracture of femur had serious complications or died during perioperative period,and the wound was not infected.The fixation alignment was good.The postoperative dominant blood loss was (236.37±71.52) ml,the recessive blood loss was (709.74±132.36) ml,and the total blood loss was (946.11±205.61) ml.The recessive blood loss was significantly higher than the dominant blood loss (P<0.05).Multiple linear regression analysis showed that age,hypertension,diabetes,fracture type,preoperative anticoagulation,time from injury to operation,and operation time were all risk factors for latent blood loss after internal fixation of intertrochanteric fracture of femur (P<0.05).Conclusion Age,hypertension,diabetes,fracture type,preoperative anticoagulation,time from injury to operation and operation time are all risk factors for latent blood loss after internal fixation of intertrochanteric fracture of femur.According to these factors,medical staff can formulate corresponding prevention and treatment programs to reduce the latent blood loss after internal fixation of intertrochanteric fracture of femur.

Key words: intertrochanteric fracture of femur;intramedullary nail fixation at proximal femur;occult blood loss;risk factors