Relationship Between Timing Of Surgery And Perioperative Lower Extremity Deep Vein Thrombosis In PFNA For Geriatric Intertrochanteric Femur Fractures

objective The relationship between the timing of surgery and perioperative deep venous thrombosis(DVT)of the lower extremity in elderly femoral intertrochanteric fractures treated with proximal femoral nail antirotation(PFNA)was investigated,to understand thrombosis at different times during the perioperative period and whether there is a difference in the chance of thrombosis after surgical treatment at different times.Methods Fifty-seven elderly patients with intertrochanteric femoral fractures treated with PFNA surgery in the First People’s Hospital of Yibin from September 2020 to May 2021 were selected.Because of various objective factors,the time period between the patient’s fracture and the surgical treatment was different,thus dividing the group into three groups:Group A(within 3 days),Group B(within 3-7 days)and Group C(after 7 days).There were 12 cases in Group A,21 cases in Group B and 24 cases in Group C.The differences in lower limb deep vein thrombosis in the three groups were compared.Results There was one case of perioperative DVT in group A,two cases in group B and nine cases in group C;the prolonged time between injury and surgery had a statistically significant effect on the formation of DVT(P<0.05);there was a significant difference in the odds of lower limb DVT in groups A,B and C(P<0.05);In group C,there were 6 cases of preoperative DVT and 3 cases of postoperative DVT.Conclusion In elderly patients with intertrochanteric fractures,the risk of deep vein thrombosis increases as the time period between fracture and surgery lengthens,with the risk of thrombosis increasing significantly after 7 days;early surgery may reduce deep vein thrombosis if the patient has no absolute contraindications to surgery.