Abstract:Objective To study the temporal pattern of deep venous thrombosis of the lower limb in patients with perioperative hip fractures,and to provide the basis for the prevention of clinical thrombosis.Methods From June 2013 to June 2016,398 cases of femoral fractures (178 cases of femoral neck fractures and 220 cases of intertrochanteric fractures) were divided into anticoagulant group and non-anticoagulation group according to the different anticoagulation time.The patients with hip fractures treated by traumatic orthopedic surgery in Chengde Medical College Hospital All patients were treated with lower extremity venous Doppler ultrasonography on the 1st,3rd,5th day after injury,more than 5 days after injury and on the 2nd,5th,7th and 14th day after operation.The time of thrombosis and the different groups Number of thrombosis cases.The number of new cases of thrombosis and the incidence rate were analyzed statistically at different time points.The frequency distribution curve was used to analyze the peak time of perioperative thrombosis.Results 398 cases were taken in the study.The LMWH prophylaxis thrombosis before operation group were 226 cases,24 cases were diagnosed as deep vein thrombosis(DVT),and the incidence was 10.61%.The non-LMWH prophylaxis thrombosis before operation group had 172 cases,and 37 cases were diagnosed deep vein thrombosis (DVT),and the incidence was 21.5%.The difference between two group was significant.The numbers of the LMWH prophylaxis thrombosis before operation group of the DVT at the first day after trauma,the third day,the fifth day and more than the fifth day after trauma.,the second day,the fifth day,the seventh day,the fourteenth day post-operative were 2(0.88%)、6(2.65%)、3(1.33%)、2(0.88%)、9(3.98%)、2(0.88%)、0(0%)、0(0%) respectively.The numbers of the non-LMWH prophylaxis thrombosis before operation group of the DVT at the first day after trauma,the third day,the fifth day and more than the fifth day after trauma,the second day,the fifth day,the seventh day,the fourteenth day post-operative were were3(1.74%)、9(5.23%)、3(1.74%)、4(2.33%)、11(6.40%)、4(2.33%)、1(0.58%)、2(1.16%)respectively,the incidence of DVT at the first three day after injury and the first day after operation were hightest.Conclusion In hip fractures patients,thrombosis occurred within 3 days after injury and one day after surgery.Timely application of drug prevention can reduce the perioperative fractures of patients with perioperative lower extremity venous thrombosis rate.
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