Objective To investigate the relationship between the incidence of deep vein thrombosis (DVT) during hospitalization and the energy of injury in tibial plateau fractures (TPFs).Methods 140 patients were enrolled in the study between September,2014,and October,2017 in Honghui Hospital,Xi'an Jiaotong University.According to the Schatzker classification,the low-energy group (Schatzker Ⅰ-Ⅲ) X-ray showed a simple or lateral fracture or compression fracture of the lateral plateau (n =63);the high-energy group (Schatzker Ⅳ-Ⅵ) X-ray showed the medial tibia or double of the tibial plateau (n =77).Duplex Ultrasonography was performed in lower extremities before and after surgical intervention for DVT evaluation and record the incidence of DVT,the days during hospitalization,the blood loss during surgery and the level of D-Dimer.All patients received mechanical and chemical thromboprophylaxis.The patient was followed up for one month after surgery,and the lower extremity ultrasound was reviewed and recorded.The measurement data were expressed as ((x) ± s),and the categorical variables were expressed in composition ratio.The measurement data were all in accordance with the normal distribution and the variance was uniform.The t-test was used,and the Chi-square test was used for comparison between groups.Results The incidence of thrombosis of tibial plateau fracture in TPFs was 36.43％ and 46.43％ pre-operation and post-operation respectively.The thrombosis incidence was 31.75 ％ (20/63) in the low-energy group and 40.26％ (31/77) in the high-energy group pre-operation.The thrombosis incidence was 44.44％ (28/63) in the low-energy group and 48.05％ (37/77) in the high-energy group post-operation.Statistical analysis showed no significant difference between the two groups pre-operation (P =0.298) and post-operation(P =0.785).The days during hospitalization [(11.94 ± 4.18) d,(9.56 ± 2.54) d],the blood loss during surgery [(208.96 ±224.43) ml,(129.68 ± 142.14) ml] and the level of D-Dimer [(2.39 ± 3.38) mg/L,(1.21 ± 2.32) mg/L] at pre-operation showed differences in the high energy group and the low energy group,respectively.Conclusions The incidence of DVT in TPFs is high during the hospital,but most of DVT is concentrated in the distal to the knee.Although the incidence of high energy injury and low energy injury DVT is not significantly different in TPFs,we should also be alert to the occurrence of DVT.

Objective To investigate the incidence of and risk factors for deep venous thrombosis (DVT) at the uninjured limb during hospitalization in patients with lower extremity fracture. Methods The clinical data were retrospectively analyzed of the 494 patients who had been hospitalized for lower extremity fracture at Department of Orthopedics, Honghui Hospital from September 1, 2014 to October 1, 2017. They were 228 males and 266 females with an average age of 58.9 ± 18.9 years ( from 16 to 94 years ) . 290 fractures occurred proximally to the knee, 101 fractures around the knee and 103 fractures distally to the knee. They received anticoagulant prophylaxis or treatment during hospitalization. After operation, they were examined with Doppler sonography for bilateral lower limbs to detect occurrence of thrombus. The incidence of DVT at the uninjured limb during hospitalization was recorded and its possible risk factors were analyzed statistically. The possible risk factors ( gender, age, fracture type, body mass index, concomitant internal disease, time from injury to surgery, time from surgery to discharge, American Society of Anesthesiologists rating, operation duration, blood loss, fluid infusion volume and D-dimer level ) were screened by single factor logistic regression analysis and the major independent risk factors were determined by multi-factor logistic re-gression analysis.Results DVT occurred at the injured limb during hospitalization in 237 cases ( 47.97%). Of them, 221 ( 44.74%) had peripheral thrombus, 7 central thrombus ( 1.42%) and 9 mixed thrombus ( 1.82%). DVT occurred at the uninjured limb during hospitalization in 98 cases ( 19.84%). Of them, 90 (18.2%) had peripheral thrombus, one central thrombus (0.2%) and 7 mixed thrombus (1.4%). Of the 98 patients with DVT at the uninjured limb, 74 (75.51%) had DVT at both lower limbs and 24 (24.49%) had DVT only at the uninjured limb. Age and D-dimer level one day after surgery were independent risk factors for DVT at the uninjured limb during hospitalization. Conclusions The incidence of actual DVT at the unin-jured limb in patients with lower extremity fracture cannot be ignored in spite of use of anticoagulants for pro-phylaxis or treatment during hospitalization. We should also be aware that age and D-dimer level one day after surgery are independent risk factors for DVT at the uninjured limb during hospitalization.

Objective To investigate the occurrence of deep venous thrombosis (DVT) in the perioperative period of patients with fracture distal to the knee,so that clinicians have a better understanding of the occurrence of DVT in the perioperative period of the fracture distal to the knee.Methods A retrospective analysis of the clinical data of 365 patients with distal knee fractures who underwent surgery in the Department of Orthopaedics Trauma,Xi'an Jiaotong University Medical College Red Cross Hospital from June 2014 to March 2018 was conducted.There were 213 males and 152 females,aged (45.05 ± 15.24) years,with an age range of 17-83 years.Classification of fracture sites:177 cases of tibiofibular shaft fracture,130 cases of ankle fracture,and 58 cases of foot fracture.According to whether thrombosis occurred or not,the patients were divided into thrombotic group and non-thrombotic group before and after operation.There were 66 patients with thrombosis before operation,299 patients without thrombosis before operation,88 patients with thrombosis after operation,and 277 patients without thrombosis after operation.The incidence of thrombosis and the location of the thrombus were recorded.The sex,age,fracture site,ASA score,operation time,the time from injury to admission,the time from injury to surgery,intraoperative tourniquet time,intraoperative blood transfusion volume,intraoperative blood loss,intraoperative transfusion volume,hemoglobin volume at admission and 1 day after operation,D-dimer level at admission and 1 day after operation,multiple injuries,chronic hepatitis and medical diseases were analyzed.The measuremernt data of normal distribution and homogeneity of variance were expressed as mean ± standard deviation (Mean ± SD),the t test was used for comparison between two groups.The comparison of count data was performed by x2 test or Fisher exact probability method,and multivariate logistic regression analysis was performed on the risk factors affecting the occurrence of DVT in both lower extremities.Results The preoperative DVT rate was 18.1％ (66/365).In patients with thrombosis,distal thrombosis accounted for 93.94％ (62/66),and mixed thrombosis accounted for 6.06％ (4/66).The incidence of postoperative DVT was 24.1％ (88/365).In patients with thrombosis,distal thrombosis accounted for 94.32％ (83/88),proximal thrombosis accounted for 1.14％ (1/88),and mixed thrombus accounted for 4.55％ (4/88).Fracture site,ASA score,operation time,intraoperative tourniquet time,intraoperative blood transfusion volume,intraoperative blood loss,intraoperative transfusion volume were not statistically significant(P ＞0.05).Age ≥ 40 years (OR =2.691,95％ CI:1.422-5.093,P =0.002),the time from injury to admission ＞ 3 days (OR =1.927,95 ％ CI:1.072-3.463,P =0.028)were independent risk factors for DVT formation in fracture distal to the knee before operation.Age ≥ 40 years (OR =3.925,95 ％ CI:2.161-7.129,P =0.000),the time from injury to surgery ＞ 5 days (OR =1.835,95 ％ CI:1.080-3.119,P =0.025),D-dimer level at 1 day after operation (OR =1.191,95％ CI:1.096-1.293,P =0.000),combined with multiple injuries (OR =1.981,95％ CI:1.006-3.902,P =0.048),combined with coronary atherosclerotic heart disease (OR =2.692,95％ CI:1.112-6.517,P =0.028) were independent risk factor for DVT formation after operation for fracture distal to the knee.Conclusions The occurrence of DVT before and after the fracture of the knee is mainly caused by distal thrombosis,and proximal thrombosis also occurs.Those patients aged≥40 years,combined with multiple injuries and coronary heart disease,should focus on preventing the occurrence of DVT.After the injury,the patient is immediately admitted to the hospital for DVT screening,and when the general condition allowed,shortening the preoperative waiting time can reduce the occurrence of DVT.

Objective To investigate the incidence and risk factors of deep venous thrombosis (DVT) of lower extremity in patients with pelvic or acetabular fracture.Methods From August 2015 to December 2016,110 patients with pelvic or acetabular fracture were treated in our hospital.They were 76 males and 34 females with a mean age of 44.2 years (range,from 16 to 76 years).There were 48 pelvic fractures,including 12 anterior and posterior compression,16 lateral compression and 20 vertical shear ones by the Young-Burgess classification;there were 62 acetabular fractures,including 26 simple and 36 complex ones by the Letournel-Judet classification.The incidence of lower extremity DVT was detected preoperatively and postoperatively using ultrasound detection.The factors associated with the incidence of DVT were analyzed statistically.The risk factors were screened by single factor logistic regression analysis;the major independe risk factors were determined by multi-factor logistic regression analysis.P ＜ 0.05 was considered as statistically significant.Results DVT occurred in 32 patients (29.09％),including 21 cases (19.09％) of proximal thrombosis and 3 cases of combined pulmonary embolism.The incidence of DVT in patients with acetabular fracture was significantly higher than in those with pelvic fracture (P ＜ 0.05);the incidence of proximal DVT in patients with complex acetabular fracture was significantly higher than in those with simple acetabular fracture (P ＜ 0.05).Multivariate analysis showed that age of ＞ 60 years,combined injuries and interval of ＞ 2 weeks from injury to surgery were independent risk factors for incidence of DVT (P ＜ 0.05).Conclusions The risk of lower extremity DVT is high in patients with pelvic or acetabular fracture in spite of active prophylaxis,especially the risk of proximal thrombosis.Age of ＞ 60 years,combined injuries and interval of ＞ 2 weeks from injury to surgery may be the independent risk factors for incidence of DVT.

Objective To investigate the incidence and risk factors of deep venous thrombosis (DVT) in lower extremity in patients with tibial plateau fracture.Methods The data from 148 patients with tibial plateau fracture were retrospectively analyzed who had been admitted to the Department of Orthopaedic Trauma,Honghui Hospital between September 2014 and December 2017.They were 90 males and 58 females,aged from 19 to 83 years (average,47.2 ± 13.1 years).According to the Schatzker classification of tibial plateau fractures,24 cases belonged to type Ⅰ,17 to type Ⅱ,25 to type Ⅲ,29 to type Ⅳ,34 to type Ⅴ,and 19 to type Ⅵ.The incidence of DVT was detected by venous ultrasound of bilateral lower extremities before and after surgery.The factors related to the occurrence of DVT were statistically analyzed.Univariate analysis was used to determine risk factors,and multivariate logistic regression analysis was used to identify the primary independent risk factors.Results The preoperative DVT incidence was 43.92％ (65/148) and the postoperative DVT incidence 52.70％ (78/148).Distal thrombus predominated both preoperatively and postoperatively.Age (OR =1.043,95％ CI 1.015 ～ 1.072,P =0.002) and D-dimer level upon admission (OR =1.219,95％ CI 1.009 ～ 1.473,P =0.040) were independent risk factors for preoperative DVT formation;age (OR =1.075,95％ CI 1.042 ～ 1.110,P =0.000),operative time (OR =0.994,95％ CI 0.989～0.999,P=0.016),D-dimer level at 1 day postoperatively (OR=1.135,95％ CI 1.025～1.258,P =0.015) and at 3 days postoperatively (OR =1.366,95％ CI 1.008 ～ 1.853,P =0.044) were independent risk factors for postoperative DVT.Conclusions The incidence of DVT in the lower extremity may be high in patients with tibial plateau fracture.Distal thrombus is the main manifestation.In fracture patients,especially the middle-aged and elderly ones,dynamic monitoring of D-dimer level should be combined with lower extremity venous ultrasound for early diagnosis of DVT.In patients with lower extremity DVT,surgical progress should be accelerated on the basis of good surgical quality to reduce the incidence of postoperative lower extremity DVT.

Objective:To investigate the incidence of pre- and post-operative lower extremity deep venous thrombosis (DVT) in hospitalized patients with intertrochanteric fractures and to analyze the relevant risk factors.Methods:A retrospective case-control study was conducted to analyze the data of 218 patients with femoral intertrochanteric fractures admitted to Xi'an Honghui Hospital, Xi'an Jiaotong University from July 2015 to October 2017, including 85 males and 133 females. There were 85 males and 133 females, aged 32-102 years [(76.0±11.9)years]. Of the patients, 213 had open reduction and internal fixation, 4 partial hip arthroplasty, and 1 external fixation. All patients underwent deep venous ultrasound of the lower extremities before and after surgery to determine the occurrence of DVT. DVT of the lower extremities was divided into distal thrombosis, proximal thrombosis and mixed thrombosis. According to the preoperative and postoperative ultrasonography results, the patients were divided into thrombosis group [82 patients (37.6%) before operation, 128 patients (58.7%) after operation] and non-thrombosis group [136 patients (62.4%) before operation, 90 patients (41.3%) after operation]. Location of DVT were recorded before and after operation and outcome was evaluated. All patients were assessed for risk factors associated with thrombosis, including general patient data, time of surgery, tourniquet time, blood transfusion, blood loss, fluid volume, drainage, and serological markers. Multivariate Logistic regression analysis was used for detecting the risk factors.Results:The DVT rate was 37.6% preoperatively and increased to 58.7% postoperatively. The type of thrombosis was mainly distal DVT, which accounted for 86.6% and 90.6% of DVT before and after surgery, respectively. After the operation, 2.8% of the distal DVT extended above the popliteal vein. A total of 23.4% of the patients had no thrombosis before surgery, and distal, proximal, or mixed DVT occurred after surgery (22.0%, 0.5% and 0.9%, respectively). No fatal pulmonary embolism occurred. The univariate analysis showed no statistical differences between the preoperative thrombosis group and non-thrombosis group in terms of age, gender, fracture side, combined diseases, body mass index, American Society of Anesthesiologists (ASA) classification, admission D-dimer, and admission C-reactive protein (CRP) ( P>0.05), but the time from fracture to hospitalization and the time from fracture to surgery were significantly different between the two groups ( P<0.05). There were no statistical differences between the postoperative thrombosis group and the postoperative non-thrombosis group in age, gender, fracture side, combined diseases, body mass index, length of stay, ASA classification, surgical method, operation time, blood transfusion, blood loss, infusion volume, drainage volume, D-dimer on admission, and CRP on admission ( P>0.05), but the time from fracture to admission, time from fracture to surgery, D-dimer before surgery, D-dimer at day 1 after surgery, D-dimer at day 5 after surgery, and CRP at day 5 after surgery showed significant differences between the two groups ( P<0.05). Multivariate analysis results showed the time from fracture to hospitalization ( OR=1.109, 95% CI 1.003-1.225, P<0.05) and the time from fracture to surgery ( OR=1.090, 95% CI 1.007-1.180, P<0.05) were independent risk factors for preoperative DVT. The time from fracture to hospital ( OR=1.137, 95% CI 1.002-1.290, P<0.05) and 1 day postoperative D-dimer ( OR=1.087, 95% CI 1.033-1.142, P<0.05) were independent risk factors for postoperative DVT. Conclusions:For intertrochanteric fractures, distal DVT is the main type of thrombosis. Time from fracture to hospitalization is an independent risk factor of DVT before and after operation, and time from fracture to operation is an independent risk factor of DVT before operation. Early intervention (early admission and early surgery) may reduce the incidence of DVT.