Background. Orthopaedic surgeons are increasingly pressured to consider thromboprophylaxis for patients when little evidence exists. The aim of this study was to determine the incidence of fatal pulmonary embolism following office attendance in our outpatient fracture clinic. Methods. Between October 2004 and September 2006 details of all new patients referred to our orthopaedic fracture clinic were prospectively entered into an audit database. Patients did not receive any form of thromboprophylaxis. Data was cross referenced with a national mortality database to identify all patients who subsequently died within 90 days of attendance in fracture clinic. Results. 11,502 new patient fracture clinic appointments occurred during the study period. 5604 patients had lower limb injuries. Twenty three patients died within 90 days of being seen. The mean age of these patients was 75 years (range 52–100). Two of the 23 patients attended fracture clinic with lower limb injuries. Review of the medical records showed no evidence of pulmonary embolism. Assuming a worst case scenario that both died of fatal pulmonary embolism the incidence of fatal pulmonary embolism following attendance in fracture clinic with a lower limb injury is no higher than 0.036% (95% CI 0.09%–0.33%). Conclusion. The incidence of fatal PE following outpatient management of lower limb fractures is very low. This incidence data will inform decisions on the risk-benefit analyisis of thromboprophylaxis in this group of patients

Introduction. Total knee arthroplasty (TKA) is one of the most successful surgeries to relieve pain and dysfunction caused by severe arthritis. However, it is a still big problem that there is a possibility of death in pulmonary embolism (PE) after TKA. We previously reported that there was more incidence of asymptomatic PE than estimated in general by detail examinations. But it was difficult to whom we decided to perform additional examinations except the patients with some doubtful symptoms. Therefore, we investigated detail of PE patients after primary TKA to find out anything key point in PE. Methods. Consecutive ninety-nine patients who underwent primary TKA from January 2015 to March 2018 were applied. There were 23 male and 76 females included, and the mean age was 73.7 years old. There were 96 cases of osteoarthritis, 2 cases of osteonecrosis and one of rheumatoid arthritis. A single knee surgery team performed all operations with cemented type prostheses and air tourniquet during operation. There were 35 cases of one-staged bilateral TKA and 64 of unilateral TKA. Detail examinations with contrast enhanced CT (CE-CT) and venous ultrasonography (US) were performed at the 3rd day after surgery. Next, we applied ultra sound cardiogram (UCG) to the patients diagnosed as PE by CE-CT, we checked right ventricular overload (RVO) to treat PE. These images were read by a single senior radiologist team. Results. CE-CT was performed in 87 patients (87.8%) and US was in all patients. The incidence of deep vein thrombosis (DVT) was 67 patients (67.6%), and all of these was distal type DVT. PE was 17 patients (17.1%), and each of patients had no symptoms. RVO was detected in 5 patients (5.0%), and two of them (2.0%) had decreased SpO2 in early 90% perioperative period. All patients did not change rehabilitation protocol and progress was good until discharge. Conclusion. We investigated consecutive 99 patients for DVT/PE after primary TKA using CE-CT and venous US. And we performed UCG to PE patients. One of the important findings to decide detail examination for asymptomatic PE was decrease in SpO2 during early perioperative period. It might be the only finding except symptom. We also have to be more aware about high incidence of asymptomatic PE and more careful to the patients after TKA to prevent complications. For any figures or tables, please contact authors directly

Introduction. Peak incidence of pulmonary embolism (PE) typically occurs weeks after total hip (THA) or knee (TKA) arthroplasty, long after hospital discharge. We investigated risk factors for acute PE occurring during index hospitalisation. Methods. Retrospective review of an IRB-approved database identified 329 arthroplasties performed by a single surgeon between 2002 and 2007 at two University teaching hospitals. Warfarin (goal INR 2.0) was standard venous thromboembolism prophylaxis. Results. There were 126 (38.6%) primary THA, 86 (26.1%) primary TKA and 117 (35.3%) revision arthroplasties. Seven patients (7/329; 2.1%) experienced clinically evident non-fatal pulmonary embolism, including 5 after TKA (5/128; 3.9%) and 2 after THA (2/194; 1.0%). In-hospital PE occurred in 4 (1.2%) patients (3 TKA, 1 THA) at a mean 2.7 days (range 2-4 days) after operation, compared with 3 symptomatic events (2 TKA, 1 THA) occurring after discharge (mean 19.3 days; range 8-27 days). Three of four patients suffering acute in-hospital PE were on pre-operative warfarin for chronic atrial fibrillation. Among all patients on pre-operative warfarin, 3 (12.5%) sustained an early PE, with a relative risk of 38.1 times that of controls not on chronic warfarin therapy (p=0.001). Body mass index greater than 30 kg/m2, a history of previous venous thromboembolism, coronary artery disease, ASA score, and type of operation were all found to not be associated with increased risk of in-hospital PE. Conclusion. Acute symptomatic in-hospital pulmonary embolism was correlated with chronic pre-operative warfarin anticoagulation. Compared to historical controls, time to PE was shorter in patients on chronic warfarin. Rebound hypercoagulability after discontinuation of chronic warfarin in preparation for total joint arthroplasty represents a greater hazard than excessive bleeding; we advocate bridging anticoagulation with LMWH in these patients

Introduction:. Although the risk of pulmonary embolism (PE) or other embolic events associated with total joint arthroplasty have been recorded for some time, to date no direct means of these events in human arthroplasty have reported. This prospective study was designed to clarify the pathophysiologic mechanism of PE after total knee arthroplasty (TKA). Methods:. Nine patients fulfilling the following selection criteria were included in this prospective study: diagnosis of osteoarthosis, age 60 to 75 years, cemented primary TKA. All patients had a baseline pulmonary perfusion scan 2 days prior to the surgery. TKA was performed in the standard manner under general anesthesia. Monitoring of the heart chambers during the course of the TKA was performed using a 5 MHz ultrasonic transducer placed into the esophagus. The 4-chamber view plane of the heart was then imaged using a 2-dimensional echocardiography. A tip of the catheter inserted from the contralateral femoral vein was also placed in the inferior vena cava to harvest the venous blood flowed from the suffered lower extremity before and after tourniquet release. All patients had pulmonary perfusion scans 3 hours after TKA and on the 21st postoperative day. The ventilation-perfusion scan was compared with the baseline perfusion scan. Results:. No symptomatic PE were identified. Using transesophageal echocardiographic monitoring, the heaviest flow of embolic particles in the right heart was observed 2 seconds after tourniquet release and lasted approximately 30 seconds. By squeezing the calf muscle, the heavy flow of embolic particles was again observed. The venous blood harvested through the catheter after tourniquet release had fat droplets and white coagula. All of patients had pulmonary perfusion defects 3 hours after TKA, but no pulmonary perfusion defects on the 21st postoperative day. Discussion and Conclusions:. Substantial amounts of embolic materials were seen in the right heart using transesophageal echocardiography in patients operated in the standard manner. It was demonstrated that these embolic materials consisted of fat droplets and white coagula. We also demonstrated that many embolic materials for PE and/or DVT originated in the calf. All of patients had pulmonary perfusion defects just after TKA. It was concluded that all of the patients who underwent TKA had asymptomatic PE just after the surgery. Therefore, all of the patients have a possibility of symptomatic PE just after TKA

Purpose. With the advent of newer diagnostic imaging tools, the reported prevalence of acute pulmonary embolism (PE) following total hip (THA) and total knee (TKA) arthroplasty appears to be increasing. However, the true prevalence and clinical relevance of these events are unclear. Our study was designed to evaluate the results of routine multi-detector computed tomography (MDCT) in this patient population in the early postoperative period. Method. We prospectively performed MDCT scans on 48 consecutive THA/TKA patients on the first postoperative day in 2009. Patients underwent routine postoperative care and data were collected regarding the development of symptoms such as tachycardia, fever, chest pain, or shortness of breath. Scans were kept blinded and read at the end of study recruitment for the diagnosis of acute PE. Results. Our cohort included 27 TKA patients and 21 THA patients. None of the 48 patients had any symptoms of PE. Among the TKR patients, 11 (41%) of the CT scans were read as positive for acute PE compared with 1 (5%) of the THR patients (p=0.004). All of the patients diagnosed with asymptomatic PE were discharged from hospital without treatment for venous thromboembolism (VTE) and without developing any clinical symptoms suggestive of VTE. One TKA patient, who had a negative CT scan on the first postoperative day, was diagnosed with symptomatic PE the following day. Conclusion. Our study demonstrates a high rate of abnormal MDCT early following lower extremity arthroplasty, the clinical significance of which may be benign. This finding is also important in the interpretation of MDCT obtained after a clinical suspicion of PE in these patients

Background. Post-operative deep venous thrombosis (DVT) and subsequent pulmonary embolism (PE) remain a serious complication after total joint replacement. Although with modern chemical and mechanical prophylaxis and rapid rehabilitation the rate of symptomatic DVT and PE has reduced, isolation of pre-operative DVT, specially in patients with prior history of DVT remains a challenge. The aim of this study was to assess the use of pre-operative dopplers as a tool to detect and identify prior DVT in patients undergoing total joint replacement. Methods. Between January 2014 and December 2014, 211 elective primary and revision hip and knee arthroplasty were identified from our prospective institutional database. All cases were performed by two adult reconstruction specialists. All primary total hip arthroplasties (THA) were non-cemented and all primary total knee arthroplasties (TKA) were cemented with similar implant and technique. Prior to July 2014, only patients with prior history of DVT or PE underwent pre-operative dopplers. From July 2014, all cases underwent routine pre-operative doppler screening. All patients with clinical symptoms of calf pain underwent post-operative dopplers. Patients were followed for a minimum of 3 month post-operatively. All emergency room (ER) visits for role out DVT were identified. No patient was lost to follow. Results. 115 patients patient underwent pre-operative dopplers. Three patients had a history of prior popliteal DVT, none of which had post-operative DVT or PE. In the remaining 112 patients, none of the pre-operative dopplers were positive for DVT. 34 patients in this group (29%) underwent post-operative dopplers, either during the hospital stay or in the ER within 3 month after index surgery. Only one patient developed symptomatic PE (0.8%) after total knee arthroplasty. 96 patients did not have pre-operative dopplers, 3 of which (3%) had symptomatic DVT and PE during hospital stay, all after total knee arthroplasty. There was no statistical difference for rate of symptomatic DVT/PE between the two groups (p=0.3). There was no correlation between DVT and obesity, age, or revision versus primary cases. Discussion and Conclusions. Routine pre-operative dopplers do not significantly lower rate of symptomatic DVT/PE and are not helpful in early detection and prevention in asymptomatic patients prior to routine total joint replacement

Aim. To assess the incidence of fatal pulmonary embolism (PE) following elective total knee replacement (TKR) with a standardised multi-modal prophylaxis regime in a large teaching DGH over a 10 year period. Material and methods. Information was gathered from a prospective audit database, utilising clinical coding for TKR and those that had died within 42 and 90 days. The 10 years from April 2000 were analysed to establish both 42 and 90 day mortality rates. A multi-modal prophylaxis regime for all patients included regional anaesthesia (when possible), mechanical prophylaxis (Flo-tron calf garment per-operatively, AV impulse boots until mobile and anti-embolism stockings for 6 weeks), mobilisation within 24 hours and 75mg aspirin for 4 weeks. A case note review was performed to ascertain the causes of death. Where a patient had been referred to the coroner, the coroner's office was contacted for PM results. Results. There were 6,584 cases; the mortality rates at 42 and 90 days were 0.36 and 0.52%. There were no fatal PE's within 42 days of surgery. 2 fatal PE's occurred subsequently at 48 and 57 days (0.03%) The leading causes of death were myocardial infarction and cerebro-vascular accident. Conclusion. Fatal pulmonary embolus following elective TKR with a multi-modal prophylaxis regime is not a significant cause of mortality

Background. Post-operative deep venous thrombosis (DVT) and subsequent pulmonary embolism (PE) remain a serious complication after total joint replacement. Although with modern chemical and mechanical prophylaxis and rapid rehabilitation the rate of symptomatic DVT and PE has reduced, isolation of pre-operative DVT, especially in patients with prior history of DVT remains a challenge. The aim of this study was to assess the utility of pre-operative dopplers as a tool to screen and reduce DVT/PE rate in patients undergoing total joint replacement. Methods. Between January 2014 and December 2014, 211 elective primary hip and knee arthroplasty were identified from our prospective institutional database as two consecutive cohorts (115 cases had pre-operative dopplers and 96 did not). All cases were performed by two adult reconstruction specialists. All primary total hip arthroplasties (THA) were non-cemented and all primary total knee arthroplasties (TKA) were cemented with similar implant and technique. In the first cohort, all cases underwent routine pre-operative doppler screening and in the control cohort, only patients with prior history of DVT or PE underwent pre-operative dopplers. All patients with clinical symptoms of calf pain underwent post-operative dopplers. Patients were followed for a minimum of 3 month post-operatively. All emergency room (ER) visits for role out DVT were identified. No patient was lost to follow. Results. In the cohort with pre-operative dopplers, none of the pre-operative dopplers were positive for DVT, including three patients that had a history of prior DVT. 34 patients in this group (29%) underwent post-operative dopplers, either during the hospital stay or in the ER within 3 month after index surgery. Only one patient (no prior history of DVT) developed symptomatic DVT/PE (0.8%) after total knee arthroplasty. In the control cohort, 3 of which (3%) had symptomatic DVT, one of which had PE (1%) during hospital stay, all after total knee arthroplasty. There was no statistical difference for rate of symptomatic DVT/PE between the two groups (p=0.3). There was no correlation between DVT and age, gender or BMI. Discussion and Conclusions. Utilization of routine pre-operative dopplers for all patients did not lower the rate of symptomatic DVT/PE and are not helpful in early detection and prevention in asymptomatic patients prior to routine total joint replacement. Pre-operative dopplers should be used in selected patients with high risk of DVT

There is widespread appreciation amongst orthopaedic surgeons of the importance of thromboprophylaxis. However much of the evidence is based on surrogate outcomes of clinical end-points. This population-based study aims to identify the incidence and trends in venous thromboembolic disease (VTE) following total hip (THR) and knee arthroplasty (TKR) with death or readmission for VTE up to two years following surgery for all patients in Scotland as the primary outcome. We used the Scottish Morbidity Record (SMR01) system to identify all patients undergoing hip or knee arthroplasty over the ten-year period from 1992 to 2001. Patients undergoing cataract surgery over the same period were identified as a control group. Record linkage for all patients to subsequent SMR01 and Registrar General records provided details of further admissions due to DVT or non-fatal PE and deaths within Scotland up to two years after the operation. The cause of death was determined from the Registrar General Records. The incidence of VTE (including fatal pulmonary embolism (PE)) three months following primary THR was 2.27% and primary TKR was 1.79%. The incidence of fatal PE within three months of THR was 0.22% and TKR was 0.15%. The majority of events occurred in the interval from hospital discharge to six weeks after surgery. There was no apparent trend over the period. An apparent reduction in the overall mortality within 365 days of surgery appears to be due to a reduction in the incidence of acute myocardial infarct. The data support the current advice that prophylaxis should be continued for at least six weeks following surgery. Despite increased uptake of prophylaxis regimens and earlier mobilisation, there has been no apparent change in the incidence of symptomatic VTE over the ten-years from 1992 to 2001

Over a 13-year period we studied all patients who underwent major hip and knee surgery and were diagnosed with objectively confirmed symptomatic venous thromboembolism, either deep venous thrombosis or non-fatal pulmonary embolism, within six months after surgery. Low-molecular-weight heparin had been given while the patients were in hospital. There were 5607 patients. The cumulative incidence of symptomatic venous thromboembolism was 2.7% (150 of 5607), of which 1.1% had developed pulmonary embolism, 1.5% had deep venous thrombosis and 0.6% had both. Patients presented with deep venous thrombosis at a median of 24 days and pulmonary embolism at 17 days after surgery for hip fracture. After total hip replacement, deep venous thrombosis and pulmonary embolism occurred at a median of 21 and 34 days respectively. After total knee replacement, the median time to the presentation of deep venous thrombosis and pulmonary embolism was 20 and 12 days respectively. The cumulative risk of venous thromboembolism lasted for up to three months after hip surgery and for one month after total knee replacement. Venous thromboembolism was diagnosed after discharge from hospital in 70% of patients who developed this complication. Despite hospital-based thromboprophylaxis, most cases of clinical venous thromboembolism occur after discharge and at different times according to the operation performed

The selection of a prophylaxis agent is a balance between efficacy and safety. Total knee arthroplasty patients receive DVT prophylaxis because orthopaedic surgeons are concerned about the morbidity and mortality associated with pulmonary embolism. However, at the same time there is great concern about excessive bleeding. The goal is to provide the appropriate anticoagulation to prevent symptomatic pulmonary embolism (PE) and DVT but at the same time avoid over anticoagulation which can be associated with bleeding and other wound problems. Therefore, risk stratification is necessary. Although risk stratification is the ideal way to determine the appropriate prophylaxis agent to use for a specific patient, there is no validated risk stratification strategy available today. There is general agreement at this time that patients who have had a prior PE or symptomatic DVT are at higher risk for development of a pulmonary embolism. In addition, there is a general belief that patients who have coagulation abnormalities (i.e. Factor V Leiden, Protein C and S deficiency) have an increased risk of developing a pulmonary embolism. Other factors that have been mentioned as associated with PE after total hip arthroplasty include age, female gender, and higher body mass index. The selection of a prophylaxis regimen should be influenced by the ability to mobilise the patient after surgery

This population-based study investigated the incidence and trends in venous thromboembolic disease after total hip and knee arthroplasty over a ten-year period. Death or readmission for venous thromboembolic disease up to two years after surgery for all patients in Scotland was the primary outcome. The incidence of venous thromboembolic disease, including fatal pulmonary embolism, three months after surgery was 2.27% for primary hip arthroplasty and 1.79% for total knee arthroplasty. The incidence of fatal pulmonary embolism within three months was 0.22% for total hip arthroplasty and 0.15% for total knee arthroplasty. The majority of events occurred after hospital discharge, with no apparent trend over the period. The data support current advice that prophylaxis should be continued for at least six weeks following surgery. Despite the increased use of policies for prophylaxis and earlier mobilisation, there has been no change in the incidence of venous thromboembolic disease

This study was undertaken to evaluate the safety and efficacy of retrievable inferior vena cava filters in high-risk orthopaedic patients. A total of 58 patients had a retrievable inferior vena cava filter placed as an adjunct to chemical and mechanical prophylaxis, most commonly for a history of previous deep-vein thrombosis or pulmonary embolism, polytrauma, or expected prolonged immobilisation. In total 56 patients (96.6%) had an uncomplicated post-operative course. Two patients (3.4%) died in the peri-operative period for unrelated reasons. Of the 56 surviving patients, 50 (89%) were available for follow-up. A total of 32 filters (64%) were removed without complication at a mean of 37.8 days (4 to 238) after placement. There were four filters (8%) which were retained because of thrombosis at the filter site, and four (8%) were retained because of incorporation of the filter into the wall of the inferior vena cava. In ten cases (20%) the retrievable filter was left in place to continue as primary prophylaxis. No patient had post-removal thromboembolic complications. A retrievable inferior vena cava filter, as an adjunct to chemical and mechanical prophylaxis, was a safe and effective means of reducing the acute risk of pulmonary embolism in this high-risk group of patients. Although most filters were removed without complications, thereby avoiding the long-term complications that have plagued permanent indwelling filters, a relatively high percentage of filters had to be left in situ

Introduction. Deep venous thrombosis (DVT) is a potentially serious complication after total hip (THA) and knee (TKA) arthroplasty, traditionally justifying aggressive prophylaxis with low molecular weight heparin (LMWH) or direct oral anticoagulants (DOA) at the cost of an increased risk of bleeding. However, fast-track procedures might reduce the DVT risk and decrease the cost-benefit ratio of the current recommendations. The objective of this study was to compare thrombotic and bleeding risk in an unselected population of elective THA and TKA with a fast-track procedure. MATERIAL - METHODS. A series of 1,949 patients were analyzed prospectively. There were 1,136 women and 813 men, with a mean age of 70 years. In particular, 16% were previously treated by antiplatelet agents and 8% by anticoagulants. All patients followed a fast-track procedure including early walking within 24 hours of surgery, and 80% of patients returned home after surgery, with a mean length of stay of 3 days (THA) or 4 days (TKA). The occurrence of a thromboembolic event or hemorrhagic complication has been identified. Results. Out of the 1,110 THAs, 5 thromboembolic events were identified (0.4%): 2 non-fatal pulmonary embolism and 3 DVTs. There was no impact of these complications on the final result. 19 hemorrhagic complications were identified (1.7%): 10 significant haematomas (3 of which were complicated by infection), 9 anemias (with 4 transfusions). Out of the 839 TKAs, 9 thromboembolic events were identified (1.0%): 4 non-fatal pulmonary embolism and 5 DVTs. There was no impact of these complications on the final result. 14 hemorrhagic complications were identified (1.7%): 8 haematomas including 4 reoperations, 6 anemias (with 5 transfusions). Discussion. Thromboembolic complications after elective THA and TKA have virtually disappeared, with a rate of 0.7%. On the other hand, bleeding complications are now more frequent, with a rate of 1.7%. This suggests that the cost-benefit ratio of preventive treatments with LMWH or DOA should be reassessed. Prescribing LMWH or DOA after elective THA and TKA with fast-track procedures exposes the patient to a much higher risk of bleeding than thrombotic risk. The use of aspirin may represent an acceptable compromise in these patients

Atypical femoral fracture non-union (AFFNU) is both, rare (3–5 per 1000 proximal femur fractures) and difficult to treat. Lack of standardised guidelines leads to a variability in fixation constructs, use of bone grafting and restricted weight bearing protocols, which are not evidence based. We hypothesised that there is no change in union rates without the use of bone grafting and immediate weight bearing post-operatively does not lead to increased complications. Materials & Methods. A retrospective review of all consecutively treated AFFNU cases between March 2015 to December 2019 was carried out. 9 patients with a mean age of 63.87 years and M:F ratio of 7:2 met the inclusion criteria. Primary outcome variable was radiographic union at 12 months after revision surgery. All surgeries were carried out by a single surgeon. Fixation construct, neck-shaft angle, use of bone graft and immediate postoperative weight bearing protocols were recorded. Results. Radiographic union was achieved in 7 of 9 patients (78%) after first revision surgery. 1 patient achieved union after 2nd revision surgery and 1 patient died in the early post-operative period due to pulmonary embolism. No bone grafting was used in any of the patients and weight-bearing as tolerated was allowed from the first post-operative day. The mean neck-shaft angle after non-union surgery was 136 degrees. Conclusions. In this case series, the union rate was comparable to those reported in literature previously and achieved without any form of bone grafting. To our knowledge, this is the only case series where no bone grafting was used in the management of AFFNU. Limited by a small sample size and retrospective study design, still, this study brings into question the efficacy of practice of bone grafting and restricted weight-bearing in the management of AFFNU. Bone grafting is associated with the risk of infection at donor site, postoperative pain, and morbidity, while early weight bearing is critical in elderly patients. There is no evidence supporting restricted weight-bearing and it should not be adopted as the default practice as it may even be detrimental to patients

To determine whether pre-operative cessation of anticoagulant or antiplatelet medication is necessary for patients undergoing total shoulder arthroplasty (TSA) or reverse total shoulder arthroplasty (RTSA). A prospectively maintained database was used to identify 213 consecutive patients treated with TSA or RTSA performed by a single surgeon across 3 centres. This cohort included 24 patients on an anticoagulant agent (warfarin, apixaban, rivaroxaban, dabigatran), 52 patients on an antiplatelet agent (aspirin, clopidogrel), and a control group of 137 patients not on anticoagulant or antiplatelet medication. Patients on anticoagulant or antiplatelet medications continued these agents peri-operatively. Outcomes included haemoglobin drop, intra-operative blood loss, operative time, transfusion requirements and post-operative complications. The mean age of the cohort was 74.3 years (range 47 – 93) and 75 (35.2%) of the patients were male. TSA was performed in 63 cases and RTSA in 150 cases. The mean haemoglobin drop in the control group was 17.3 g/L, compared to 19.3 g/L in the anticoagulant group (p = 0.20) and 15.6 g/L in the anti-platelet group (p = 0.14). The mean intra-operative blood loss in the control group was 107.8 mL, compared to 143.0 mL in the anticoagulant group (p = 0.03) and 134.3 mL in the anti-platelet group (0.02). The mean operative time in the control group was 49.3 minutes, compared to 47.1 minutes in the anticoagulant group (p = 0.56) and 50.3 minutes in the anti-platelet group (p = 0.78). Post-operatively no patients developed a wound infection or haematoma requiring intervention. Three patients not on anticoagulant or antiplatelet medication developed pulmonary embolism. Continuing anticoagulant or antiplatelet medication was associated with higher intra-operative blood loss, but produced no statistically significant differences in haemoglobin drop, operative time, transfusion requirements or post-operative complications. We now do not routinely stop any anticoagulant or antiplatelet medication for patients undergoing total shoulder arthroplasty

Introduction. Computer hexapod assisted orthopaedic surgery (CHAOS) has previously been shown to provide a predictable and safe method for correcting multiplanar femoral deformity. We report the outcomes of tibial deformity correction using CHAOS, as well as a new cohort of femoral CHAOS procedures. Materials and Methods. Retrospective review of medical records and radiographs for patients who underwent CHAOS for lower limb deformity at our tertiary centre between 2012–2020. Results. There were 70 consecutive cases from 56 patients with no loss to follow-up. Mean age was 40 years (17 to 77); 59% male. There were 48 femoral and 22 tibial procedures. Method of fixation was intramedullary nailing in 47 cases and locking plates in 23. Multiplanar correction was required in 43 cases. The largest correction of rotation was 40 degrees, and angulation was 28 degrees. Mean mechanical axis deviation reduction per procedure was 17.2 mm, maximum 89 mm. Deformity correction was mechanically satisfactory in all patients bar one who was under-corrected, requiring revision. Complications from femoral surgery included one under-correction, two cases of non-union, and one pulmonary embolism. Complications from tibial surgery were one locking plate fatigue failure, one compartment syndrome, one pseudoaneurysm of the anterior tibial artery requiring stenting, and one transient neurapraxia of the common peroneal nerve. There were no deaths. Conclusions. CHAOS can be used for reliable correction of complex deformities of both the femur and tibia. The risk profile appears to differ between femoral and tibial surgeries

We performed a systematic review and meta-analysis to compare the efficacy of intermittent mechanical compression combined with pharmacological thromboprophylaxis, against either mechanical compression or pharmacological prophylaxis in preventing deep-vein thrombosis (DVT) and pulmonary embolism in patients undergoing hip or knee replacement. A total of six randomised controlled trials, evaluating a total of 1399 patients, were identified. In knee arthroplasty, the rate of DVT was reduced from 18.7% with anticoagulation alone to 3.7% with combined modalities (risk ratio (RR) 0.27, p = 0.03; number needed to treat: seven). There was moderate, albeit non-significant, heterogeneity (I. 2. = 42%). In hip replacement, there was a non-significant reduction in DVT from 8.7% with mechanical compression alone to 7.2% with additional pharmacological prophylaxis (RR 0.84) and a significant reduction in DVT from 9.7% with anticoagulation alone to 0.9% with additional mechanical compression (RR 0.17, p < 0.001; number needed to treat: 12), with no heterogeneity (I. 2. = 0%). The included studies had insufficient power to demonstrate an effect on pulmonary embolism. We conclude that the addition of intermittent mechanical leg compression augments the efficacy of anticoagulation in preventing DVT in patients undergoing both knee and hip replacement. Further research on the role of combined modalities in thromboprophylaxis in joint replacement and in other high-risk situations, such as fracture of the hip, is warranted

Introduction. Venous thromboembolism (VTE), including pulmonary embolism (PE) resulting from deep vein thrombosis (DVT), remains a well-known serious complication after femoral fractures. The low molecular heparin is widely used to prevent VTE. This study compared the effectiveness of VTE prevention between dalteparin and enoxaparin. Materials and Methods. From 2013 to 2014, we retrospectively recruited 712 patients who had femoral fractures with operative treatment. All patients receiving VTE chemoprophylaxis with perioperative period using dalateparin in Group 1(N=395) and enoxaparin in Group 2(N=317). The prophylactic dosing was determined using individual product labeling and identified as enoxaparin 40 mg every 12 hours and dalteparin 2500 international unit (IU) once daily, based on clinical practice guidelines. The prophylaxis was started at admission, and maintained during average 8.43.5 days after operation. The outcome including the incidence of clinically significant deep vein thrombosis, pulmonary embolism, perioperative bleeding and cost of drugs were evaluated between two groups. Results. The two study groups did not differ significantly in fracture type, age, gender, ASA score. The overall incidence of VTE is similar between two groups. However, the incidence of fatal PE is significantly lower in patients with dalteparin (Group 1: 4/395(1.00%), Group 2: 10/317(3.15%), p<0.001). And the overall cost of each group is significantly different between two groups (Group 1: average KRW 89,426, Group 2: average KRW 32,188, p<0.001). Conclusion. Both dalteparin and enoxaparin could be safely used without notable complications in VTE prophylaxis. However, dalteparin had more advantages for prevention of fatal PE, compared to enoxaparin in patients with femoral fractures with significant cost effectiveness

Venous thromboembolic events, either deep vein thromboses or pulmonary emboli, are important complications in patients undergoing knee or hip arthroplasty. The purpose of this study was to evaluate the effectiveness of a mobile compression device (ActiveCare+S.F.T.®; Medical Compression Systems, Inc., Or Akiva, Israel) with or without aspirin compared with current pharmacology protocols for venous thromboembolism prophylaxis in patients undergoing elective primary unilateral lower extremity joint arthroplasty. A multicenter registry was established to capture the rate of symptomatic venous thromboemboli following primary lower extremity joint arthroplasty in 3,060 patients from ten sites including knee arthroplasty (1,551) or hip arthroplasty (1,509). All patients were 18 years of age or older with no known history of venous thromboembolism, coagulation disorder, or solid tumor. Use of the compression device began peri-operatively and continued for a minimum of ten days. Patients with symptoms of deep venous thrombosis or pulmonary embolism underwent duplex ultrasonography and/or spiral computed tomography. All patients were evaluated at three months post-operatively to document any evidence of deep venous thrombosis or pulmonary embolism. Of 3,060 patients, twenty-eight (0.92%) had venous thromboembolism (20 distal deep venous thromboses, 3 proximal deep venous thromboses, and 5 pulmonary emboli). One death occurred with no autopsy performed. Symptomatic venous thromboembolic rates observed in lower extremity joint arthroplasty patients using the mobile compression device were non-inferior (not worse than) at a margin of 1.0% to rates reported for pharmacological prophylaxis, including warfarin, enoxaparin, rivaroxaban, and dabigatran except in the knee arthroplasty group where the mobile compression device fell short of rivaroxaban by 0.06%. Use of the mobile compression device with or without aspirin for patients undergoing lower extremity joint arthroplasty provide a non-inferior risk for developing venous thromboembolism compared with current pharmacological protocols reported in the literature