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Background: Most studies on acute Achilles tendon rupture (AATR) and its treatment contain only a small number of patients, and due to selection criteria, older patients and those with comorbidities are typically excluded. Therefore, little is known about true complication rates in an unselected population reflecting the situation in an ordinary orthopedic department. Method: Patient files of 639 consecutive Achilles tendon repairs in 631 patients with AATR between February 1998 and December 2005 were reviewed, and all complications from the day of surgery until December 2011 were identified using the hospital's patient records and the Swedish national registry. Results: Twenty-five (3.9%) re-operations were done, out of which 22 were due to a re-rupture. Fifty-one (8.6%) cases were of deep vein thrombosis (DVT), no difference between patients given versus patients not given thromboprophylaxis. Nineteen (3.0%) cases were of surgical site infection (SSI), all of which resolved upon oral antibiotics. Conclusions: Surgical repair of acute Achilles tendon rupture was associated with a low risk for re-operations, but the risk for deep vein thrombosis was considerable, despite the use of prophylaxis. [ABSTRACT FROM AUTHOR]

This retrospective study aimed to investigate the preoperative incidence and locations of deep venous thrombosis (DVT) in patients undergoing surgeries for ankle fractures and identify the associated risk factors. From January 2016 to June 2019, 1,532 patients undergoing surgery of ankle fractures were included. Their inpatient medical records were inquired for data collection, including demographics, comorbidities, injury-related data and preoperative laboratory biomarkers. DVT of bilateral lower extremities was diagnosed by routine preoperative Doppler examination. Univariate analyses and multivariate logistic regression analyses were used to identify the independent risk factors. Totally, 98 patients had a preoperative DVT, indicating an incidence rate of 6.4%. A total of 164 clots for 6 veins were found, representing an average of 1.7 for each patient. The detailed DVTs involving veins were as follows: 2 in femoral common vein, 7 in superficial femoral vein, 2 in deep femoral vein, 16 in popliteal vein, 49 in posterior tibial vein, and 88 in peroneal vein. In the multivariate model, 5 risk factors were identified to be associated with DVT, including age (10-year increase), gender, lower ALB level, reduced LYM count and elevated D-dimer level. There was a tendency for diabetes mellitus to increase the risk of DVT, although there was no statistical significance (p = 0.063). These epidemiologic data on DVT may help counsel patients about the risk of DVT, individualized risk assessment and accordingly the risk stratification. [ABSTRACT FROM AUTHOR]

The aim is to study risk factors for retinal vein occlusion (RVO), such as thrombophilic and cardiovascular risk factors (CRF). A retrospective consecutive case series of 60 patients with RVO was made, tested for CRF, hyperhomocysteinemia, lupic anticoagulant, antiphospholipid antibody and 5 gene variants: factor V (FV) Leiden (G1691A), factor II (PT G20210A), 5,1-methylenetetra-hydrofolate reductase (MTHFR; 677 C > T and 1298 A > C), plasminogen activator inhibitor 1 (PAI-1; 4 G/5 G). More than 1 CRF were present in 36 patients (60%), which had a significantly higher mean age at diagnosis (66.7 ± 12.9 versus 59.5 ± 13.7 with ≤1 CRF, [t(57) = −2.05, p = 0.045, d = 0.54). Patients with thermolabile MTHFR forms with decreased enzyme activity (T677T or C677T/A1298C) had a significant lower mean age [57.6 ± 15.1; t (58) = 3.32; p = 0.002; d = 0.846] than patients with normal MTHFR enzyme activity (68.5 ± 10.2). Regarding CRF and thermolabile forms of MTHFR, the mean age at diagnosis could be significantly predicted [F(2,56) = 7.18; p = 0.002] by the equation: 64.8 − 10.3 × (thermolabile MTHFR) − 5.31 × (≤ 1CRF). Screening of MTHFR polymorphisms may be useful in younger RVO patients, particularly when multiple CRF are absent. [ABSTRACT FROM AUTHOR]

Portomesenteric venous thrombosis (PMVT) is a rare and potentially life-threatening condition with high morbidity and mortality. Its incidence is low as complication of bariatric surgery and laparoscopic sleeve gastrectomy (LSG) and the reason is unclear and is likely multifactorial. Genetic predisposition, oral contraceptive, thrombophilia, intra-abdominal pressure due to pneumoperitoneum, reverse Trendelenburg position, prolonged operation time, DM, and obesity may be considered as risk factors. Extended low-molecular-weight heparin anticoagulation prophylaxis to prevent PMVT is a reasonable choice for patients after LSG; however, no clear guidelines about the optimal dose, duration, and type of heparin are currently available. In this study, we present a case of a 50-year-old woman who was admitted to the emergency department for abdominal pain 2 weeks after LSG. Her computed tomography scan showed a portomesenteric venous thrombosis. Our review of the English literature found only 137 morbidly obese patients who had developed PMVT after bariatric surgery between 2002 and July 2018, demonstrating rarity of this complication. [ABSTRACT FROM AUTHOR]

Purpose: Tranexamic acid has been shown to be effective in reducing blood loss after total hip replacement. The purpose of this study was to prospectively assess the effectiveness of topical TXA use to reduce blood loss after primary total hip replacement and to compare these outcomes with those of a matched control group from a similar cohort that did not have received tranexamic acid.Methods: This is a prospective matched control study to assess the effect of a 2 g topical tranexamic acid in 50 mL physiological saline solution in total hip replacement. Primary outcomes were hemoglobin and hematocrit drop, and total blood loss. Secondary outcomes were transfusion rates, length of hospital stay, deep vein thrombosis, and pulmonary embolism events.Results: We could match 100 patients to a control group. There were no statistical significantly differences between the two groups. The hemoglobin and hematocrit postoperative values were significantly higher in topical tranexamic acid group than in control group (P < 0.001). The mean total blood loss was 769 in topical tranexamic acid group and 1163 in control group with significant differences (P = 0.001), which meant 34% reduction in total blood loss. Length of stay was lower in topical tranexamic acid group. The risk of deep vein thrombosis and pulmonary events did not increase.Conclusions: A single dose of 2 g tranexamic acid in 50 mL physiological saline solution topical administration was effective and safe in reducing bleeding in patients undergoing unilateral primary non-cemented total hip replacement compared to a matched control group. [ABSTRACT FROM AUTHOR]

Background: Pulmonary thromboembolism (PE) is one of the life-threatening complications of gastric cancer surgery. D-dimer assay is a safe and rapid tool to exclude the presence of deep venous thrombosis (DVT). In July 2012, we started preoperative DVT screening of patients scheduled for gastric cancer surgery using a combination of D-dimer measurements and lower extremity venous ultrasonography to prevent PE. Methods: Between July 2012 and August 2015, 976 consecutive patients underwent gastric cancer surgery with preoperative D-dimer screening. Lower extremity venous ultrasonography was performed in patients with a positive D-dimer assay result (greater than 1.0 μg/ml). The incidence of and risk factors for preoperative DVT and the incidence of PE were examined in patients undergoing gastric cancer surgery. Results: Of the 976 patients, 176 (18.0%) showed positive D-dimer assay results, and in 13 (1.3%) DVT was diagnosed by lower extremity ultrasonography. Our analysis identified neoadjuvant chemotherapy as a risk factor for preoperative detection of DVT in patients undergoing gastric cancer surgery ( P = 0.021). The incidence of PE was 0.1% (1/976). Conclusion: Preoperative gastric cancer patients receiving neoadjuvant chemotherapy seem to be at higher risk for the development of DVT. [ABSTRACT FROM AUTHOR]

Objective: Peripherally inserted central catheter (PICC) use continues to increase, leading to the development of a blind bedside technique (BST) for placement. The aim of our study was to compare the BST with the fluoroscopically guided technique (FGT), with specific regard to catheter tip position (CTP).Materials and Methods: One hundred eighty patients were randomized to either the BST or the FGT. All procedures were done by the same interventional team and included postprocedural chest X-ray to assess CTP. Depending on the international guidelines for optimal CTP, patients were classified in three types: optimal, suboptimal not needing repositioning, and nonoptimal requiring additional repositioning procedures. Fisher's test was used for comparisons.Results: One hundred seventy-one PICCs were successful inserted. In the BST groups, 23.3% of placements were suboptimal and 30% nonoptimal, requiring repositioning. In the FGT group, 5.6% were suboptimal and 1.1% nonoptimal. Thus, suboptimal and nonoptimal CTP were significantly lower in the FGT group (p < 0.001).Conclusion: Tip malposition rates are high when using blind BST, exposing the patient to an increased risk of deep venous thrombosis and catheter malfunction. Using the FGT or emerging technologies that could help tip positioning are recommended, especially for long-term indications.Key Points: • Bedside and fluoroscopy guided techniques are commonly used for PICC placement. • Catheter malposition is the major technical issue with the bedside technique. • Catheter malposition occurred in 53% of patients with the bedside technique. [ABSTRACT FROM AUTHOR]

Background: Patients with subarachnoid hemorrhage (SAH) frequently need a ventriculostomy for treatment of hydrocephalus. In some ICU practices, a ventriculostomy is considered a relative contraindication for subcutaneous heparin. We studied the risk of ventriculostomy-associated hemorrhage and deep venous thrombosis (DVT) in patients with anticoagulant prophylaxis.Methods: This is a retrospective study of 241 consecutive patients with SAH and ventriculostomies treated at Mayo Clinic, Rochester from 2001 to 2014. DVT and pulmonary emboli (PE) prevention included subcutaneous or intravenous heparin, enoxaparin, dalteparin, and warfarin. The incidence of PE and DVT were noted within 30 days of hospital admission. Hemorrhages were classified as minor or major based on size and mass effect.Results: Fifty-three (22 %) of the 241 patients were on prophylactic doses of anticoagulation while in the intensive care unit. Three of 53 patients on prophylactic anticoagulation had minor hemorrhages and none had major hemorrhages. Four (7.5 %) of 53 patients who received prophylactic anticoagulation versus 34 (18 %) of 188 patients who did not receive prophylactic anticoagulation developed DVT (p = 0.09). One of 10 patients on therapeutic anticoagulation had a major and fatal hemorrhage.Conclusion: In our cohort, the risk of VTE was reduced by more than half in patients receiving chemoprophylaxis. Ventriculostomy-associated hemorrhages were rare and minor. Anticoagulant thromboprophylaxis is mostly safe and required in aneurysmal SAH. [ABSTRACT FROM AUTHOR]

Background: Venous thromboembolism (VTE) is a major health care problem resulting in significant mortality, morbidity and increase in medical expenses. Patients with malignant diseases represent a high risk population for VTE. The American College of Chest Physicians (ACCP) proposed, since 1986, prophylaxis guidelines that are unequally respected in surgical practice. Methods: DIONYS is a multinational, longitudinal and non-interventional registry including patients having undergone abdominal or pelvic surgery for cancer in Latin America, Africa and the Middle East. Patients were evaluated with regard to VTE prophylaxis, during three consecutive visits, for their adherence to ACCP 2008 guidelines. Data were collected on type and duration of VTE prophylaxis, adherence to guidelines, and compliance with prescriptions, complications and possible reasons for omission of prophylaxis. Results: Between 2011 and June 2012, 921 adult patients were included and divided into abdominal (435), pelvic (390) and combined abdominal and pelvic surgery (96), 65.4 % being females. VTE prophylaxis was prescribed to 90 % of patients during hospitalization and to 28.3 % after hospital discharge. Prescriptions adhered to ACCP guidelines in 73.9 % of patients during hospitalization and 18.9 % after discharge. The reason of non-adherence was mainly the clinical judgment by the physician that the patient did not need a prophylaxis. The most commonly prescribed type of prophylaxis was pharmacological (low molecular weight heparin). Conclusion: A wide gap exists between VTE prophylaxis in daily practice and the ACCP 2008 guidelines, in abdominal and pelvic cancer surgery. A better awareness of surgeons is probably the best guarantee for improvement of VTE prophylaxis in surgical wards. [ABSTRACT FROM AUTHOR]

Venous thromboembolism (VTE) is a common complication of hematopoietic stem cell transplantation (HSCT). Graft-versus-host disease (GVHD) is another complication of HSCT that may modify the risk of VTE. Our objective was to explore the incidence of VTE (deep venous thrombosis and pulmonary embolism) following HSCT and to evaluate its association with GVHD. A comprehensive search of Medline In-Process & Other Non-Indexed Citations, MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials, and Scopus was conducted to search for both retrospective and prospective HSCT studies which had reported VTE. Random-effects meta-analysis was used to pool incidence rates. We included 17 studies reporting on allogeneic- and 10 on autologous-HSCT; enrolling 6693 patients; of which 5 were randomized. The overall incidence of VTE after HSCT was 5 % (4-7 %). Incidence in allogeneic-HSCT was 4 % (2-6 %) and in autologous-HSCT was 4 % (1-15 %). Eleven and nine studies reported data on acute and chronic GVHD, respectively. The incidence of VTE in chronic GVHD was 35 % (20-54 %), whereas in acute GVHD it was 47 % (32-62 %). Based on the results of this meta-analysis, VTE is a fairly common complication after HSCT, emphasizing the importance of assimilating guidelines for both treatment and prophylaxis in this patient population. [ABSTRACT FROM AUTHOR]

Background: Venous thromboembolism (VTE) is an important and potentially life-threatening complication in focal segmental glomerulosclerosis (FSGS). The aim of this study was to investigate the prevalence and predisposing risk factors of venous thromboembolism in patients with FSGS with nephrotic syndrome. Methods: A total of 120 FSGS patients with nephrotic syndrome were enrolled in this study. Venous thromboembolism was confirmed by contrast-enhanced dual-source computed tomography angiography or magnetic resonance venography. Potential clinical and laboratory risk factors for VTE were screened. Results: Venous thrombosis was demonstrated in 12 (10 %) patients. Venous thrombosis occurred during the first episode of nephrotic syndrome in 3 patients and during a relapse in 9 patients. Eight patients had a pulmonary embolism, four had a renal vein thrombosis, three had a lower limb deep vein thrombosis, one had a cerebral sinovenous thrombosis, and one had a portal vein thrombosis. The positive predictive value for the D-dimer level was 22.4 % in the patients with FSGS, and the negative predictive value for the D-dimer level was 100 %. Of the screened risk factors, higher hematocrit and relapse of nephrotic syndrome were risk factors for VTE. Other risk factors, such as proteinuria, hypoalbuminemia, platelet count, fibrinogen level, and antithrombin III level, were not risk factors for VTE in patients with FSGS. Conclusion: We found that the prevalence of venous thromboembolism is approximately 10 % in FSGS patients with nephrotic syndrome. Most of the patients had a PE. Hemoconcentration and relapse of nephrotic syndrome were risk factors for the development of VTE in FSGS. Negative D-dimer may exclude venous thromboembolism in patients with nephrotic syndrome. [ABSTRACT FROM AUTHOR]

Our goal was to evaluate the clinical patterns, additional risk factors, treatment and outcome of cerebral venous thrombosis (CVT) related to adolescent oral contraceptive pill (OCP) usage. We evaluated 22 patients with CVT related to OCPs admitted to Firat and Dicle University Hospitals from January 2008 to January 2013. We assessed the clinical features, risk factors, imaging results and prognosis. Magnetic resonance imaging (MRI) and magnetic resonance were the preferred procedures for the diagnosis of CVT. MRI revealed parenchymal lesions in 11 (50 %) patients, and the remaining patients had normal MRIs. The sinuses most frequently affected by thrombosis were the superior sagittal sinus and the transverse sinus. The additional risk factors identified for CVT were antiphospholipid syndrome, protein C deficiency, protein C and S deficiency, factor V Leiden associated with heterozygous antithrombin III deficiency, methylenetetrahydrofolate reductase and prothrombin gene mutations. CVT may be overlooked in adolescents because it is more common among middle-aged and elderly adults. CVT should be suspected in the presence of neurological symptoms in adolescents, especially in those using OCPs. [ABSTRACT FROM AUTHOR]

Obesity is a risk factor for arterial and venous thromboembolism. However, it is not known whether obesity mediates risk through shared mechanisms. In a population-based cohort, we aimed to compare the impact of obesity measures on risk of venous thromboembolism (VTE) and myocardial infarction (MI), and explore how obesity-related atherosclerotic risk factors influenced these relationships. Measures of body composition including body mass index , waist circumference (WC), hip circumference (HC), waist-hip ratio (WHR) and waist-to-height ratio (WHtR) were registered in 6,708 subjects aged 25-84 years, who participated in the Tromsø Study (1994-1995). Incident VTE- and MI-events were registered until January 1, 2011. There were 288 VTEs and 925 MIs during a median of 15.7 years of follow-up. All obesity measures were related to risk of VTE. In linear models, WC showed the highest risk estimates in both genders. In categorized models (highest versus lowest quintile), WC showed highest risk in men (HR 3.59; 95 % CI 1.82-7.06) and HC in women (HR 2.27; 95 % CI 1.54-4.92). Contrary, WHR and WHtR yielded the highest risk estimates for MI. The HR of MI (highest vs. lowest quintile) for WHR was 2.11 (95 % CI 1.59-2.81) in men and 1.62 (95 % CI 1.13-2.31) in women. The risk estimates for MI were substantially attenuated after adjustment for atherosclerotic risk factors, whereas the estimates for VTE remained unchanged. Our findings suggest that the impact of body fat distribution, and the causal pathway, differs for the association between obesity and arterial and venous thrombosis. [ABSTRACT FROM AUTHOR]

Background: Studies suggest that postoperative complications are a risk factor for venous thromboembolism (VTE) after bariatric surgery. Knowledge of factors associated with a higher risk of VTE after bariatric surgery may be essential to select patients who may benefit from either prolonged or intensified thrombosis prophylaxis. The aim of this study is to determine the relationship between postoperative complications and VTE after bariatric surgery and other classical risk factors. Methods: A retrospective multicenter case-control study was performed in patients who had bariatric surgery between January 2008 and September 2011. VTE until 6 months after surgery was registered, and patients were contacted to ascertain the results. For every case of VTE after surgery, 6 control patients were selected who were matched for gender, age, participating center and type of surgery. Risk factors for VTE before and after surgery and postoperative complications were registered. Results: A total of 2,064 surgeries were included. In 12 patients, VTE occurred within 6 months after bariatric surgery (incidence 0.58 %, 95 % confidence interval (CI) = 0.25-0.93). There was a strong association of complications after surgery (cases 91.7 %, controls 15.3 %, odds ratio (OR) 61.0; 95 % CI = 7.1-521.3) or intensive care admission (cases 50.0 %, controls 11.1 %, OR = 8.0; 95 % CI = 2.1-30.8) with VTE. The majority of postoperative complications were anastomotic leak, abdominal abscess, and infection. We could not detect an association between classical thrombosis risk factors and postoperative VTE. Conclusions: The incidence of VTE is low after bariatric surgery using thrombosis prophylaxis. However, there is a strong association between postoperative complications and VTE. These patients may benefit from more intensive thrombosis prophylaxis. [ABSTRACT FROM AUTHOR]

Few studies have associated height with cardiovascular diseases other than myocardial infarction. We conducted a population-based 36-year cohort study of 12,859 men born in 1955 or 1965 whose fitness for military service was assessed by Draft Boards in Northern Denmark. Hospital diagnoses for ischemic heart diseases, atrial fibrillation, stroke, and venous thromboembolism were obtained from the Danish National Patient Registry, covering all Danish hospitals since 1977. Mortality data were obtained from the Danish Civil Registration System. We began follow-up on the 22nd birthday of each subject and continued until occurrence of an outcome, emigration, death, or 31 December 2012, whichever came first. We used Cox regression to compute hazard ratios (HRs) with 95 % confidence intervals (CIs). Compared with short stature, the education-adjusted HR among tall men was 0.67 (95 % CI 0.54-0.84) for ischemic heart disease (similar for myocardial infarction, angina pectoris, and heart failure), 1.60 (95 % CI 1.11-2.33) for atrial fibrillation, 1.05 (95 % CI 0.75-1.46) for stroke, 1.04 (95 % CI 0.67-1.64) for venous thromboembolism, and 0.70 (95 % CI 0.58-0.86) for death. In conclusion, short stature was a risk factor for ischemic heart disease and premature death, but a protective factor for atrial fibrillation. Stature was not substantially associated with stroke or venous thromboembolism. [ABSTRACT FROM AUTHOR]

Background: Trauma patients are known to be at increased risk of venous thromboembolism (VTE), and pulmonary embolism (PE) is one of the preventable causes of mortality in trauma patients. The incidence of VTE in Asian populations was believed to be lower than in Caucasians, but the recent literature suggests that this is not the case. The purpose of this study was to assess the incidence of VTE in Asian major trauma patients and to examine the manner of presentation, use of prophylaxis and risk factors for VTE. While other studies of VTE have addressed general and high-risk populations within Asia, our study is one of the few to examine Asian major trauma patients. Methods: Data for all patients with VTE were extracted from the Singapore General Hospital trauma database over a 10-year period from 1998 to 2007. Patient profiles and clinical factors were compared to patients without a diagnosis of VTE admitted with injuries in the same time period. Results: There were 8,615 patients entered into our database in this 10-year period. Thirty-four patients had VTE, with an overall incidence of 0.39 %. Thirteen patients had pulmonary embolism, an incidence of 0.15 %. Of note, 30 % of patients with deep vein thrombosis (DVT) presented with fever alone without limb symptoms. Almost all 34 patients who developed VTE had either head injury, a spinal cord injury or a pelvic/extremity injury. Eighteen patients had head injury, 22 patients sustained pelvic or extremity injury, and three patients had spinal cord injury with paraplegia. Head injury and spinal cord injury with neurologic sequelae were statistically significant risk factors for VTE ( p < 0.05). Conclusion: The incidence of symptomatic VTE in the Asian trauma population is no lower than in the West. The incidence found in this study is similar to the incidence of VTE according to a study using data from the American national trauma data bank using similar study methods and with a similar study population. It is also higher than the incidence in the literature for general post-surgical Asian patients. Fever was the presenting factor in some patients and screening for VTE should not be forgotten when assessing fever in the trauma patient. The strong association between head injury, spinal cord injury and VTE confirms that we should pay special attention to VTE prophylaxis for our patients with these injuries. [ABSTRACT FROM AUTHOR]

Deep vein thrombosis (DVT) is a common multi-factorial disease, with serious short- and long-term complications, and a potential fatal outcome. Many genes are involved in determining the interindividual variation in traits that define the onset and progression of disease, as well as the response to treatment. Several association studies have designed the relationship between factor XII C46T polymorphism and the risk of arterial and venous thrombosis. Some studies reported that FXII gene polymorphism is not associated with venous thrombosis, whereas other studies found an increased risk of venous thrombosis in carriers of a FXII-T variant. We constructed an age-gender-ethnic-matched case-control study including 52 DVT patients and 100 healthy volunteers. C46T polymorphism of the coagulation factor XII was carried out using allelic discrimination assay by real-time polymerase chain reaction for patients and controls, while plasma factor XII activity was detected by one-step clotting assay. FXII C46T genotyping in DVT patients revealed that 34.6% were heterozygous harboring the FXII-CT heterotype and 3.85% were homozygous; FXII-TT homotype, with no statistically significant difference in the distribution of the mutant genotypes between DVT patients and the control group. FXII activity was significantly reduced in DVT patients harboring the mutant genotypes. In the present study, FXII C46T gene polymorphism was not associated with increased risk of deep venous thrombosis. [ABSTRACT FROM AUTHOR]

Higher frequencies of pregnancy complications have been reported among women with sickle cell disease (SCD) compared with those without SCD; however, past studies are limited by small sample size, narrow geographic area, and use of hospital discharge data. We compared the prevalence of maternal complications among intrapartum and postpartum women with SCD to those without SCD in a large, geographically diverse sample. Data from the 2004-2010 Truven Health MarketScan Multi-State Medicaid databases were used to assess the prevalence of maternal complications among intrapartum and postpartum women 15-44 years of age with and without SCD whose race was reported as black. The comparison group of women without SCD was further divided into those with chronic conditions associated with multi-organ failure and those without chronic conditions. Multivariable log-binomial regression models were used to calculate adjusted prevalence ratios for outcomes for women with SCD compared with women in the two comparison groups. Of the 335,348 black women with a delivery during 2004-2010, 1,526 had a diagnosis of SCD (0.5 %). Compared with women without SCD who had chronic conditions, women with SCD had higher prevalence of deep vein thrombosis, pulmonary embolism, obstetric shock, pneumonia, sepsis, postpartum infection, and transfusions. SCD was also positively associated with acute renal failure, cerebrovascular disorder, respiratory distress syndrome, eclampsia, postpartum hemorrhage, preterm birth, and ventilation when compared with women without SCD and chronic conditions. Overall, women with SCD have increased prevalence of pregnancy complications, even when compared with a group of women with similar risk for multi-organ failure. [ABSTRACT FROM AUTHOR]

Background: Whereas prevention of cardiovascular diseases by hormonal replacement therapy is still part of an ongoing debate, well-defined data are available relating hormonal replacement therapy to an elevated risk of venous thrombosis and embolism. Although it seems that venous thrombosis in patients treated with hormonal replacement therapy is linked to changes in plasmatic coagulation, less is known about the role of platelet-derived microparticles, as well as endothelial cell-derived microparticles. Patients and methods: In this prospective case-control study, levels of microparticles were investigated in postmenopausal women receiving hormone replacement therapy ( n = 15) and compared to age-matched controls ( n = 15). Results: Total count of microparticles and the subgroup of microparticles derived from endothelial cells did not differ in the investigated groups. In contrast, median levels of microparticles derived from platelet/megacaryocyte were higher in women taking hormonal replacement therapy (5,244 × 10/l) than in controls (2,803 × 10/l; p = 0.040). Furthermore, hormonal replacement therapy led to a higher plasma level of microparticles derived from activated platelets, exposing P-selectin (136 × 10/l vs. 58 × 10/l; p = 0.011), or exposing CD63 (171 × 10 vs. 91 × 10/l; p = 0.011) compared to the control group. Conclusion: Higher concentrations of microparticles derived from (activated) platelets/megacaryocytes were present in postmenopausal women taking hormonal replacement therapy. This finding indicates a procoagulant state in these women and might play a role in the development of venous side effects. In contrast, levels of endothelial cell-derived microparticles did not differ. [ABSTRACT FROM AUTHOR]

Purpose: Venous thromboembolic disease following skeletal polytrauma is a major issue for trauma surgeons, but there is no consensus of opinion regarding the optimal form of prophylaxis. The purpose of this paper was to compare the incidence of venous thromboembolic events (VTE) after major skeletal trauma managed with different prophylactic methods and their combinations. Methods: A search of AMED, CINAHL, Cochrane Library, EMBASE and MEDLINE databases was performed from their inception to July 2010. A search of unpublished literature databases was undertaken. All randomised controlled trials assessing the incidence of VTE events between two or more forms of thromboprophylaxis for patient following major skeletal trauma were included. Two reviewers independently identified all eligible articles, extracted the data, and critically appraised all included publications using the Critical Appraisal Skills Programme tool. Results: A total of 11 papers were identified. The findings of this study suggest that low molecular weight heparin (LMWH) may be superior to low dose heparin (LDH), and that LMWH should be used in addition to mechanical prophylaxis measures in patients following major skeletal trauma. There is limited evidence for the use of electrostimulation. There appeared to be no significant difference between the use of LDH compared to calf compression devices. However, the evidence-base was insufficient in both size and methodological quality. Conclusions: There is currently insufficient research to be able to inform trauma surgeons as to the optimal method of thromboprophylaxis for patients following major skeletal trauma. [ABSTRACT FROM AUTHOR]

Venous thromboembolism (VTE) is one of the most common preventable cause of morbidity and mortality after trauma. Though most of the western countries have their guidelines for thromboprophylaxis in these patients, India still does not have these. The increasing detection of VTE among Indian population, lack of awareness, underestimation of the risk, and fear of bleeding complications after chemical prophylaxis have made deep vein thrombosis (DVT) a serious problem, hence a standard guideline for thromboprophylaxis after trauma is essential. The present review article discusses the incidence of DVT and role of thromboprophylaxis in Indian patients who have sustained major orthopedic trauma. A thorough search of 'PubMed' and 'Google Scholar' revealed 10 studies regarding venous thromboembolism in Indian patients after major orthopedic trauma surgery (hip or proximal femur fracture and spine injury). Most of these studies have evaluated venous thromboembolism in patients of arthroplasty and trauma. The incidence, risk factors, diagnosis and management of VTE in the subgroup of trauma patients (1049 patients) were separately evaluated after segregating them from the arthroplasty patients. Except two studies, which were based on spinal injury, all other studies recommended screening/ thromboprophylaxis in posttraumatic conditions in the Indian population. Color Doppler was used as common diagnostic or screening tool in most of the studies (eight studies, 722 patients). The incidence of VTE among thromboprophylaxis-receiving group was found to be 8% (10/125), whereas it was much higher (14.49%, 40/276) in patients not receiving any form of prophylaxis. Indian patients have definite risk of venous thromboembolism after major orthopedic trauma (except spinal injury), and thromboprophylaxis either by chemical or mechanical methods seems to be justified in them. [ABSTRACT FROM AUTHOR]

We discuss the analytic and practical considerations in a large case–control study that had two control groups; the first control group consisting of partners of patients and the second obtained by random digit dialling (RDD). As an example of the evaluation of a general lifestyle factor, we present body mass index (BMI). Both control groups had lower BMIs than the patients. The distribution in the partner controls was closer to that of the patients, likely due to similar lifestyles. A statistical approach was used to pool the results of both analyses, wherein partners were analyzed with a matched analysis, while RDDs were analyzed without matching. Even with a matched analysis, the odds ratio with partner controls remained closer to unity than with RDD controls, which is probably due to unmeasured confounders in the comparison with the random controls as well as intermediary factors. However, when studying injuries as a risk factor, the odds ratio remained higher with partner control subjects than with RRD control subjects, even after taking the matching into account. Finally we used factor V Leiden as an example of a genetic risk factor. The frequencies of factor V Leiden were identical in both control groups, indicating that for the analyses of this genetic risk factor the two control groups could be combined in a single unmatched analysis. In conclusion, the effect measures with the two control groups were in the same direction, and of the same order of magnitude. Moreover, it was not always the same control group that produced the higher or lower estimates, and a matched analysis did not remedy the differences. Our experience with the intricacies of dealing with two control groups may be useful to others when thinking about an optimal research design or the best statistical approach. [ABSTRACT FROM AUTHOR]

The article describes the risk factors of central venous lines-related venous thrombosis (CVL-VT) detected by spiral computed tomography and ultrasound in 70 consecutive children with acute lymphoblastic leukemia. The known risk factors for CVL-VT in children are large lumen of CVL, external catheters, location and timing of CVL placement, disease treatment and thrombophilia.

A letter to the editor is presented related to complications of CD2-positive follicular lymphoma developed due to venous thrombosis in surface vein.

The article discusses a study on the safety of pregnancies in women who suffered cerebral venous thrombosis (CVT). The study reviewed a number of titles and abstracts to examine the risk of CVT in pregnant patients. The results revealed lower rates of recurrent CVT and extracerebral venous thrombotic events (VTE) in patients who were treated with antithrombotic prophylaxis and heparin.

Background: Deep venous Thrombosis is a serious, possible life threatening event which is often ignored in psychiatric Settings. Purpose: In this paper three cases of deep venous Thrombosis (DVT) following the use of olanzapine and risperidone are presented. Methods: The data of Three patients was collected from hospital records. Results: The patients were in good general physical health and had no personal or familial history of DVT. The patients were not overweight (BMI < 25) but they suffered from DVT after initiating risperidone and olanzapine. Conclusion: Risk of DVT exists in patients under treatment with atypical antipsychotics in spite of no pre existing risk factor. [ABSTRACT FROM AUTHOR]

Deep vein thrombosis (DVT) is common seen in patients undergoing spine surgery. However, its prevalence and associated risk factors have not been well understood yet. This retrospective case-cohort study was designed to investigate risk factors for postoperative DVT using retrospectively collected data from department of spine surgery between 07/2013 and 07/2014. Univariate analysis and binary logistic regression analysis were used to determine risk factors for DVT. A total of 861 patients were admitted into DVT-associated analyses, including 410 males and 451 females, aged from 15 to 87 years old (median 54, IQR 18). Of them, 147 cases (17%) sustained postoperative DVT. DVT incidence was 15.9% in patients undergoing lumbar interbody fusion, 13.5% in patients treated by low-molecular-weight heparin (LMWH), while only 8.1% in patients without LMWH. However, it revealed no significant difference between LMWH group and non-LMWH group (χ2 = 1.933, p = 0.164). Logistic regression equation was logit P = −4.09 + 0.05*X1 − 0.55*X2 + 0.41*X3 + 1.41*X7, (X1 = age; X2 = regions; X3 = hypertension; X7 = D-dimer). In this study, LMWH prophylaxis after spine surgery proved ineffective. Advanced age, D-dimer and hypertension have proved to be the risk factors for postoperative DVT in patients undergoing spine surgery. [ABSTRACT FROM AUTHOR]