View clinical trials related to Thromboembolism.
Filter by:The aim of this study is to verify if patients admitted to hospital in a medical division and in the intensive care unit for a COVID-19 infection are at higher risk of developing a VTE complication and if they actually present an increased hypercoagulable state.
This is a pilot study to determine the safety and efficacy of low dose aspirin for the prevention of venous thromboembolism among women with advanced ovarian cancer receiving neoadjuvant chemotherapy.
Background: Venous thromboembolism (VTE) includes the abnormal clotting of blood in a deep vein of the upper or lower limbs (deep vein thrombosis) that may travel to and block a blood vessel in the lung (pulmonary embolism). Some people with sickle cell disease (SCD)-a red blood cell disorder-seem to be at greater risk for developing these blood clots. Researchers want to study the blood of people with SCD and VTE as well as healthy people to develop better treatments to prevent blood clots. Objective: To study blood clotting in SCD because it is the most common cause of vascular death after a heart attack or stroke. Eligibility: People ages 18-80 who have SCD (with or without a history of blood clots) or the trait for SCD, and healthy volunteers Design: Participants will be screened with medical history, physical exam, and medical records review. They will give blood samples. Participants will have phone calls either every 3 months or once a year, for 2 years. They will give updates on their health. They may give additional medical records. The phone calls may last up to 30 minutes. If participants have a VTE or pain crisis episode, they may visit the Clinical Center. These visits may last up to 4 hours. They will repeat the screening tests and give blood samples. Some participants may be invited to take part in blood studies. After 2 years, some participants will have a follow-up visit at the Clinical Center. Participation will last for about 2 years.
Patients with COVID-19 in the Intensive Care Unit (ICU) or hospitalized with severe form have a poor prognosis (almost 30% rate of death). They present often a high cardiovascular risk profile (almost 30% of hypertension and 19% of diabetes). Troponin has been described to be elevated in a high proportion of patients (one fifth of all patients and 50% of non-survivors) suggesting the possibility of cardiomyopathies. High levels of DDimers (81% of non survivors) and fibrin degradation products are also associated with increased risk of mortality suggesting also the possibility of venous thromboembolism. Therefore, screening for cardiomyopathies and venous thromboembolism could represent an important challenge for patients with COVID-19 management.
The standard or usual treatment for patients diagnosed with deep vein thrombosis or pulmonary embolism is treatment with blood thinners (called anticoagulants). While treatment of blood clots with blood thinners is effective, some research has shown that adding a statin (medication used to lower cholesterol) may give extra protection. It is thought that statins can improve how cells along the walls of the vein control inflammation, which can prevent new blood clots from forming. The medication in this study, rosuvastatin, is approved in Canada for use as a cholesterol-lowering medication. The use of rosuvastatin in this study is considered investigational. This means that Health Canada has not approved the use of rosuvastatin as a treatment for blood clots. However, it has been approved for use in this research study. The purpose of this study is to examine if adding a statin (rosuvastatin) to the usual blood thinner treatment will decrease the risk of another blood clot forming. The investigators also hope to discover if taking a statin reduces damage to your veins. To do this, some of the participants in this study will get rosuvastatin and others will receive a placebo (a substance that looks like the study rosuvastatin but does not have any active or medicinal ingredients). The placebo in this study is not intended to have any effect on your blood clot. A placebo is used to make the results of the study more reliable.
The aim of this study is to evaluate the efficacy of two dosing regimens of low molecular weight heparin (LMWH) to reach prophylactic anti-factor Xa levels in post-cesarean delivery women. Half of participants will receive a fixed dose of LMWH, while the other half will receive a weight-based dose. The hypothesis is that the use of a weight-based dose will result in more women reaching prophylactic levels.
Venous thromboembolism (VTE) can be the earliest sign of cancer. Identifying occult cancers at the time of VTE diagnosis may lead to significant improvement of patients' care. This is also an upmost issue for patients who want to know if an underlying cancer might have triggered the VTE. An individual patient-level data meta-analysis (IPDMA) supports extensive screening strategies for occult cancer especially based on FDG PET/CT, and suggests that the best target population for cancer screening would be patients with unprovoked VTE older than 50 years of age (6.7% in patients aged 50 years or more vs. 1.0% in patients of less than 50 years (OR: 7.1, 95% CI: 3.1 to 16%).
The main venous thromboembolism (VTE) risk prediction model for ambulatory cancer patients is Khorana. Cancer thrombosis is associated with elevated thrombin generation. Its quantification is a promising method for evaluating patient's thrombotic profile. This study aims to develop a predictive model of VTE risk in ambulatory cancer patients, combining thrombosis biomarkers (D-dimers and thrombin generation potential) with the Khorana score. This is a prospective observational study that includes newly diagnosed cancer patients proposed for anti-tumor treatment (chemotherapy, immunotherapy or targeted therapies). Patients with disease progression are allowed if chemotherapy-free for 3 months. A 6-month mean incidence of VTE 6-10% is expected, requiring a sample size of 600 patients. Blood sample is collected at inclusion to analyze thrombosis biomarkers and blood count. The primary endpoint is the occurrence of symptomatic or incidental VTE within 6 months of inclusion. Models will follow a logistic approach with K-fold cross-validation (k=10). Model quality will be assessed with Akaike Information Criterion (AIC) and Bayesian Information Criterion (BIC). Decision for entering predictors in multivariate models will be based on p <.10 in the univariate analysis.
This research study is attempting to answer the question of whether 81 mg aspirin once daily is as effective as 81 mg aspirin twice daily in preventing blood clots after total joint replacement surgery.
Venous Thromboembolic Events (ETVs) are the second leading cause of death (9.2% of causes of death) in cancer patients after tumor progression (1). Indeed, cancer is associated with a 4 to 7-fold risk of ETV during chemotherapy (2). This complication is observed in 20% of cancer patients (3), and is sometimes an inaugural manifestation of cancer. This risk is particularly increased during the first 3 months after cancer diagnosis (4). A biomarker correlated with the occurrence of ETVs would make it possible to target patients at high risk of thrombosis who could benefit from primary thromboprophylaxis, thus avoiding the complications, particularly haemorrhagic, and the additional costs associated with the long-term diagnostic and therapeutic management of ETVs. The investigator has implemented in the laboratory an innovative approach to the detection and quantification of circulating NETs by flow cytometry (FCM) allowing the routine determination of NETs. Therefore the investigator propose to assess NETs by CMF in a cohort of cancer patients with a very high risk of ETVs (pancreatic cancer, gastric cancer and colon cancer).