Active clinical trials for "Thrombosis"

The investigators aim to build a predictive tool for Adverse Outcome of Acute Pulmonary Embolism by Artificial Intelligence System Based on CT Pulmonary Angiography.

If your serious vaccine-induced adverse event has been entered in the CDC Vaccine Adverse Event Reporting System (VAERS) we are interested in enrolling you for this study in order to log your symptoms. The primary goal of this study is to create a national database and gather vaccine-associated serious adverse events/injury data from newly vaccinated individuals in the US in order to identify the possible underlying causal relationships and plausible underlying biological mechanisms. The project aims to identify the genetic determinants of vaccine-induced adverse response by studying host genetics. We plan to use whole genome sequencing to identify single nucleotide polymorphisms associated with cardiovascular, neurological, gastrointestinal, musculoskeletal and immunological symptoms induced by vaccine administration. The secondary goal is to establish criteria that enable classification of vaccine-induced adverse events/injuries compare data from our database with the official Vaccine Injury Table National Vaccine Injury Compensation Program on or after March 21, 2017. The tertiary goal is to establish a database to gather detailed long-term adverse reaction data from subjects enrolled in FDA Emergency Use Authorized vaccine clinical trials.

As the occurrence of thrombosis in post surgery is rare, it seemed difficult to study only this one. This is why we decided to test the bioimpedance, temperature and green, red and infrared light absorption measurements of the prototype during the weaning of the flap during surgery. Indeed, during weaning the investigators voluntarily interrupt the arterial and venous flow to transfer the flap to the breast. This weaning corresponds to a thrombosis model. The patients will benefit from an "improved" postoperative monitoring. Indeed, in addition to the classical clinical monitoring, they will benefit from an additional monitoring during 5 days thanks to the realization of an ultrasound of the flap which will be carried out every 6 hours the first 24 hours then every 12 hours. This protocol is therefore a feasibility study for the collection of data of interest.

Post-thrombotic syndrome (PTS) is the most frequently observed chronic complication of deep vein thrombosis (DVT), with an estimated cumulative incidence of 20-50%. Endovascular venous recanalization with angioplasty and stenting of obstructive lesions is the recommended treatment option to reduce or correct the symptoms of DVT. However, its impact on the physical capacity and breathlessness of patients has not been fully demonstrated. The heterogeneous evidences of clinical improvement is probably related to the presence or absence of collateral veins developed in these patients with proximal venous obstruction (iliac or iliofemoral with or without inferior vena cava involvement), which ensure the cardiac venous return. The aim of this study is to compare changes in maximal oxygen uptake after endovascular venous recanalization in DVT patients and to evaluate the hemodynamic, respiratory and muscular improvement induced by the restoration of venous flow in the occluded segments.

This study is the first to compare the efficacy and safety of recombinant human adenovirus type 5 injection via hepatic artery infusion combined with TACE-based combination therapy for the treatment of patients with stage IIIa primary hepatocellular carcinoma with portal vein carcinoma thrombosis, providing a safe and reliable treatment method for the clinical treatment of this group of patients, and also providing a reference and basis for the treatment of other tumors with this new treatment model.

Chronic Obstructive Pulmonary Disease (COPD) is a common respiratory system disease characterized by persistent respiratory symptoms and irreversible airflow restriction, which seriously endangers people's health. Acute exacerbation of chronic obstructive pulmonary disease (AECOPD) refers to individuals who experience continuous deterioration beyond their daily condition and need to change their routine medication. AECOPD is usually caused by viruses and bacteria, and patients require hospitalization, which brings a huge economic burden to society. AECOPD patients often have limited activities. Because long-term chronic hypoxia causes venous blood stasis, siltation causes secondary red blood cell increase, and blood hypercoagulability, AECOPD patients have a high risk of pulmonary embolism (PE). Pulmonary Thrombo Embolism (PTE) refers to a disease caused by blockage of the pulmonary artery or its branches caused by a thrombus from the venous system or right heart. AECOPD patients experience elevated hemoglobin levels and increased blood viscosity due to long-term hypoxia. At the same time, such patients have decreased activity, venous congestion, and are prone to thrombosis. After the thrombus falls off, it can travel up the vein, causing PTE to occur in the right heart PTE is often secondary to low deep vein thrombosis (DVT). About 70% of patients were diagnosed as deep vein thrombosis in lower limb color ultrasound examination. SteinPD conducted a survey on COPD patients and general patients from multiple hospitals. The results showed that by comparing adult COPD patients with non COPD patients, the relative risk of DVT was 1.30, providing evidence for AECOPD being more likely to combine with PTE AECOPD patients with PTE have similarities in their clinical manifestations. It is difficult to distinguish between the two based solely on symptoms, such as cough, increased sputum production, increased shortness of breath, and difficulty breathing. They lack specificity and are difficult to distinguish between the two based solely on symptoms, which can easily lead to missed diagnosis. CT pulmonary angiography (CTPA) is the gold standard for the diagnosis of PTE, but due to the high cost of testing and high equipment prices, its popularity in grassroots hospitals is not high. Therefore, analyzing the risk factors of AECOPD patients complicated with PTE is of great significance for early identification of PTE. At present, although there are reports on the risk factors for concurrent PTE in AECOPD patients, there is no specific predictive model for predicting PTE in AECOPD patients. In clinical practice, risk assessment tools such as the Caprini risk assessment model and the modified Geneva scale are commonly used for VTE, while the Wells score is the PTE diagnostic likelihood score. The evaluation indicators of these tools are mostly clinical symptoms, and laboratory indicators are less involved, It is difficult to comprehensively reflect the patient's condition, so the specificity of AECOPD patients with PTE is not strong. The column chart model established in this study presents a visual prediction model, which is convenient for clinical use and has positive help for the early detection of AECOPD patients with PTE. In addition, medical staff can present the calculation results of the column chart model to patients, making it easier for patients to understand. It helps improve the early identification and treatment of AECOPD combined with PTE patients, thereby improving prognosis.

The thrombin generation test is a global test for the study of coagulation that allows the fine study of the balance between procoagulant and anticoagulant factors. For many years, it has been performed in laboratories by semi-automated techniques, sometimes using in-house reagents, which led to a high variability and did not allow multicenter studies. Recently, an automated device for the evaluation of thrombin generation has been placed on the market (ST-Genesia), allowing a better standardization of the technique. In order to allow multicenter studies, which are essential for the routine positioning of the thrombin generation test, the inter-center variability must be evaluated, as a priority, in the pathologies for which the test is routinely positioned. Thrombin generation (TG) assays are long-established research tools in hemostasis. They are used for both fundamental and clinical research, but a multiplicity of test methodologies limits the large adoption of TG due to the variability of results despite the attempts to standardize practices. Several publications already exist to evaluate its analytical performances, and thereby demonstrate that the test automation also allows its democratization to reach acceptable performances It also enables the evaluation of the device in various indications such as, for example, the evaluation of the effect of direct oral anticoagulants or the evaluation of the risk of breast cancer recurrence. The confirmation of these anterior results allows further clinical investigations in larger cohorts. However, the absence of interchangeability between the two systems indicates that the results will need to be more rugged through multicenter studies on ST Genesia.

Portal vein thrombosis is defined as partial or complete occlusion of the portal vein lumen by the blood clot or its replacement by multiple collateral vessels with the hepato-petal flow, known as 'portal cavernoma'. [1,2] Based on the published literature, 15-25% of patients with cirrhosis have portal vein thrombosis (PVT) [3], and 35-50% of patients with hepatocellular carcinoma (HCC) have malignant PVT [4] compared to 1-3.8 per 100,000 patients in the general population. [5] The reported cumulative incidence of PVT in patients of Child-Pugh A and B is 4.6% and 10.7% at 1 and 5 years respectively with higher incidence among those with decompensated disease or with an underlying hypercoagulable disorder. [6]. Similarly, the prevalence of PVT in compensated cirrhosis is around 1% which increases to 8 - 25% in liver transplant (LT) candidates and 40% in patients with hepatocellular carcinoma (HCC) [7,8]. Based on the published literature 7-9 % of all chronic liver disease patients have hepatic vein outflow tract obstruction (HVOTO) in the Indian population. [9] HVOTO is defined as obstruction to hepatic venous outflow at any site from the right atrium inlet to the small hepatic venules. The Budd-Chiari syndrome (BCS) results from occlusion of one or more hepatic veins (HV) and/or the inferior vena cava (IVC). In the West, the most common cause is HV occlusion by thrombosis. More recent Indian studies have however shown that isolated HV and combined IVC+HV obstruction are now more common. [10] In the post COVID-19 era, there has been great interest in the prothrombotic states associated with the SARS-Cov-2 virus infection, and the adverse effects of some vaccines. [11] With the availability of better molecular tests for hypercoagulable states, use of global coagulation tests (GCT) like rotational thromboelastometry (ROTEM), thromboelastography (TEG) and Sonoclot, use of therapeutic procedures like Transjugular intrahepatic portosystemic shunt (TIPS), availability of novel oral anticoagulants (NOAC), the natural course of disease can be changed with good outcomes. [12] Standard Coagulation tests (SCTs) like PT, aPTT, and platelet count are not predictive of bleeding or coagulation risk as they exclude the cellular elements of hemostasis and are unable to assess the effect of thrombomodulin and cannot assess the stage of the coagulation pathway which is affected. Global coagulation tests provide dynamic information on the coagulation pathway that is not available from conventional tests. [13]

The study is aimed at assessing the role of the activity of high-risk markers of thrombotic events (MCP-1, MIP1α, IP-10, phosphatedylserine, calreticulin) on the development of thrombotic complications in patients with COVID -19.

Whilst deep vein thrombosis (DVT) is common following traumatic brain injury (TBI), optimal timing and safety of pharmacological prophylaxis is uncertain. Paradoxically the harm associated with the occurrence of is also unclear. This study is an observational pilot that aims to define the incidence of proximal DVT in patients with moderate to severe TBI. It seeks prospectively to determine if there is an association between DVT and outcome. It also seeks to explore possible associations between the occurrence of DVT and the incidence of lung injury and/or ventilator associated pneumonia.