Deep Vein Thrombosis (DVT)

The purpose of this study is to collect data on blood circulation using a multi-frequency impedance plethysmography device developed in the ThrombUS+ project. Impedance plethysmography (IPG) is a non-invasive method that measures changes in blood volume using electrodes placed on the skin. The collected data will be used for device development, the improvement of diagnostic data analysis methods, and AI training. A total of 40 participants will be recruited for this study, with 20 healthy volunteers in Tampere University and 20 patients undergoing thrombolytic therapy for DVT at Tampere University Hospital.

Venous thromboembolism (VTE), including deep vein thrombosis and pulmonary embolism, is a common condition that is typically treated with blood thinners (anticoagulants). After completing at least 3 months of treatment for a first unprovoked or weakly provoked VTE, patients and clinicians must decide whether to stop anticoagulation or continue treatment for a longer period. Continuing anticoagulation reduces the risk of another blood clot but increases the risk of bleeding. Because both options involve important benefits and risks, this decision should reflect the patient's values and preferences. The DECIDE-VTE study will evaluate whether a patient decision aid can improve decision-making for patients facing this choice. The decision aid provides evidence-based information about the risks and benefits of continuing versus stopping anticoagulation and includes a values clarification exercise to help patients identify what matters most to them. This multicentre batched stepped-wedge cluster randomized trial will be conducted in 12 thrombosis clinics across Canada. Clinics will transition from usual care to implementation of the patient decision aid according to a randomized schedule. The primary outcome is decisional conflict immediately following the anticoagulation decision visit, measured using the Decisional Conflict Scale. Secondary outcomes include patient knowledge, treatment decisions, decisional regret, concordance with the chosen treatment strategy, recurrent venous thromboembolism, major bleeding, all-cause mortality, and implementation outcomes.

The primary objective of this clinical investigation is to evaluate the safety and effectiveness of the Cleaner Vac® Thrombectomy System for the treatment of thrombus in patients with lower extremity proximal deep vein thrombosis (DVT). This prospective, multi-center, open-label study will assess clinical outcomes, device performance, and procedural success in a single DVT study cohort.

The goal of this observational study is to learn about the risk factors and prediction of postoperative venous thromboembolism (VTE) in patients undergoing lung cancer surgery. The main question it aims to answer is: Which clinical, surgical, and laboratory factors are associated with the development of postoperative deep vein thrombosis (DVT) in lung cancer surgery patients, and can machine learning models accurately predict individual risk? Participants undergoing lung cancer surgery will be prospectively followed for 30 days after surgery. Perioperative clinical data, laboratory results, and imaging findings will be collected to identify VTE risk factors and to develop a predictive model.

The DVT-Cph RCT aims to investigate: 1. if progressive gait training in combination with standard care is superior to standard care on quality of life in patients with first time lower extremity deep venous thrombosis (clinical effectiveness part). 2. the association between progressive gait training and disease progression, late complications such as post throbotic syndrome, and severity of venous thromboembolism conditions in patients with first time lower extremity deep venous thrombosis (mechanistic part).

Venous thromboembolism (VTE) with its two clinical manifestations deep vein thrombosis (DVT) and pulmonary embolism (PE) is a life-threatening disease that is associated with considerable morbidity and mortality. The incidence of VTE increases with age and it - as the third most common cardiovascular disease after ischemic heart disease and stroke - represents an important public health problem in industrialized countries with several aspects in need to be addressed. VTEval Project includes three long-term prospective observational studies to evaluate and improve VTE diagnostics and management, treatment and outcome. The aims of the project include a systematic assessment of VTE, i.e. disease status (symptoms, clinical and subclinical aspects) and risk profiles (classic, psychosocial and environmental factors), using a system-oriented approach. VTEval collects three large prospective cohorts of patients with suspected and incident VTE consisting of individuals with a clinical suspicion of acute PE, individuals with a clinical suspicion of acute DVT, and individuals with incidental diagnosis of VTE). The standardized and harmonized data acquisition of the study establishes a sustainable resource for comprehensive research on VTE, thus providing the basis for both short- and long-term analysis.