Active clinical trials for "Embolism"

To establish a clinical registry of suspected cases of AFE. The existing registry will be migrated to a new platform,

The purpose of this study is to prospectively validate the first PUMCH model for acute PE severity and prognosis prediction based on multi-center data constructed in the pre-project period based on national population data, and to optimize the PUMCH model based on artificial intelligence clustering algorithm.

Venous thromboembolic disease is a clinical entity including pulmonary embolism (PE) and deep vein thrombosis (DVT). It is a chronic disease with 30% recurrence rate at 10 years. In patients with recurrent PE clinical suspicion, an objective and accurate diagnostic method/strategy is warranted to exclude or confirm a PE new episode diagnosis and to decide on treatment initiation. Recurrent PE diagnosis raises several issues related to the limitations of clinical scores, D-dimer testing, and diagnostic imaging used for a first episode diagnosis. Most importantly, residual obstruction on chest imaging reported in more than 50% of cases at 6 months can make it difficult to distinguish between an old and a new thrombosis in the absence of possible comparison with a previous imaging carried out under the same modalities. There are currently few recommendations about the diagnostic strategy for patients with a recurrent PE clinical suspicion and these recommendations are not very consistent due to the lack of a validated strategy. None of current guidelines have included imaging-detectable lower-limb DVT within the strategies despite a reported high prevalence of PE-associated DVT. In one study using venography, 82% (95% CI 76.5 - 86.9) of angiographically-proven PE patients had an associated proximal or distal deep vein thrombosis, of which 42% were asymptomatic. In another study using lower-limb venous ultrasound, a proximal or distal DVT was detected in 93% (95% CI 85-97) of patients with PE.

The study aim is to determine whether electrical impedance tomography (EIT) is equivalent in the detection of pulmomary emboli compared to Computed Tomographic Angiography (CTA). EIT is a non-invasive, non-ionizing functional imaging technique that can be performed at bedside. Electrical impedance tomography data will be collected on individuals undergoing a CTA scan of the chest at Medical Center of the Rockies (MCR). The primary outcome measure is to assess whether assessment by CTA corresponds with EIT in detection of pulmonary emboli. The study will include up to 63 participants. EIT data will be collected for up to 20 minutes during tidal breathing and for approximately five to ten seconds during breath-holding.

This study collected clinical, laboratory, and CT parameters of acute patients with acute pulmonary embolism from admission to predict adverse outcomes within 30 days after admission into hospital.

Introduction: The diagnosis of pulmonary embolism (PE) is a challenge in the Emergency Department. D-dimer based diagnostic algorithms for PE have a very high sensitivity, but rely upon a vast amount of CT angiography and potentially unnecessary exposure to radiation. An accurate diagnostic algorithm that does not involve d-dimer testing might reduce this burden. An abnormal Alveolar-arterial oxygen gradient (A-a gradient) seems to increase the chance of PE. However, a normal A-a gradient on its own does not exclude the diagnosis. In this paper, the accuracy of A-a gradient testing and a combination of Years criteria with A-a gradient testing will be assessed. Methods: This is a prospective, single center, observational study. All patients that present at our emergency department from September 2022 until September 2023 with a suspicion of pulmonary embolism will be analyzed for eligibility and included in the study after informed consent. The aim is to include at least 230 patients in the study. Analysis: The primary outcome is the diagnostic accuracy of a YEARS and A-a gradient based algorithm for pulmonary embolism. The secondary outcome is the potential decrease in performed imaging in order to exclude pulmonary embolism. Valorisation An accurate A-a gradient-based algorithm for pulmonary embolism in low risk patients will be a step towards an improved clinical risk score. We aim to reduce the amount of diagnostic imaging, i.e. CT-angiography. Meaning less, potentially unnecessary, exposure to radiation for the patient. Furthermore, it could lower healthcare costs by reducing expensive diagnostic imaging.

This is a multi-center prospective cohort study of patients with first-episode deep venous thrombosis and pulmonary embolism.

The purpose of this study is to analyze the clinical manifestations, imaging features, and prognosis-related factors of pulmonary embolism, and to explore the prognosis risk assessment model for Chinese patients

Migration of a thrombus in the pulmonary circulation is the leading cause of pulmonary embolism (PE). It can be prevented mechanically by implanting a vena cava filter (VCF) in the inferior vena cava. The implation of a VCF is indicated for patients with acute PE and a contraindication to anticoagulation, with an acute deep vein thrombosis (DVT) without PE and a contraindication to anticoagulation or with acute venous thromboembolism (less than 3 months) in whom an interventional gesture at hemorrhagic and thromboembolic risk contraindicates anticoagulation. The purpose of this study is to describe the rates of implantation, removal and complications associated with the use of the optional ALN OATF VCF in current practice.

Pulmonary embolism is a frequent and recurrent pathology, especially in the elderly. It is often preventable, with high mortality and morbidity, making it a major public health issue. The clinical presentation of pulmonary embolism is non-specific and very highly variable, ranging from asymptomatic thrombus diagnosed incidentally to sudden death. The current diagnosis of pulmonary embolism is based on several diagnostic techniques, mainly non-invasive, which should be used sequentially. We propose to sample the volatile organic compounds using a device that allows them to be trapped on polymer cartridges. Sampling will be performed under monitoring of respiratory pressure and a capnograph to collect alveolar and upper respiratory tract air separately without contamination of the oral cavity or sinuses. This exploratory metabolic analysis will be non-targeted (analysis of all molecules detectable without a priori). The main objective of the study is to identify specific metabolic profiles to predict the results of ventilation-perfusion pulmonary tomoscintigraphy in subjects undergoing this examination for suspected acute pulmonary embolism. Secondary purposes : To identify metabolic profiles to be used to predict, in combination with clinical probability scores, the results of ventilation-perfusion pulmonary tomoscintigraphy in subjects undergoing this examination for suspected acute pulmonary embolism.; To correlate metabolic profiles with the topography of embolized lung territories