View clinical trials related to Embolism.
Filter by:It is important to diagnose pulmonary embolism in a timely manner to prevent death and long-term disability. More than half a million people (4-5% of emergency department patients) are tested for pulmonary embolism, although positive results are low. Imaging for PE testing exposes patients to radiation, is expensive, adds time to the emergency visit, and can lead to a false positive diagnoses. Existing protocols aimed at reducing unnecessary pulmonary embolism imaging are complex and seldom used by emergency physicians. Too many patients undergo unnecessary pulmonary embolism imaging. We have created a new tool (called Adjust-Unlikely) which could safely reduce pulmonary embolism imaging in Canada. Our research group composed of researchers, emergency physicians, and patients developed the Adjust-Unlikely clinical decision rule: a rule which has been customized for emergency physicians and emergency patients. Adjust-Unlikely is highly sensitive at the bedside, meaning there are very few false negative results. Our study aim is to prospectively validate Adjust-Unlikely pulmonary embolism testing in emergency patients with suspected pulmonary embolism.
This study is a quality improvement project to evaluate health care management of pulmonary embolism (PE) patients. The researchers are testing an intervention to determine if it prevents unnecessary hospital admissions.
SONIC-PE is a multicenter, prospective, single-arm study of 10 patients with bilateral PE treated with ultrasound-facilitated, catheter-directed lower-dose fibrinolysis (total dose 8 mg tPA given as 2 mg/hour/catheter over 2 hours) followed by 50 patients (total dose 6 mg tPA given as 3 mg/hour/catheter given over 1 hour) with the EKOS+™ system to determine its impact on the change in RV-to-LV diameter, refined Modified Miller Score, and distal pulmonary vascular blood volume as well as to assess International Society on Thrombosis and Haemostasis (ISTH) major bleeding.
Calcified cerebral embolism (CCE) is a relatively rare but underdiagnosed cause of infarction. CCE diagnosis is made by CT. Radiological characteristics of CCE have been reported in small case series. The aim of this study was to describe clinical and radiological characteristics of CCE in a large number of patients, and to compare patients with different radiological CCE characteristics.
The purpose of this study is to identify and validate new imaging biomarkers allowing an individual phenotyping of patient with venous thrombo-embolism (VTE), mainly in terms of recurrence risk assessment and to distinguish provoked from unprovoked VTE. To do so, the investigators will create a retrospective imaging database including multiple imaging modalities, performed at diagnosis of the VTE.
This study was conducted to investigate whether the use of tourniquet after delivery of the fetus could reduce the amount of amniotic fluid entering the bloodstream and thus reduce the incidence of intraoperative adverse events.
Lung perfusion scintigraphy with 99mTc-MAA and ventilation scintigraphy with Technegas (V/Q SPECT/CT) has been the cornerstone for the detection of pulmonary embolisms (PE) for many decades. In last two decades after the introduction of pulmonary CTA, general PE detection has shifted towards CTA and V/Q SPECT/CT has become the modality of choice for specific patient populations (iodine contrast allergy, poor kidney function, pregnancy, etc.) or indications (pre-operative risk stratification, chronic embolism detection, pulmonary hypertension). V/Q SPECT/CT acquisition is performed on a gamma camera, but this technique has distinct challenges and/or disadvantages. A potential alternative is the nowadays broadly available. 68Ga as a positron emitter allows PET/CT imaging. Replacing 99mTc with 68Ga in both MAA and aerosol suspension is easy and requires no modifications. However, 68Ga-V/Q with PET/CT will resolve many of the disadvantages of V/Q SPECT/CT. International studies have proven safety and feasibility of replacing 99mTc with 68Ga and preliminary work by international colleagues and our institute have shown validated preparations of the radiopharmaceuticals. However, in our institution, clinical translation is hampered by lack of data on technical acquisition parameters for our scanners. The aim of this small study is to get more insights into technical parameters for image acquisition, logistical feasibility of V/Q PET/CT, and confirm preliminary non-inferiority of this new technique over the current clinical standard (V/Q SPECT/CT).
Pulmonary embolism (PE) remains a high mortality and morbidity disease state. We have previously shown that use of a Pulmonary Embolism Response Team (PERT) can improve overall readmission, bleeding, and mortality outcomes. Unfortunately, PERT may still be underutilized from a national standpoint and may not be readily available in underserved areas. The utility of the current study is to investigate the implementation of an artificial intelligence (AI) program to differentiate patients at the highest risk of the PE spectrum to help efficiently identify those most appropriate for aggressive management. Furthermore, we will investigate the utility of an algorithm-driven protocol for activation of invasive interventions versus traditional PERT discussion and evaluate overall patient outcomes.
A new algorithm derived from only patient age and components of the complete blood count and basic metabolic panel can identify patients discharged from the hospital who may benefit from a blood thinner (called rivaroxaban) to decrease their risk of blood clots, and for whom the risk of bleeding is minimal. The purpose of this study is to evaluate the use of a pop-up alert, which will be seen by clinicians when a discharging patient has been identified as being someone for whom the risk of blood clots is high, but for whom bleeding risk is estimated to be low. The pop-up alert will be enabled in a sequential fashion for each group of hospitals in 1 month blocks. We will look to see if the pop-up alert changes the number of patients who receive rivaroxaban. We will also measure the outcomes of blood clots and bleeding among all discharging patients.
The investigators aimed to compare the image quality and diagnostic performance of DECTPA using lower concentration iodine contrast materials and using normal concentration iodine contrast materials in the evaluation of suspected pulmonary embolism.