Clinical Research Directory

Repeated Examinations for Typing Pulmonary Embolism

PURPOSE The two related purposes of the RE-TyPE study are: 1. To improve understanding of the early clinical course of intermediate-high risk pulmonary embolism and its association with outcome and 2. To establish a platform for longitudinal follow-up for all pulmonary embolism at Sahlgrenska University Hospital HYPOTHESES 1. The dynamic pattern of change, evaluated thorough repeated measures of biomarkers, electrocardiography and echocardiography during the first 48 hours after pulmonary embolism, better predicts outcome than static measurements currently used to predict outcome 2. Establishment of a platform for longitudinal follow-up will improve quality of care and outcome for patients with pulmonary embolism at Sahlgrenska University Hospital

Hemodynamic and Respiratory Instability During Percutaneous Pulmonary Thrombectomy

Pulmonary embolism (PE) is a potentially life-threatening condition caused by the obstruction of pulmonary arteries by thrombi. Patients with high-risk or intermediate-high-risk PE may require immediate reperfusion therapies, including percutaneous pulmonary thrombectomy. However, this procedure can be associated with significant hemodynamic and respiratory instability, potentially leading to shock, cardiac arrest, or the need for advanced support such as mechanical ventilation or extracorporeal membrane oxygenation (ECMO). The mechanisms, timing, and causes of intraprocedural hemodynamic and respiratory deterioration during pulmonary thrombectomy are not well established. Factors such as catheter manipulation within the pulmonary arteries, increased pulmonary pressures, and the effects of anesthesia and mechanical ventilation may contribute to clinical instability. In addition, biomarkers such as NT-proBNP may reflect right ventricular strain and could help predict the risk of instability during the procedure. The aim of this prospective observational study is to determine the incidence, causes, and timing of hemodynamic and/or respiratory instability during percutaneous pulmonary thrombectomy in patients with high-risk or intermediate-high-risk PE. The study will also compare the occurrence of instability between different thrombectomy devices (FlowTriever® and Indigo® systems) and evaluate the prognostic role of baseline NT-proBNP levels. Secondary objectives include the assessment of in-hospital and 30-day mortality and their underlying causes. This study will include adult patients undergoing percutaneous pulmonary thrombectomy as part of routine clinical care. The results of this study may help improve risk stratification, guide procedural planning, and optimize the management of patients undergoing pulmonary thrombectomy, ultimately aiming to reduce morbidity and mortality.

Acute Pulmonary Embolism Treatment With the AlphaVac Multipurpose Mechanical Aspiration System and the AlphaReturn Blood Management System: Evaluation of Safety and Effectiveness

The investigation is intended to evaluate the safety and effectiveness of the AlphaReturn Blood Management System when used in conjunction with the cleared AlphaVac MMA F1885 System for the treatment of acute pulmonary embolism.

Optimal Time for Reperfusion in Acute Pulmonary Embolism

Pulmonary embolism (PE) is the third leading cause of cardiovascular mortality worldwide. Current guidelines recommend early reperfusion for high-risk and intermediate-high-risk PE, yet systemic thrombolysis and percutaneous therapies are frequently underutilized, and no specific timing for reperfusion is defined, unlike in acute myocardial infarction or ischemic stroke. As most PE-related in-hospital deaths occur within the first hours and thrombus composition changes over time, defining an optimal reperfusion time window may improve survival and prevent hemodynamic deterioration. We therefore propose a national, multicenter, prospective observational study to evaluate the prognostic impact of reperfusion timing, using systemic thrombolysis or catheter-directed therapies, on in-hospital mortality and haemorrhagic or cardiovascular complications.

Interest of the Chair Lift Test in the Prognostic Evaluation of Pulmonary Embolism: a Single-center Open Prospective Study

The objective of the study is to evaluate the prognostic performance of the chair lift test in the initial assessment of the severity of non-severe pulmonary embolism in hospitalized patients, in comparison with the current pulmonary embolism risk stratification score using the sPESI score refined by the use of cardiac biomarkers and right ventricular dysfunction

Safety and Effectiveness of the Akura Thrombectomy System for Use in the Removal of Emboli From the Pulmonary Arteries in Treating Acute Pulmonary Embolism (PE)

This study is a prospective, single-arm, interventional, multicenter study to evaluate the safety and effectiveness of percutaneous mechanical thrombectomy using the Akura Thrombectomy System in subjects with acute pulmonary embolism (PE).

Safety and Effectiveness of the ATC System in the Treatment of Acute PE

This study is a prospective, single-arm, interventional, multicenter study to evaluate the safety and effectiveness of the ATC System in subjects with acute pulmonary embolism (PE).

Safety and Effectiveness of the Akura Thrombectomy System in the Treatment of Acute Pulmonary Embolism

This study is a prospective, single-arm, non-randomized, interventional, multicenter feasibility study to evaluate the safety and effectiveness of percutaneous mechanical thrombectomy using the Akura Thrombectomy System in subjects with acute pulmonary embolism (PE).

Cohort Study on Treatment Comes of Catheter-based Therapy in Patients With Acute Pulmonary Embolism in Hong Kong

This retrospective cohort study (Hong Kong PECT Registry) compares treatment outcomes between different percutaneous catheter-based therapies in patients with acute pulmonary embolism (PE). PE is a critical condition with potential for rapid deterioration and mortality before treatment. While availability of catheter-based therapy contributed to the declining mortality rates of PE, selecting the appropriate intervention remains key. There are primarily two modes of therapies available: Catheter-directed thrombolysis and Aspiration thrombectomy (e.g., Penumbra, Flowtriever, AlphaVac) Given limited direct comparisons between these methods, the study will evaluate their efficacy, safety, and clinical outcomes of these treatment strategies in acute PE patients.

Registry of Catheter Intervention in Pulmonary Embolism

Multicenter longitudinal observational ambispective (retrospective cases from 2014 and prospective from 2018 onwards) cohort study. The registry recruits a series of consecutive patients admitted for moderate-high risk or high-risk pulmonary embolism (according to 2019 European Society of Cardiology guidelines) treated invasively. This study aims to describe the acute management of the safety and effectiveness of different percutaneous interventions for acute pulmonary embolism.

'Thrombectomy in High-Risk Pulmonary Embolism - Device Versus Thrombolysis Netherlands': TORPEDO-NL

TORPEDO-NL will be an investigator-initiated, academically sponsored, multicentre, open-label, randomized controlled trial (RCT). Patients with high-risk pulmonary embolism (PE) require immediate reperfusion therapy on top of anticoagulation. The standard reperfusion treatment in these patients is full-dose systemic thrombolysis. This carries a significant risk of major bleeding (10-25%) and intracranial haemorrhage (ICH, 3%). Catheter-directed thrombectomy (CDT) is a promising alternative to systemic thrombolysis with a more direct effect on reducing pulmonary artery clot burden and very likely a better safety profile. Randomized trials evaluating the safety and efficacy of CDT in high-risk patients are currently unavailable. The investigators hypothesize that in high-risk PE patients, CDT is superior to the current standard of systemic thrombolysis in terms of mortality and adverse events, i.e., is associated with a lower composite incidence of all-cause mortality, treatment failure, major bleeding and all-cause stroke. The investigators also hypothesize that CDT will lead to a shorter length of stay (LOS) at the intensive care unit (ICU) and in-hospital, faster recovery, and better long-term quality of life (QoL). Objective: To determine whether CDT in high-risk PE relative to systemic thrombolysis is: * more effective and safer in terms of a reduction of the composite endpoint on all-cause mortality and adverse events defined as treatment failure, major bleeding and all-cause stroke at day 30 (primary outcome) * leads to a better Desirability of Outcome Ranking (DOOR) at day 7 * associated with a lower level of oxygen supplementation at 48 hours * associated with shorter length of stay (LOS) at the intensive care unit (ICU) and in the hospital * associated with better functional recovery as well as better patient-reported outcomes such as QoL at one year * cost-effective after a time horizon of one year

Evaluation of the Standard Catheter-directed Thrombolysis Effectiveness in Intermediate-High-Risk Pulmonary Embolism Patients

A single-center, open-label, randomized comparative study of two treatment strategies in patients with intermediate-high-risk acute pulmonary embolism (PE). Patients will be randomized in a 1:1 ratio to standard anticoagulant therapy or standard catheter-directed thrombolysis (SСDT) with a low dose of alteplase, followed by evaluation of short- and long-term efficacy and safety in each group