Active clinical trials for "Aortic Aneurysm, Abdominal"

Ruptured thoracoabdominal aortic aneurysm (TAAA) represents an emergency medical challenge that needs to be treated promptly. Over the past years different endovascular techniques have emerged such as fenestrated or branched endovascular aortic repair (FB-EVAR). However, FB-EVAR is a technique that uses a custom-made device which needs to be manufactured and this process take months, therefore, it could not be used in urgent settings. Off-the-shelf graft stents are pre-made graft stents, which can be used in urgent cases. A retrospective, multicenter cohort study was planned to include patients who underwent endovascular procedures between January 2015 and January 2022 (85 months) to evaluate the technical and survival outcomes of the use of off-the-shelf stent graft, physician-modified endograft and parallel graft technique in endovascular aortic repair of free and contained ruptured TAAA. Data will be collected anonymously and retrospectively, including patient demographics, risk factors, diagnosis and anatomical details, procedure details and post-operative outcomes.

The present study will investigate the effect of artificially stiffening the aorta by means of an aortic stent on central aortic haemodynamics (CAH). This study will determine whether aortic stenting inadvertently adversely impacts on CAH, thereby providing the rational for subsequent therapeutic intervention to reduce the associated cardiovascular risk.

The LUCY Study is a prospective, consecutively enrolling, non-randomized multi center post-market registry to evaluate the low profile Ovation ® Abdominal Stent Graft Platform when used in the endovascular treatment of female patients.

The purpose of this study is to determine the prevalence and risk factors, at the time of the diagnosis of PAD, for asymptomatic carotid stenosis and abdominal aortic aneurysm.

The purpose of ENGAGE is to prospectively collect global 'real world' data on the Endurant Stent Graft System from AAA subjects.

The purpose of this study is to better understand the role of inflammation in the pathophysiology of abdominal aortic aneurysm. In this study we hope to show better ways of predicting risk in this condition by using a combination of FDG-PET with CT.

The objective of this study will be to answer a clinical question that has not already been investigated; that is, what are the effects of aortic infra-renal clamping and unclamping on intraocular pressure during Abdominal Aortic Aneurysm (AAA) repair? Depending on the results, this study may raise or alleviate concern that vascular surgery for abdominal aortic aneurysm could contribute to early perioperative exacerbation of pre-existing eye disease and increase a patient's vulnerability to developing a type of blindness known as ischemic optic neuropathy. The purpose of this observational study is to evaluate whether intraocular pressure measurements with a handheld tonometer will detect changes in intraocular pressure related to intraoperative events during aortic cross clamping and unclamping that may provide information on causes of perioperative blindness.

An increasing incidence of abdominal aortic aneurysms (AAA) is observed in our ageing population. Since it is less invasive, endovascular repair (EVAR) by stent-graft (SG) insertion is frequently indicated in patients with intermediate and high-operative risk. Patient selection and stent planning for EVAR is done on CT-scans based on specific anatomic criteria. SG are inserted in the catheterization laboratory under digital substraction angiography (DSA) and fluoroscopic guidance. With this technology, no soft-tissue differentiation is available during the intervention and important information are lacking such as thrombus and aneurysm extension close to proximal and distal landing zones. Our team has recently patented a software allowing the extraction of the AAA (lumen and thrombus) from pre-operative CT-scanner. In collaboration with Siemens medical, the investigators have integrated this technology to the Siemens workstation in the catheterization laboratory. The investigators can now import the aortic lumen and thrombus meshes segmented from pre-operative CT-scans and perform a rigid registration with fluoroscopy and DSA data to enhance visualization of soft tissue during EVAR. Our preliminary results are encouraging in terms of feasibility and visualization. However, the delivery device of the SG and the guidewire used during the intervention are stiff and induce a deformation of aortic lumen and thrombus. This deformation impairs the accuracy of rigid registration. The investigators propose to improve registration accuracy by implementing an elastic deformation of aortic lumen and wall based on the segmentation of endovascular devices (delivery device, guidewires and catheters) inserted during the procedure and by biomechanical modeling.

Major vascular surgery involves operations to repair swollen blood vessels, clear debris from blocked arteries or bypass blocked blood vessels. Patients with these problems are a high-risk surgical group as they have generalized blood vessel disease. These puts them at risk of major complications around the time of surgery such as heart attacks , strokes and death. The mortality following repair of a swollen main artery in the abdomen is about 1 in 20. This contrasts poorly with the 1 per 100 risk of death following a heart bypass. Simple and cost-effective methods are needed to reduce the risks of major vascular surgery. Remote ischaemic preconditioning (RIPC) may be such a technique. To induce RIPC, the blood supply to muscle in the patient's arm is interrupted for about 5 minutes. It is then restored for a further five minutes. This cycle is repeated three more times. The blood supply is interrupted simply by inflating a blood pressure cuff to maximum pressure. This repeated brief interruption of the muscular blood supply sends signals to critical organs such as the brain and heart, which are rendered temporarily resistant to damage from reduced blood supply. Several small randomized clinical trials in patients undergoing different types of major vascular surgery have demonstrated a potential benefit. This large, multi-centre trial aims to determine whether RIPC can reduce complications in routine practice.

Stroke and abdominal aortic aneurysms (AAAs) are common and highly lethal vascular diseases. Angiogenesis and infiltration of inflammatory cells such as macrophages may cause stroke and AAAs. The purpose of this study is to test PET/CT and PET/MRI imaging to specifically detect those diseases using a new developed agent (18F-FPPRGD2) that can target angiogenesis and macrophages.