View clinical trials related to Aortic Aneurysm.
Filter by:The overall aim is to determine the frequency by which women and men with intact abdominal aortic aneurysms (AAA) are treated with elective surgery at three vascular outpatient clinics in Europe, and to investigate whether the reasons to refrain from elective surgery differ between the sexes.
This is a retrospective cohort study of consecutive patients submitted to elective EVAR, between February/2009 and May/2019 in a single institution. Symptomatic or ruptured AAA, mycotic aneurysms, isolated iliac aneurysms and complex abdominal aortic repairs were excluded. The primary outcomes were freedom from secondary intervention and compliance with follow-up, defined as surveillance imaging performed within a periodicity no longer than 18 months.
The treatment of aortic aneurysms is today based on different indicators (diameters, lengths, angles, volumes of the arteries) measured on CT scan images. Several indicators are time consuming and complicatated to measure. They demand training and practice. Nurea is developing a software for automatic measurement of these indicators, PRAEVAorta® 2, to facilitate and assist the physician in his clinical routine. The purpose of this study is to compare the analysis realised by the software PRAEVAorta® 2 with the analysis realised by the healthcare professional on retrospective CT scan images. Contrasted and non-contrasted, pre-operation or post-operation CT scans from 50 patients will be analysed. The main objectif is to validate the accuracy of the software by demonstrating its adequacy to the standard method of analysis. The second objectives are the following: - Evaluate the security of the software PRAEVAorta® 2 - Evaluate the unanticipated risks related to the use of the software - Validate the accessory PRAEVAorta® Web We make the following assumption : 90% of the patients show 90% of adequacy to the healthcare professional analysis
The purpose of the registry is to compare the surgical and endovascular approaches to the treatment of thoracoabdominal aortic aneurysms.
The aim of the present study was to investigate outcomes of a propensity matched series of patients treated with F-BEVAR and open surgery repair for complex abdominal aortic aneurysm in two aortic high-volume centres.
In clinical practice a lot of EVAR cases are performed IFU for adverse neck anatomy(6) with acceptable short- and mid-term outcomes, but the long-term durability is currently an issue (7). Neck length shorter than 15 mm and angulation are two of. neck charteristics. that contribute more to define an "hostile neck" (8). The issue linked to the anatomical not feasibility of standard EVAR in patients not eligible for OR can be solved with custom made devices (CMD), but they were limited by high production costs and long time for creations (10-12 weeks)1. Nowadays no one off-the-shelf device aimed to overcome neck hostility in AAA is available on the market. The present study aims at evaluating the anatomical applicability of an off-the-shelf scalloped stent-graft to treat infrarenal AAA with a short and/or angulated neck.
Rationale: An abdominal aortic aneurysm (AAA) is a common vascular disease with a high mortality in case of rupture. The underlying processes initiating aneurysmal degeneration and driving aneurysmal growth remain poorly understood. Local hemodynamics might play a key role in the pathogenesis of AAA, as it is associated with aneurysmal growth, intraluminal thrombus formation and rupture risk. Visualizing and quantifying local blood flow profiles could eventually provide more insight in the underlying mechanisms of aneurysm progression as well as identify smaller AAA with increased vulnerability or larger AAA with low risk of rupture. Consequently, this may improve risk assessment and provide patient-specific therapy guidance. Nowadays, endovascular aneurysm repair (EVAR) is the preferred treatment modality in most patients with an infrarenal AAA. However, EVAR is associated with a relatively high reintervention rate. It is hypothesized that the placement of a stent graft may alter local hemodynamics and subsequent recirculations or flow stagnations promote the onset of thrombosis or micro-emboli. These unfavourable flow conditions might be related to various complications after EVAR, such as limb occlusion, renal dysfunction, and the persistence of type II endoleaks. Visualizing local blood flow profiles after EVAR might provide insight in these (un)favourable conditions. In vivo blood flow quantification is a great challenge, particularly in the abdomen. Advanced ultrasound based techniques, incorporating ultrasound contrast agents and plane wave imaging, proved to be feasible in quantifying aortoiliac blood flow patterns in healthy volunteers. Objective: The aim of this study is to determine the feasibility of ultrafast contrast-enhanced ultrasound particle image velocimetry (echoPIV) measurements to quantify spatiotemporal blood flow velocity profiles in the abdominal aorta of AAA patients before and after endovascular repair. Secondary objectives are to determine the correlation between echoPIV and phase-contrast MRI (PC MRI) based measurements to ultimately validate the spatiotemporal velocity profiles obtained with echoPIV. Furthermore, changes in blood flow velocity profiles after placement of a stent graft will be evaluated.
Abdominal aortic aneurysm (AAA) is a multifactorial degenerative disorder, which if untreated might lead to catastrophic complications. The treatment for AAA includes open and endovascular repair, both of which carry a significant degree of risk. Thus, researchers have performed several studies addressing simple and readily available risk stratification markers, such as complete blood count in patients undergoing open AAA repair. The neutrophil to lymphocyte ratio (NLR) has been frequently used as a marker of systemic inflammatory response, which reflects neutrophilia and lymphopenia. The primary pathophysiology of AAA involves chronic inflammation in the aortic wall and atherosclerosis, accompanied with thrombosis. NLR was proposed as a fair indicator for poor prognosis in patients with AAA. The mean platelet volume (MPV) is the marker of platelet activation and an indicator of the activation of thrombus formation. Moreover, it is reportedly associated with the prognosis of patients with cardiovascular diseases. Moreover, the platelet to lymphocyte ratio (PLR) suggests thrombosis and inflammation and indicates a high risk of cardiovascular events in various groups of patients. The PLR is associated with poor prognosis following AAA repair. Despite accumulating evidence for the prognostic value of white blood cell counts in abdominal aortic aneurysm, few studies have investigated the value of these parameters, including NLR, MPV, and PLR, in patients undergoing AAA open repair. The investigators aimed to investigate if preoperative neutrophil to lymphocyte ratio (NLR), platelet to lymphocyte ratio (PLR), or mean platelet volume (MPV) could be used to predict 1-year mortality in patients undergoing open abdominal aortic aneurysm (AAA) repair.
The study of demographics and risk factors for abdominal aortic aneurysms, allows to individualize treatment approaches. Determining of the results of treatment of patients who requires a late open conversion after EVAR will allow to develop the surgical approach and the selection of the optimal type of surgical treatment. Determination of genetic polymorphisms will reduce the number of postoperative complications by predicting of possible complications in the long term period.
The purpose of the registry is to evaluate the peri-operative, short-, and mid- outcomes of endovascular treatment of thoracoabdominal aneurysms with multibranched endografts via total transfemoral approach for visceral vessels cannulation using steerable sheaths