Comparison of the strain field of abdominal aortic aneurysm measured by magnetic resonance imaging and stereovision: A feasibility study for prediction of the risk of rupture of aortic abdominal aneurysm

Wang, Yufei; Joannic, David; Delassus, Patrick; Lalande, Alain; Juillion, Patrick; Fontaine, Jean-François

doi:10.1016/j.jbiomech.2015.01.017

Cited by 8 publications

(6 citation statements)

References 27 publications

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“…To obtain consistent information on the variation in shape, the method chosen for analysis is Lagrangian, i.e., the selected pixels are the same for each frame. First, the outer diameters of the aorta are estimated by selecting pairs of specular segments on the axis of the aortic arch [37,38] and considering the pixels contained in each segment (i.e., the red lines in panel c). Second, a LabView algorithm, suitably implemented for this purpose, records as origins the coordinates of the pixels.…”

Section: Conflicts Of Interestmentioning

confidence: 99%

Distensibility of Deformable Aortic Replicas Assessed by an Integrated In-Vitro and In-Silico Approach

et al. 2022

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The correct estimation of the distensibility of deformable aorta replicas is a challenging issue, in particular when its local characterization is necessary. We propose a combined in-vitro and in-silico approach to face this problem. First, we tested an aortic silicone arch in a pulse-duplicator analyzing its dynamics under physiological working conditions. The aortic flow rate and pressure were measured by a flow meter at the inlet and two probes placed along the arch, respectively. Video imaging analysis allowed us to estimate the outer diameter of the aorta in some sections in time. Second, we replicated the in-vitro experiment through a Fluid-Structure Interaction simulation. Observed and computed values of pressures and variations in aorta diameters, during the cardiac cycle, were compared. Results were considered satisfactory enough to suggest that the estimation of local distensibility from in-silico tests is reliable, thus overcoming intrinsic experimental limitations. The aortic distensibility (AD) is found to vary significantly along the phantom by ranging from 3.0 × 10−3 mmHg−1 in the ascending and descending tracts to 4.2 × 10−3 mmHg−1 in the middle of the aortic arch. Interestingly, the above values underestimate the AD obtained in preliminary tests carried out on straight cylindrical samples made with the same material of the present phantom. Hence, the current results suggest that AD should be directly evaluated on the replica rather than on the samples of the adopted material. Moreover, tests should be suitably designed to estimate the local rather than only the global distensibility.

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Section: Conflicts Of Interestmentioning

confidence: 99%

Distensibility of Deformable Aortic Replicas Assessed by an Integrated In-Vitro and In-Silico Approach

et al. 2022

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“…Clinical and experimental observations have indicated that various biomechanical conditions interactively influence the progression of an aortic aneurysm [6,7]. Fig.…”

Section: Hemodynamic Forces Relevant To Aortic Pathologymentioning

confidence: 99%

Computational Fluid Dynamics Modeling in Aortic Diseases

Ueda

Suito

Ota

et al. 2018

Cardiovasc Imaging Asia

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In recent years, computational fluid dynamics (CFD) has attracted considerable attention in cardiovascular medicine. In addition to traditional assessment based on anatomical information, the CFD-based approach provides an opportunity to gain novel insights into vascular pathophysiology by exploring the relationship between structure and biomechanical forces in flow dynamics. As recently CFD modeling is widely used in clinical situations, it is very important for clinicians to understand the basic principles, benefits, limitations, and pitfalls of CFD modeling. In this paper, we present an overview of CFD modeling and its application to aortic diseases, and primarily to aortic aneurysms.

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“…AAA accounts for ~15,000 deaths in the USA per year (2). In addition, 30-40% of patients with ruptured AAA die without surgery (3)(4)(5). The operative mortality rate of AAA is 40-50% (3-6), however, the overall mortality of AAA rupture is 80-90%.…”

Section: Introductionmentioning

confidence: 99%

“…Its advantage is obvious, particularly in patients with early-stage AAA. However, complications such as rupture, endoleak, device migration and limb graft occlusion are usually found after EVAR (2)(3)(4)7,8). In addition, patients receiving EVAR have been reported to have high rates of re-intervention (8).…”

Section: Introductionmentioning

confidence: 99%

Limb graft occlusion following endovascular aortic repair: Incidence, causes, treatment and prevention in a study cohort

Wang

Zhai

et al. 2017

Experimental and Therapeutic Medicine

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Abstract. The present study investigated the incidence, causes, treatment and prevention of limb graft occlusion following endovascular aortic repair (EVAR). A total of 66 cases of abdominal aortic aneurysm receiving EVAR at our department from January 2005 to December 2013 were enrolled. After EVAR, patients received routine antiplatelet therapy of 75 mg PLAVIX for 6 months and then 100 mg Aspirin for another 6 months by oral administration. According to previous clinical experiences, antiplatelet therapy is able to effectively reduce the incidence of iliac occlusion after EVAR. A total of 61 bifurcated grafts and 5 aortauniilac grafts (127 limbs in total) were used. Physical examination, ankle-brachial-index and computer tomographic angiography were performed at 10 days, at 3, 6 and 12 months and annually thereafter. It was found that 7 limbs in 7 patients (10.6% of patients, 5.5% of limbs) were occluded between 20 days and 12 months (average, 7.8±5.3 months) after EVAR. Acute and severe ischemia was found in 2 cases, claudication was in found 3 cases, asthenia in both legs was found in 1 case and 1 case was asymptomatic. Femoral-femoral bypass, femoral-femoral bypass and stenting, aorto-iliac/femoral bypass, thrombectomy and conservative treatment were performed in 1 patient each and thrombectomy together with stenting was performed in 2 cases. Limb graft occlusion was not rare after EVAR. Treatment of this complication included surgery and endovascular therapy such as bypass, thrombectomy and thrombolysis. In conclusion, aggressive pre-emptive treatment including angioplasty and stenting prevented occlusion in certain cases.

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Comparison of the strain field of abdominal aortic aneurysm measured by magnetic resonance imaging and stereovision: A feasibility study for prediction of the risk of rupture of aortic abdominal aneurysm

Cited by 8 publications

References 27 publications

Distensibility of Deformable Aortic Replicas Assessed by an Integrated In-Vitro and In-Silico Approach

Distensibility of Deformable Aortic Replicas Assessed by an Integrated In-Vitro and In-Silico Approach

Computational Fluid Dynamics Modeling in Aortic Diseases

Limb graft occlusion following endovascular aortic repair: Incidence, causes, treatment and prevention in a study cohort

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