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https://www.readbyqxmd.com/read/28227425/mechanical-performances-of-endovascular-aneurysm-repair-strategies-with-main-aortic-and-chimney-grafts
#1
Wei-Ling Chen, Bing-Feng Huang, Ming-Long Yeh, Chung-Dann Kan, Wei-Ling Chen, Bing-Feng Huang, Ming-Long Yeh, Chung-Dann Kan, Ming-Long Yeh, Bing-Feng Huang, Chung-Dann Kan, Wei-Ling Chen
The use of endovascular aneurysm repair (EVAR) strategies for the treatment of complex aortic pathologies is a major area of investigation in modern surgery. EVAR strategies using fenestrated or branched devices provide alternatives to open surgery for patients with aortic pathologies with visceral branch involvement, but their applications have some major limitations. To extend endovascular repair to patients whose anatomy is unfit for branched or fenestrated stent grafts or open repair, parallel graft techniques using chimney grafts (CGs) have been proposed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227223/bringing-hemodynamic-simulations-closer-to-the-clinics-a-cfd-prototype-study-for-intracranial-aneurysms
#2
Philipp Berg, Samuel Vos, Mathias Becker, Steffen Serowy, Thomas Redel, Gabor Janiga, Martin Skalej, Oliver Beuing, Philipp Berg, Samuel Vos, Mathias Becker, Steffen Serowy, Thomas Redel, Gabor Janiga, Martin Skalej, Oliver Beuing, Steffen Serowy, Martin Skalej, Oliver Beuing, Thomas Redel, Philipp Berg, Gabor Janiga, Mathias Becker
Computational Fluid Dynamics enables the investigation of patient-specific hemodynamics for rupture predictions and treatment support of intracranial aneurysms. However, due to numerous simplifications to decrease the computations effort, clinical applicability is limited until now. To overcome this situation a clinical research software prototype was tested that can be easily operated by attending physicians. In order to evaluate the accuracy of this prototype, four patient-specific intracranial aneurysms were investigated using four different spatial resolutions...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227222/hemodynamic-effects-from-coil-distribution-with-realistic-coil-models-in-an-aneurysm
#3
Soichiro Fujimura, Hiroyuki Takao, Takashi Suzuki, Chihebeddine Dahmani, Hiroya Mamori, Makoto Yamamoto, Yuichi Murayama, Soichiro Fujimura, Hiroyuki Takao, Takashi Suzuki, Chihebeddine Dahmani, Hiroya Mamori, Makoto Yamamoto, Yuichi Murayama, Makoto Yamamoto, Hiroya Mamori, Soichiro Fujimura, Takashi Suzuki, Yuichi Murayama, Chihebeddine Dahmani, Hiroyuki Takao
Because of its minimal invasiveness, coil embolization has become a popular way to treat aneurysms. The main problem with this method, however, is the poor understanding of the hemodynamics in the aneurysm after coil embolization. To improve this situation, we used a finite element method and computational fluid dynamics to investigate how hemodynamic parameters depend on the spatial distribution of coils. A basic model of an internal carotid artery aneurysm was created, and six realistic coil models were considered for the coil geometry...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227130/verification-of-a-research-prototype-for-hemodynamic-analysis-of-cerebral-aneurysms
#4
Takashi Suzuki, Cosmin Ioan Nita, Saikiran Rapaka, Hiroyuki Takao, Viorel Mihalef, Soichiro Fujimura, Chihebeddine Dahmani, Puneet Sharma, Hiroya Mamori, Toshihiro Ishibashi, Thomas Redel, Makoto Yamamoto, Yuichi Murayama, Takashi Suzuki, Cosmin Ioan Nita, Saikiran Rapaka, Hiroyuki Takao, Viorel Mihalef, Soichiro Fujimura, Chihebeddine Dahmani, Puneet Sharma, Hiroya Mamori, Toshihiro Ishibashi, Thomas Redel, Makoto Yamamoto, Yuichi Murayama, Cosmin Ioan Nita, Puneet Sharma, Hiroya Mamori, Soichiro Fujimura, Thomas Redel, Saikiran Rapaka, Chihebeddine Dahmani, Toshihiro Ishibashi, Makoto Yamamoto, Viorel Mihalef, Takashi Suzuki, Hiroyuki Takao, Yuichi Murayama
Owing to its clinical importance, there has been a growing body of research on understanding the hemodynamics of cerebral aneurysms. Traditionally, this work has been performed using general-purpose, state-of-the-art commercial solvers. This has meant requiring engineering expertise for making appropriate choices on the geometric discretization, time-step selection, choice of boundary conditions etc. Recently, a CFD research prototype has been developed (Siemens Healthcare GmbH, Prototype - not for diagnostic use) for end-to-end analysis of aneurysm hemodynamics...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227068/the-impact-of-deformation-of-an-aneurysm-model-under-pulsatile-flow-on-hemodynamic-analysis
#5
T Kawakami, H Takao, C Ichikawa, K Kamiya, Y Murayama, M Motosuke, T Kawakami, H Takao, C Ichikawa, K Kamiya, Y Murayama, M Motosuke, C Ichikawa, H Takao, K Kamiya, M Motosuke, T Kawakami, Y Murayama
Hemodynamic analysis of cerebral aneurysms has been widely carried out to clarify the mechanisms of their growth and rupture. In several cases, patient-specific aneurysm models made of transparent polymers have been used. Even though periodic changes in aneurysms due to the pulsation of blood flow could be important, the deformation of the model geometry and its effect on hemodynamic evaluation has not been fully investigated. In addition, the fabrication accuracy of aneurysm models has not been evaluated even though it may affect the hemodynamic parameters to be analyzed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226726/guide-wire-detecting-using-a-modified-cascade-classifier-in-interventional-radiology
#6
Li Wang, Xiao-Liang Xie, Zhan-Jie Gao, Gui-Bin Bian, Zeng-Guang Hou, Li Wang, Xiao-Liang Xie, Zhan-Jie Gao, Gui-Bin Bian, Zeng-Guang Hou
Endovascular surgery is becoming a widespread procedure to treat cardiovascular diseases (CVDs) such as abdominal aortic aneurysm and peripheral artery disease. The guide-wire is a crucial surgical instrument inserted into vessels to offer guidance to physicians during the surgery. There are some approaches for tracking the guide-wire, most algorithms consist of two phases, namely, the initialization phase and the tracking phase. In the initialization phase, most algorithms use B-splines for modeling the guide-wire which requires manually annotated data...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225388/mechanical-and-pharmacologic-treatment-in-a-patient-with-a-coronary-artery-aneurysm-and-acute-coronary-syndrome
#7
Grigorios Korosoglou, Tom Eisele, Peter Nunninger, Sorin Giusca
No abstract text is available yet for this article.
February 20, 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/28224953/perceived-learning-needs-of-patients-with-abdominal-aortic-aneurysm
#8
Olga Nilsson, Rebecka Hultgren, Anna Letterstål
BACKGROUND: Patients undergoing surgical treatment of abdominal aortic aneurysm (AAA) should receive adequate information about the disease, treatment options, and self-care. Patients' learning needs should be acknowledged. The aim was to describe the perceived learning needs in patients with AAA. A secondary aim was to explore their experience of methods for patient education. METHODS: Three focus group interviews were conducted with 14 patients treated with open or endovascular repair of AAA...
March 2017: Journal of Vascular Nursing: Official Publication of the Society for Peripheral Vascular Nursing
https://www.readbyqxmd.com/read/28224946/exercise-adherence-in-the-elderly-experience-with-abdominal-aortic-aneurysm-simple-treatment-and-prevention
#9
Mary McElrath, Jonathan Myers, Khin Chan, Holly Fonda
Poor adherence to health-related behaviors can have serious health consequences. Cardiac rehabilitation has been documented to have physiological and psychosocial benefits; however, optimizing adherence to exercise in patients with cardiovascular disease is a particular challenge. We recently completed a large, 6-year randomized trial of exercise training in elderly patients with abdominal aortic aneurysm (AAA) disease (50-85 years), which provided an opportunity to describe adherence strategies in this unique group of elderly individuals...
March 2017: Journal of Vascular Nursing: Official Publication of the Society for Peripheral Vascular Nursing
https://www.readbyqxmd.com/read/28224318/chemical-angioplasty-with-spasmolytics-for-vasospasm-after-subarachnoid-hemorrhage
#10
Aleš Hejčl, Filip Cihlář, Vojtěch Smolka, Petr Vachata, Robert Bartoš, Jan Procházka, Jiří Cihlář, Martin Sameš
BACKGROUND: Clinically symptomatic vasospasm leading to delayed ischemic neurological deficits occurs in up to 30% of patients with subarachnoid hemorrhage (SAH). Vasospasm can result in a serious decline in clinical conditions of patients with SAH, yet the algorithm for vasospasm treatment and prevention remains unclear. Intra-arterial administration of vasodilators is one of the modalities used for vasospasm therapy. METHODS: Over the last 7 years, we have treated 27 female and 7 male patients with vasospasm using intra-arterial administration of either nimodipine or milrinone; all had suffered aneurysm rupture...
February 21, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28224216/vascular-surgery-the-main-risk-factor-for-mortality-in-146-takayasu-arteritis-patients
#11
Nilton Salles Rosa Neto, Samuel Katsuyuki Shinjo, Maurício Levy-Neto, Rosa Maria Rodrigues Pereira
Takayasu arteritis (TA) is an idiopathic chronic inflammatory disease that affects the aorta and its main branches. According to disease involvement, patients may require surgical treatment mainly due ischemic lesions in association with medical therapy. We evaluated the impact of vascular interventions in a cohort of TA patients. Medical records from 146 TA patients were reviewed. Clinical features, medical, and surgical treatment were revised and disease activity was determined by clinical, laboratorial, and imaging parameters...
February 21, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28223428/periprocedural-outcomes-and-early-safety-with-the-use-of-the-pipeline-flex-embolization-device-with-shield-technology-for-unruptured-intracranial-aneurysms-preliminary-results-from-a-prospective-clinical-study
#12
Mario Martínez-Galdámez, Saleh M Lamin, Konstantinos G Lagios, Thomas Liebig, Elisa F Ciceri, Rene Chapot, Luc Stockx, Swarupsinh Chavda, Christoph Kabbasch, Giuseppe Farago, Hannes Nordmeyer, Thierry Boulanger, Mariangela Piano, Edoardo P Boccardi
BACKGROUND AND PURPOSE: The Pipeline Embolization Device (PED) has become a routine first-line option for treatment of intracranial aneurysms (IAs). We assessed the early safety and technical success of a new version of PED, Pipeline Flex Embolization Device with Shield Technology (Pipeline Shield), which has the same design and configuration but has been modified to include a surface synthetic biocompatible polymer. MATERIALS AND METHODS: The Pipeline Flex Embolization Device with Shield Technology (PFLEX) study is a prospective, single-arm, multicenter study for the treatment of unruptured IAs using Pipeline Shield...
February 20, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28223220/characterization-of-fc-gamma-receptor-iib-expression-within-abdominal-aortic-aneurysm
#13
Yi Shi, Ci-Qiu Yang, Si-Wen Wang, Wen Li, Jie Li, Shen-Ming Wang
OBJECTIVE: To evaluate protein profiles and Fc gamma receptor IIb (FCGRIIB) expression in abdominal aortic aneurysm (AAA) compared to the expression in normal aortas. METHODS: We performed a protein array to study the protein expression profiles within AAA and normal aortic tissues. FCGRIIB was found to be significantly elevated in AAA samples. Quantitative PCR and Western blot analyses were performed to study the expression of FCGRIIB in AAA compared to that in normal aortic tissue...
February 18, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28223113/imaging-redundancy-in-screening-for-abdominal-aortic-aneurysm-a-case-study
#14
Guangzu Gao, Anita Arora, Leslie Scoutt, Mahan Mathur
No abstract text is available yet for this article.
February 17, 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28222989/a-pilot-study-for-long-term-outcome-assessment-after-aortic%C3%A2-aneurysm-repair-using-vascular-quality-initiative-data%C3%A2-matched-to-medicare-claims
#15
Andrew W Hoel, Adrienne E Faerber, Kayla O Moore, Niveditta Ramkumar, Benjamin S Brooke, Salvatore T Scali, Art Sedrakyan, Philip P Goodney
OBJECTIVE: Accurate and complete long-term postoperative outcome data are critical to improving value in health care delivery. The Society for Vascular Surgery Vascular Quality Initiative (VQI) is an important tool to achieve this goal in vascular surgery. To improve on the capture of long-term outcomes after vascular surgery procedures for patients in the VQI, we sought to match VQI data to Medicare claims for comprehensive capture of major clinical outcomes in the first several years after vascular procedures...
February 17, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28222985/concurrent-renal-artery-stent-during-endovascular-infrarenal-aortic-aneurysm-repair-confers-higher-risk-for-30-day-acute-renal-failure
#16
Besma Nejim, Isibor Arhuidese, Muhammmad Rizwan, Lana Khalil, Satinderjit Locham, Devin Zarkowsky, Philip Goodney, Mahmoud B Malas
OBJECTIVE: Concurrent renal artery angioplasty and stenting (RAAS) during endovascular aneurysm repair (EVAR) of infrarenal abdominal aortic aneurysm (AAA) has been practiced in an attempt to maintain renal perfusion. The aim of this study was to identify the current practice of RAAS during EVAR and its effect on perioperative renal outcome. METHODS: Patients with infrarenal AAA were identified from the American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP, 2011-2014) database...
February 17, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28222654/is-coronary-arteritis-a-feature-in-secondary-haemophagocytic-lymphohistiocytosis
#17
Beng Teong See, Ke Xin Yip, Hak Lee Ang
Haemophagocytic lymphohistiocytosis (HLH) is rare. Although Kawasaki disease (KD) has been reported as a precursor to HLH, coronary arteritis occurring at the onset of secondary HLH, not in association with KD, has not been reported. An 8-year-old girl presented with virus-induced secondary HLH associated with a giant aneurysm and ectasia of the coronary arteries which was detected incidentally at onset of the disease. She did not fulfill the criteria for diagnosis of KD. The coronary lesions improved after 6 months of treatment with dexamethasone and etoposide...
February 22, 2017: Paediatrics and International Child Health
https://www.readbyqxmd.com/read/28222628/safety-and-efficiency-of-flow-diverters-for-treating-small-intracranial-aneurysms-a-systematic-review-and-meta-analysis
#18
Xiyang Yao, Junwei Ma, Haiying Li, Haitao Shen, Xiaojun Lu, Gang Chen
Background We evaluated the safety and efficiency of flow diverters (FDs) in treating small intracranial aneurysms (IAs). Materials and Methods We reviewed the literature published in PubMed and EMBASE. R for Project software was used to calculate the complete aneurysm occlusion rates, procedure-related neurologic mortality, procedure-related neurologic morbidity and procedure-related permanent morbidity. Results Ten observational studies were included in this analysis. The complete aneurysm occlusion rate was 84...
February 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28221665/totally-percutaneous-versus-surgical-cut-down-femoral-artery-access-for-elective-bifurcated-abdominal-endovascular-aneurysm-repair
#19
REVIEW
Madelaine Gimzewska, Alexander Ir Jackson, Su Ern Yeoh, Mike Clarke
BACKGROUND: Abdominal aortic aneurysms (AAAs) are a vascular condition with significant risk attached, particularly if they rupture. It is, therefore, critical to identify and repair these as an elective procedure before they rupture and require emergency surgery. Repair has traditionally been an open surgical technique that required a large incision across the abdomen. Endovascular abdominal aortic aneurysm repairs (EVARs) are now a common alternative. In this procedure, the common femoral artery is exposed via a cut-down approach and a graft introduced to the aneurysm in this way...
February 21, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28220880/parenteral-administration-of-factor-xa-iia-inhibitors-limits-experimental-aortic-aneurysm-and-atherosclerosis
#20
Corey S Moran, Sai-Wang Seto, Smriti M Krishna, Surabhi Sharma, Roby J Jose, Erik Biros, Yutang Wang, Susan K Morton, Jonathan Golledge
Intraluminal thrombus is a consistent feature of human abdominal aortic aneurysm (AAA). Coagulation factor Xa (FXa) catalyses FII to thrombin (FIIa). We examined the effect of FXa/FIIa inhibition on experimental aortic aneurysm in apolipoprotein E-deficient (ApoE(-/-)) mice infused with angiotensin II (AngII). The concentration of FXa within the supra-renal aorta (SRA) correlated positively with SRA diameter. Parenteral administration of enoxaparin (FXa/IIa inhibitor) and fondaparinux (FXa inhibitor) over 14 days reduced to severity of aortic aneurysm and atherosclerosis in AngII-infused ApoE(-/-) mice...
February 21, 2017: Scientific Reports
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