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Results 201 - 250 of 2140
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Kukliński Adam A Department of Surgery, Radom Specialist Hospital, Radom, - - 2014
Splenic artery aneurysm is the third most common abdominal aneurysm. Most often it is due to pancreatitis. There were only 19 cases of aneurysms larger than 5 cm in diameter described in the literature. Management of splenic artery aneurysms depends on the size and symptoms. Invasive treatment modalities involve open ...
Akl Tony J TJ Department of Biomedical Engineering, Texas A&M University, College Station, Texas, United States of - - 2014
Liver transplants have their highest technical failure rate in the first two weeks following surgery. Currently, there are limited devices for continuous, real-time monitoring of the graft. In this work, a three wavelengths system is presented that combines near-infrared spectroscopy and photoplethysmography with a processing method that can uniquely measure ...
Umeoka Katsuya K Chiba-Hokusou Hospital, Nippon Medical School, Department of Neurosurgery, 1715 Kamagari, Inzai City, Chiba, - - 2014
In surgeries involving clamping, opening and repairing the carotid artery such as carotid endarterectomy (CEA) and proximal anastomosis at radial artery (RA) grafting, back-bleeding, often due to insufficient occlusion of the ascending pharyngeal artery (APA), must be avoided. In 96% of cases the APA originates at the dorsal side of ...
Ivanov Dmitry D Mathematical Modeling Subdepartment, Educational-Research Institute of Nanostructures and Biosystems, Saratov State University, Saratov, Russian - - 2014
This paper includes results of the first stage of research aimed at the development of recommendations for physicians in order to help them to choose a particular type of cerebral arteries aneurysms treatment. Recent studies show that the majority of aneurysms develop as a result of hemodynamic and degenerative lesions ...
Borghi Alessandro A Institute of Child Health, University College London, London, - - 2014
The present article presents a method for assessing the radial stiffness of nitinol stents. An idealized stent model was created, and its radial stiffness was calculated by means of finite element modeling. The calculations were validated against experimental measurements. The variation of radial stiffness with geometrical dimensions was calculated, and ...
Santiago-Dieppa David R DR Division of Neurosurgery, University of California, San Diego, 200 West Arbor Drive, San Diego, CA 92103, - - 2014
Middle cerebral artery (MCA) aneurysms are common entities, and those of the bifurcation are the most frequently encountered sublocation of MCA aneurysm. MCA bifurcation (MBIF) aneurysms commonly present with subarachnoid hemorrhage (SAH), are devastating, and are often lethal. At the present time, the treatment of ruptured MBIF aneurysms entails either ...
Ekici Berkay B 0000-0001-6135-2972 Department of Cardiology, Faculty of Medicine, Ufuk University, Mevlana Bulvarı (Konya Yolu) No. 86-88, Balgat, 06520 Ankara, - - 2014
Perforation of coronary arteries is a relatively rare yet life-threatening complication of percutaneus coronary interventions and is encountered in approximately 0.5% of these procedures. According to the type of coronary perforation, various methods of correction are employed, ranging from conservative approach to emergency cardiac surgery. Coronary stent-grafts are composed of ...
Skoda Ondřej O Department of neurology, 3rd Medical Faculty, Charles University, Prague, Czech Republic; Department of Neurology, General hospital, Vrchlického 59, 58633 Jihlava, Czech Republic. Electronic address: - - 2013
A reliable and safe diagnostic procedure for vertebral artery (VA) stenosis is needed, but none is generally accepted yet. In our study, we evaluated symptomatic VA stenoses using color Doppler sonography (CDS). CT angiography (CTA) has been employed as a non-invasive reference method. Next, we tested the accuracy for medium ...
Shi Chaoyang C Department of Micro-Nano Systems Engineering, Nagoya University, Japan; Department of Computing, Imperial College London, - - 2013
There are several complications associated with Stent-assisted Coil Embolization (SACE) in cerebral aneurysm treatments, due to damaging operations by surgeons and undesirable mechanical properties of stents. Therefore, it is necessary to develop an in vitro simulator that provides both training and research for evaluating the mechanical properties of stents. A ...
Itoda Yoshifumi Y Department of Cardiac Surgery, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan, - - 2013
The use of minimally invasive and robotic operations has been increasing for coronary artery bypass surgery; however, no suturing devices have been universally adopted for use in these procedures. We developed a new suturing device that enables omission of manual ligation after a running suture. Twenty-two rabbits were used in ...
Chèvre Raphael R Epidemiology, Atherothrombosis and Imaging, Centro Nacional de Investigaciones - - 2013
The inflammatory processes that initiate and propagate atherosclerosis remain poorly understood, largely because defining the intravascular behavior of immune cells has been technically challenging. Respiratory and pulsatile movements have hampered in vivo visualization of leukocyte accumulation in athero-prone arteries at resolutions achieved in other tissues. To establish and to validate ...
Prat Jordi J Department of Pediatric Surgery, Hospital Sant Joan de Déu-Hospital Clínic, Universitat de Barcelona, Barcelona, - - 2013
Background:In animal models of congenital diaphragmatic hernia (CDH), tracheal occlusion (TO) has induced maturation of both airway spaces and vascular structures. Airway and vascular response to TO are assumed to occur in parallel. This study aims to describe and measure the relationship between airway and vascular maturation induced by TO.Methods:A ...
van Horssen Pepijn P Academic Medical Center, University of - - 2013
Blood flow distribution within the myocardium and the location and extent of areas at risk in case of coronary artery disease are dependent on the distribution and morphology of intramural vascular crowns. Knowledge of the intramural vasculature is essential in novel multi-scale and multi- physics modeling of the heart. For ...
Pashaj S S Ultrasound Department, Maternity Hospital "Koco Gliozheni", - - 2013
Purpose: To demonstrate the different normal variants of the fetal pericallosal artery (PCA) with the different branching forms of callosomarginal artery (CMA) by three-dimensional glass body-rendering. Materials and Methods: With the use of the glass body mode (grey scale ultrasound and color or power Doppler), 3-D ultrasound permits precise imaging ...
Mizutani Eiki E Department of Thoracic Surgery, Tokyo Teishin Hospital, 2-14-23 Fujimi, Chiyoda-ku, Tokyo, 102-8798, Japan, - - 2013
Endo GIA(™) curved tips with Tri-Stapler(™) is more useful for the approach for pulmonary vessels than conventional straight staplers. Unless adequate space is maintained below the vessels, there is a risk of causing damage to the back of vessels with the curved tip without optional introducers. The recommended method involves ...
Di Giammarco Gabriele G Division of Cardiac Surgery, Department of Neuroscience and Imaging, University 'G.D'Annunzio' Chieti, Chieti, - - 2013
Transit-time flow measurement (TTFM) allows intraoperative functional assessment of grafts in coronary artery bypass grafting (CABG). The major limitation of this technique is a low positive predictive value (PPV) that could lead to unnecessary graft revisions. A combined approach with high-resolution epicardial ultrasonography (HR-ECUS) and TTFM was evaluated for the ...
Wilhelm B Jakub BJ Easton Hospital, Drexel University, College of Medicine. Electronic address: - - 2013
Isolated internal iliac artery aneurysms (IIIAA) are a very rare form of aneurysm. The incidence increases with age and the prevalence is higher in men. The clinical presentation can vary and standard treatment protocols are not established. The first case of an IIIAA was described over 100 years ago. The ...
Lauric Alexandra A Cerebrovascular and Endovascular Division, Department of Neurosurgery, Tufts Medical Center, Boston, Massachusetts, - - 2013
Aneurysm formation in locations not involving vascular bifurcations has not been thoroughly analyzed. This study evaluated the relationship between the degree of vessel curvature and the presence of intracranial sidewall aneurysms of the internal carotid artery (ICA). Catheter-based 3D-rotational angiographic volumes and demographic data were available for 130 ICAs. Mean ...
Lee Whal W 0000-0003-1285-5033 Department of Radiology, Seoul National University College of Medicine, Seoul, - - 2014
Carotid Doppler ultrasonography is a popular tool for evaluating atherosclerosis of the carotid artery. Its two-dimensional gray scale can be used for measuring the intima-media thickness, which is very good biomarker for atherosclerosis and can aid in plaque characterization. The plaque morphology is related to the risk of stroke. The ...
Kontopodis N - - 2013
Aim: In order to evaluate the elastic behavior of the abdominal aortic aneurysm (AAA), the distribution of aortic deformation during the cardiac cycle is measured. Moreover, the distensibility of the AAA composite structure consisting of the AAA wall and the intraluminal thrombus (ILT), as well as that of the adjacent ...
Mizuno Takeshi - - 2013
We designed a novel method for constructing an autologous heart valve with a stent, called a stent-biovalve. In constructing completely autologous heart valves, named biovalves, which used in-body tissue architecture technology, tissues for leaflets were formed via ingrowths into narrow apertures in the preparation molds, frequently leading to delayed or ...
Friedrich Linda H - - 2013
Aortic valve degeneration and dysfunction is one of the leading causes for morbidity and mortality. The conventional heart-valve prostheses have significant limitations with either life-long anticoagulation therapeutic associated bleeding complications (mechanical valves) or limited durability (biological valves). Tissue engineered valve replacement recently showed encouraging results, but the unpredictable outcome of ...
Cho Akihiro - - 2013
In previous reports of laparoscopic pancreaticoduodenectomy, the Kocher maneuver with a wide mobilization of the right colonic flexure is carried out in the early phase, and dissection of the superior mesenteric artery is performed in the last phase of resection. This report describes laparoscopic superior mesenteric artery first approach, in ...
Kim Tae-Hee - - 2013
I thank Prof. Matsubara for his interest in my new procedure of uterine compression using an intrauterine balloon. Postpartum hemorrhage is a substantial burden for obstetricians. Thus, many methods for achieving hemostasis have been developed to preserve the uterus. Although uterine artery embolization is very effective for postpartum hemorrhage, hospitals ...
Azarnoush Kasra - - 2013
Aortic valve stenosis is one of the most common heart diseases in older patients. Nowadays, surgical aortic valve replacement is the 'gold standard' treatment for this pathology and the most implanted prostheses are biological ones. The three most implanted bovine bioprostheses are the Trifecta valve (St. Jude Medical, Minneapolis, MN, ...
Rashid Reza Javad - - 2013
Abstract Introduction: Multidetector-row computed tomography (MDCT) angiography is a reliable technique in preoperative renal anatomy evaluation in live renal donors. Objectives: To investigate the accuracy of early arterial phase findings and compares them with intraoperative findings. Methods: In this prospective study, 100 potential live donors undergoing preoperative MDCT and nephrectomy ...
Ruh Dominic D Gisela and Erwin Sick Chair of Micro-optics, Department of Microsystems Engineering, University of Freiburg, Freiburg, - - 2013
A refined model for the photon energy distribution in a living artery is established by solving the radiative transfer equation in a cylindrical geometry, using the Monte Carlo method. Combining this model with the most recent experimental values for the optical properties of flowing blood and the biomechanics of a ...
van Dijk Suzanne C - - 2013
Indices of arterial stiffness and aortic pressure are usually assessed by applanation tonometry. The more recently introduced oscillometric device is simpler to use. Several studies have investigated the agreement between these two devices, but not in populations with elevated levels of arterial stiffness. Therefore, we evaluated the agreement in an ...
Wu Hao - - 2013
The application of pulmonary valved conduit to reconstruct the continuity between right ventricles and pulmonary artery is one of the major surgeries. This study aimed to establish an in vivo model of in situ implantation using pulmonary valved conduit in large animals under off-pump condition to validate the long-term effects ...
Inoue Yoshito - - 2013
Anomalous origin of the right coronary artery (ARCA) from the left coronary sinus is a rare anatomic anomaly. It may cause myocardial ischemia and sudden death. Several treatments have been tried, including coronary bypass grafting, unroofing, and reimplantation. These techniques, however, have disadvantages such as postoperative flow competition, aortic insufficiency, ...
Qiao Aike - - 2013
We sought to investigate the effects of endovascular stents with different links for treating stenotic vertebral artery and to determine the relationship between the shape of the link and in-stent restenosis (ISR). We also attempted to provide scientific guidelines for stent design and selection for clinical procedures. Models of three ...
Roszelle Breigh N - - 2013
Background: Whether treated surgically or with endovascular techniques, large and giant cerebral aneurysms are particularly difficult to treat. Nevertheless, high porosity stents can be used to accomplish stent-assisted coiling and even standalone stent-based treatments that have been shown to improve the occlusion of such aneurysms. Further, stent assisted coiling can ...
Nikolić Igor M IM Clinic of Neurosurgery, Clinical Center of Serbia, Belgrade, Serbia. - - 2013
Aneurysms in brain blood vessels are expanding bags composed of a neck, body and fundus. Clear visibility of the neck, the position of the aneurysm and surrounding structures are necessary for a proper choice of methods for excluding the aneurysm from the circulation. The aim of this study was to ...
Bayramoğlu Tünzale T Çukurova University, Faculty of Medicine, Department of Cardiology, Adana, - - 2013
Pulse wave velocity (PWV) and aortic augmentation index (AI) are indicators of arterial stiffness. Pulse wave reflection and arterial stiffness are related to cardiovascular events and sickle cell disease. However, the effect of these parameters on the heterozygous sickle cell trait (HbAS) is unknown. The aim of this study is ...
Chung Ju-Hye - - 2013
Epicardial adipose tissue (EAT) is a contributing factor of metabolic syndrome (MS) and coronary artery disease (CAD). However, it is still unclear which measurement location of EAT area best reflects its cardiometabolic risk. The purpose of our study was to investigate the distribution of EAT and its relationship to the ...
Vismara R R Department of Electronic, Information and Bioengineering, Politecnico di Milano, via Golgi 39, Milan 20133, Italy; ForCardioLab, Fondazione per la Ricerca in Cardiochirurgia ONLUS, Milan, Italy. Electronic address: - - 2013
Aortic interleaflet triangle reshaping (AITR) is a surgical approach to aortic valve incontinence that involves placing three stitches at half of the interleaflet triangles height. In this work, the relationship between the actual stitch height and valve functioning, and the safety margin that the surgeon can rely on in applying ...
Liu Yong - - 2013
Previous studies have demonstrated the higher accuracy of frequency-domain optical coherence tomography (FD-OCT) for quantitative measurements in comparison with intravascular ultrasound (IVUS). However, those analyses were based on the cross-sectional images. The aim of this study was to assess the accuracy of FD-OCT for longitudinal geometric measurements of coronary arteries ...
Vijarnsorn Chodchanok - - 2013
Children with right ventricular outflow tract obstructive (RVOTO) lesions require precise quantification of pulmonary artery (PA) size for proper management of branch PA stenosis. We aimed to determine which cardiovascular magnetic resonance (CMR) sequences and planes correlated best with cardiac catheterization and surgical measurements of branch PA size. Fifty-five children ...
Salman Loay - - 2013
Vessel diameter is objectively measured by a lead ruler positioned in the fluoroscopic field and software calibration during angioplasty. We conducted a prospective study to evaluate the accuracy of lead ruler determination of vessel diameter. Chronic hemodialysis patients undergoing an angioplasty procedure were included in this study (n = 37). Vessel diameter ...
Watanabe Shin - - 2013
Aims: To assess when and how the microcatheter-facilitated reverse wire technique should be applied to cross the guidewire into side branches in coronary bifurcations. Methods and results: Three interventional cardiologists with different levels of experience performed in vitro bench testing using an originally developed coronary bifurcation simulator which had six ...
Nilsson Tobias - - 2013
To improve cardiovascular research, there is a growing need for arterial characterization in small animals. We developed a method, ARTIC (arterial characterization) for measuring lumen diameter, distension and intima media thickness (IMT). In this study ARTIC was used to automatically characterize the aorta of premature rabbit pups. Automatic measurements were ...
Lopez-Mendez Maria A - - 2013
Worldwide preeclampsia (PE) is the leading cause of maternal death and affects 5 to 8% of pregnant women. PE is characterized by elevated blood pressure and proteinuria. Doppler Ultrasound (US) evaluation has been considered a useful method for prediction of PE; however, there is no complete data about the most ...
Bonnafy Tiphaine - - 2013
Despite favorable results of randomized studies and several guidelines, screening for abdominal aortic aneurysm is poorly implemented in most countries. In order to implement an effective abdominal aortic aneurysm screening programme, training of physicians other than cardiovascular imaging specialists is necessary. Also, the use of pocket-sized ultrasound systems seems an ...
Ikeda Chikako - - 2013
A new method was developed to harvest bilateral internal thoracic artery grafts using a subxiphoid approach and robotic assistance. The present study compared the potential utility of the subxiphoid method with that of the lateral thoracic approach. The first part of the study examined the optimal placement of the instrument ...
Ko Brian S - - 2013
To determine the accuracy of 320-row multidetector coronary computed tomography angiography (M320-CCTA) to detect functional stenoses using fractional flow reserve (FFR) as the reference standard and to predict revascularisation in stable coronary artery disease. One hundred and fifteen patients (230 vessels) underwent M320-CCTA and FFR assessment and were followed for ...
Washington Chad W - - 2013
Changing landscapes in neurosurgical training and increasing use of endovascular therapy have lead to decreasing exposure in open cerebrovascular neurosurgery. To ensure the effective transition of medical students into competent practitioners, new training paradigms must be developed. Using principles of pattern recognition, a classification scheme for middle cerebral artery bifurcation ...
Rahal Jason P JP Cerebrovascular and Endovascular Division, Department of Neurosurgery, Tufts Medical Center and Tufts University School of Medicine, 800 Washington Street #178, Proger 7, Boston, MA 02111, - - 2013
Several stent-supported coiling techniques have been devised for treating wide-necked bifurcation aneurysms including the Y-stent and waffle-cone constructs. The Y-stent technique is not technically possible with obtusely oriented daughter vessels, and the waffle-cone method is inadequate for aneurysms with necks exceeding the stent's maximal expansion diameter. We describe here the ...
Clouet J - - 2013
This study has two aims. The first is to compare conventional lipiodol chemo-embolization (Trans Arterial Chemo-Embolization - TACE) to one using pre-loaded particles (Trans Arterial Chemo-Embolisation-Drug Eluted Bead - TACE-DEB) using a cost minimization study. The second is to define the fundable nature of TACE-DEB and the conditions under which ...
Kanber Baris - - 2013
The purpose of this study was to determine whether surface irregularities measured from ultrasound images of carotid artery plaques and quantified using a novel method, correlate with the presence of ipsilateral hemispheric cerebrovascular symptoms. A plaque surface irregularity index (SII) was measured in 47 carotid artery plaques (32 subjects, stenosis ...
Forkert N D - - 2013
Objectives: The cerebroarterial system is a complex network of arteries that supply the brain cells with vitally important nutrients and oxygen. The inter-individual differences of the cerebral arteries, especially at a finer level, are still not understood sufficiently. The aim of this work is to present a statistical cerebroarterial atlas ...
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