Search Results
Results 351 - 400 of 2182
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Russell Jeremy H - - 2013
The management of unruptured aneurysms is controversial, with the decision to treat influenced by aneurysm characteristics including size and morphology. Aneurysmal bleb formation is thought to be associated with an increased risk of rupture. To correlate computational fluid dynamic (CFD) indices with bleb formation. Anatomical models were constructed from three-dimensional ...
Son Myoung Kyun - - 2013
Aortic root size is an important parameter in vascular diseases and can be easily assessed by transthoracic echocardiography. However, measurements values may vary according to cardiac cycle and the definition used for edge. This study aimed to define normal values according to the measurement method specified by two different guidelines ...
Wu Yongyou - - 2013
This paper aims to report the complete absence of the superior mesenteric artery (SMA) in an adult and to propose a new classification method for the superior-inferior mesenteric arterial variations (SIMAV). A 69-year-old female was referred for abdominal pain and change of stool habits and characteristics. Multi-detector computed tomography (MDCT) ...
Yoo Saha - - 2013
To introduce a safe and reliable method for the management of peripheral vessels around the uterine artery during abdominal radical hysterectomy or abdominal radical trachelectomy. From 2007 to 2011, 102 patients with invasive cervical cancer underwent an abdominal radical hysterectomy. In 48 operations in 2007-2009, we performed the conventional radical ...
Zarins Christopher K CK HeartFlow, Inc., Redwood City, CA, USA, - - 2013
Recent advances in image-based modeling and computational fluid dynamics permit the calculation of coronary artery pressure and flow from typically acquired coronary computed tomography (CT) scans. Computed fractional flow reserve is the ratio of mean coronary artery pressure divided by mean aortic pressure under conditions of simulated maximal coronary hyperemia, ...
Higuchi Kazuhiko K Department of Cardiovascular Surgery, NTT Medical Center Tokyo, Tokyo, - - 2013
Here, we describe a technique for creating a secure anastomosis between a graft and the stump of the aorta, involving the fragile aortic wall between the folded flap of the graft inside the aorta and a Teflon felt strip outside.
Wang Yang - - 2013
The type of paraclinoid aneurysm has been used to decide management methods. Our aim was to assess the relation of the types of paraclinoid aneurysms and outcomes after endovascular treatment and the efficiency of present endovascular techniques. A retrospective analysis was performed on patients with saccular paraclinoid aneurysms that had ...
Shahzad Rahil - - 2013
Accurate detection and quantification of coronary artery stenoses is an essential requirement for treatment planning of patients with suspected coronary artery disease. We present a method to automatically detect and quantify coronary artery stenoses in computed tomography coronary angiography. First, centerlines are extracted using a two-point minimum cost path approach ...
Byrne G - - 2013
BACKGROUND AND PURPOSE:Hemodynamics play an important role in the mechanisms that govern the initiation, growth, and possible rupture of intracranial aneurysms. The purpose of this study was to objectively characterize these dynamics, classify them, and connect them to aneurysm rupture.MATERIALS AND METHODS:Image-based computational fluid dynamic simulations were used to re-create ...
Lauric Alexandra - - 2013
Flow induced tangential wall shear stress (WSS) is thought to be involved in aneurysm formation, growth, and rupture. Low WSS was previously associated with rupture, but definitive quantitative analyses remain scant as larger aneurysms are associated with lower WSS regardless of rupture status, and ruptured aneurysms are larger than unruptured ...
Celi Simona - - 2013
In clinical practice, maximum diameter is used as a criterion to estimate aneurysm-rupture risk; however, it is only a general indicator and its value becomes difficult to estimate in the thoracic segment. Improved understanding of aortic aneurysm complexity and biomechanics is needed to achieve advancements in surgical repair techniques. The ...
Islak Civan - - 2013
Endovascular treatment of geometrically complex bifurcation aneurysms using a standard Y-configured stenting technique might be extremely difficult, particularly in aneurysms with daughter branches that acutely arise from the aneurysm sac itself. In those cases, deployment of the second stent through interstices of the first stent could be troublesome because of ...
Hillebrand Julia - - 2013
Neuroprotection is of paramount interest in cardiac surgery. Right axillary artery cannulation is well established in aortic surgery because it significantly improves survival and outcome, but malperfusion of the right brain after direct cannulation has been reported. Anatomically, 4 vessel segments are potentially amenable for cannulation of the subclavian and ...
Toepker Michael - - 2013
OBJECTIVE. The purpose of this study was to use second-generation dual-source CT to assess the influence of size, degree of stenosis, luminal contrast attenuation, and plaque geometry on stenosis quantification in a coronary artery phantom. MATERIALS AND METHODS. Six vessel phantoms with three outer diameters (2, 3, and 4 mm), ...
Yu B-T - - 2013
Valve replacement is the primary surgical treatment for heart valve disease. However, the clinical benefit of biological valve substitutes is limited by their potential immunogenicity. To seek a better method of preparing biological scaffolds for tissue engineering heart valves, we compared the ability of different decellularization procedures to remove cells ...
Lalović Nenad - - 2013
Aim To determine the pattern of origin of medial circumflex femoral artery (MCFA), its origin distance from the midpoint of the inguinal ligament and the topographical relations of the origin, which have great significance in clinical work. Methods Dissections on the autopsy group of 42 thighs were performed, and anatomical ...
Riga Celia V - - 2013
Purpose : To investigate the quality of stent-graft fenestrations created in vitro using different needle puncture and balloon dilation angles in different commercial endografts. Methods : Fenestrations were made in a standardized fashion in 3 different endograft types: Talent monofilament twill woven polyester, Zenith multifilament tubular woven polyester, and Endofit ...
Mortoza Amanda Rocha - - 2013
The blood supply in the large intestine of seven specimens of the lesser anteater, Tamandua tetradactyla, studied. The method included preparation of the macroscopic collection report, perfusion of the arterial network with water, injection of colored latex, fixation in formaldehyde, and preservation in ethanol. For our description and analyses, we ...
Gür Ali Kemal - - 2013
The aim of the present study was to describe a successful method for treating rheumatic tricuspid valve stenosis with autologous pericardium, commissurotomy, and a Kalangos ring without replacing the tricuspid valve.
Lin Yidan - - 2013
When performing video-assisted thoracoscopic esophagectomy, the area at the level above the aortic and in the space between the esophagus and the spine, is usually regarded as a safe area for dissection of upper segment of thoracic esophagus. However, an aberrant right subclavian artery may appear in this area and ...
Niepoth Wouter W - - 2013
To investigate the feasibility of using endoanchor technology to reduce chimney graft-related gutter size in a juxtarenal aneurysm model. In silicone juxtarenal aortic aneurysm models with two sizes of branch arteries and two sizes of aorta, single chimney graft (CG) configurations were constructed using 6-mm Atrium balloon-expandable stent-grafts in association ...
Rachev Alexander A College of Engineering and Computing, Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208, USA. - - 2013
The objective of this study is to propose a method for preliminary processing of the experimental data from an inflation-extension test on tubular arterial specimens. The method is based on the condition for existence of a strain energy function (SEF) and can be used to verify whether the data from ...
Kanahara Masaaki - - 2013
Measurement of flow-mediated dilation (FMD) is well known as a noninvasive method for an assessment of vascular endothelial function. However, the reproducibility is a major issue of FMD measurement. The purpose of this study is to examine the reproducibility of the new FMD measurement with medial epicondyle method. First, to ...
Menke Jan - - 2013
This meta-analysis summarizes the accuracy of magnetic resonance angiography (MRA) for diagnosing residuals in coiled cerebral aneurysms by using the threefold Roy classification (residuals: none, neck, or sac). Four databases were searched from 2000 to June 2013 for eligible studies that compared MRA to digital subtraction angiography (DSA) and reported ...
Kim H - - 2013
The aim of this study was to predict the optimal depth for insertion of a left-sided central venous catheter in children. Using 3D chest computed tomography angiography, we measured the distance from a point where the internal jugular vein is at the superior border of the clavicle, and from a ...
Strobl Magdalena M 2 med. Dept., Rudolfstiftung, Juchgasse 25, A-1030 Vienna, Austria. - - 2013
The use of fractional exhaled nitric oxide (FeNO) has been suggested as a quantitative marker for pulmonary arterial hypertension (PAH) in humans. To further characterize FeNO in PAH we investigated this marker in a rodent model. Since there is no standardized technique for FeNO measurement in animals, we intended to ...
Toutouzas Konstantinos - - 2013
Microwave radiometry allows noninvasive in vivo measuring of internal temperature of tissues reflecting inflammation. In the present study, we evaluated the predictive accuracy of this method for the diagnosis of coronary artery disease (CAD). Consecutive patients (n=287) scheduled for coronary angiography were included in the study. In carotid arteries of ...
Abdi M - - 2013
The circle of Willis (CoW) is a key asset in brain performance as it supports adequate blood supply to the brain. The lumped method (electrical equivalent circuits) is a useful model to simulate the process of the human cardiovascular system. In this study, the whole cardiovascular system is modeled, using ...
Du Cailar Claude - - 2013
The ZIP technique, a surgical equivalent of the 'Preclose' technique, useful for transcatheter aortic valve implantation or endovascular aortic aneurysm repair is described. While percutaneous closure devices are expensive, need a long learning curve and are associated with primary failure, the ZIP technique is easy and allows a quick, safe ...
Parthasarathy Rajsrinivas R From the Departments of Medicine (R.P., M.K., T.J., K.S.B., A.S.) and Radiology and Diagnostic Imaging (J.L.R.), University of Alberta, Edmonton, Alberta, Canada; and UCLA Stroke Center, Los Angeles, CA - - 2013
Multimodal imaging in acute ischemic stroke defines the extent of arterial collaterals, resultant penumbra, and associated infarct core, yet limitations abound. We identified superficial and deep venous drainage patterns that predict outcomes in patients with a proximal arterial occlusion of the anterior circulation. An observational study that used computed tomography ...
Jainandunsing Jayant S - - 2013
Owing to its elliptical shape, the left ventricle outflow tract (LVOT) area is underestimated by two-dimensional (2D) diameter-based calculations which assume a circular shape. This results in overestimation of aortic stenosis (AS) by the continuity equation. In cases of moderate to severe AS, this overestimation can affect intraoperative clinical decision ...
Hartkamp Nolan S - - 2013
Vessel-encoded (VE) pseudo-continuous arterial spin labeling (p-CASL) is a territorial ASL (T-ASL) technique to identify the perfusion territories of cerebral arteries. The aim of this study was to validate the output of three Vessel-encoded p-CASL image processing methods, k-means clustering with and without subsequent linear analysis and a Bayesian framework, ...
Berg Katherine - - 2013
Radial arterial line placement is an invasive procedure that may result in complications. Validated checklists are central to teaching and assessing procedural skills and may result in improved health care quality. The results of the first step of the validation of a radial arterial line placement checklist are described. A ...
Guo Xin-Bin - - 2013
One case had a symptomatic vertebral artery stenosis coupled with a coincidental unruptured cerebral aneurysm at the same arterial anatomic segment. And another case had an asymptomatic vertebral artery stenosis coupled with a ruptured cerebral aneurysm at the same arterial anatomic segment. They underwent intracranial stenting. Both lesions were treated ...
Mirsharif Qazaleh - - 2013
In recent years researchers have found that alternations in arterial or venular tree of the retinal vasculature are associated with several public health problems such as diabetic retinopathy which is also the leading cause of blindness in the world. A prerequisite for automated assessment of subtle changes in arteries and ...
Jelenc Matija - - 2013
With a skeletonized harvesting technique of the left internal thoracic artery (LITA), opening of the pleural space during dissection can usually be avoided. However, due to the bulging of the ventilated lungs, the LITA graft comes to lie immediately below the sternum at the end of the procedure, which makes ...
Trela J M - - 2013
Intra-arterial (i.a.) and intra-venous (i.v.) regional limb perfusions (RLP) through the median artery and cephalic vein, respectively, have been previously investigated for administration of mesenchymal stem cells (MSCs) to the equine distal limb. Limitations due to thrombosis of the arteries after i.a. RLP and poor distribution of MSCs to the ...
Thomis S - - 2013
There is an increasing use of minimal invasive techniques to treat saphenous vein reflux. Among these radiofrequency ablation (RFA), endovenous laser ablation (EVLA), and foam sclerotherapy are frequently used. A new method of thermal ablation is the steam vein sclerosing (SVS) system. This study evaluates the histological changes after ablation of ...
Zhao Yili - - 2013
Objectives- This study aimed to establish reference ranges for Doppler parameters of the fetal dorsalis pedis artery and to compare them with those of the anterior tibial artery. Methods- Dorsalis pedis artery velocimetry was performed in 138 singleton fetuses. Intraobserver repeatability coefficients and differences between measurements of bilateral legs were ...
Makridis Konstantinos G - - 2013
No study exists that directly measures the distances between posterior portals and the popliteal artery under arthroscopic conditions. To define the anatomic relationship between the neural structures and standard posterior arthroscopic portals and between the popliteal artery and posterior as well as transseptal portals in different knee positions. Descriptive laboratory ...
Kragh John F JF - - 2013
The Combat Ready Clamp is indicated to stop difficult inguinal bleeding on the battlefield, the most common type of junctional bleeding and now the most common cause of preventable battlefield death. The purpose of the present study is to report the data of clamp development to help appliers use it ...
Iverson Ronald E - - 2013
This article summarizes current information on the risk and the assessment of risks for deep venous thrombosis (DVT) resulting from plastic surgery procedures. Risk assessment is the foundation for recommended methods of prevention of DVT and, in turn, possible pulmonary emboli. If prevention fails, treatment of DVT is required to ...
Dobson P F - - 2013
Compression of the ulnar nerve in Guyon's canal is an uncommon phenomenon. Reports of ulnar nerve palsy secondary to ulnar artery pseudoaneurysm at this anatomical location are very rare and equivalent pathology just distal to this site is unheard of. Here we present such a case, which featured a delayed ...
Wang Chenyu - - 2013
The shape of the cavernous segment of the internal carotid artery (CSICA) is various in different people, which makes it difficult to be located and causes a higher possibility of injury in the transsphenoidal approach. Hence, a comprehensive study of the CSICA and a meaningful classification of it are rather ...
Deo Salil V - - 2013
Supravalvar aortic stenosis (SVAS) is a congenital anomaly characterized by a discrete or diffuse narrowing of the ascending aorta. It may also be associated with right-ventricular outflow tract obstruction, aortic valve pathology and coronary ostial stenosis. While present in both familial and sporadic forms, it demonstrates a strong association with ...
Asai Tohru - - 2013
Skeletonization is an advanced technique of graft harvesting for coronary artery bypass grafting (CABG), and while it requires meticulous attention, it has many advantages. For example, skeletonization of internal thoracic artery (ITA) can minimize sternal ischemia and lower the risk of mediastinitis, and is longer and larger than pedicled ITA. ...
Hrapkowicz Tomasz - - 2013
Minimally invasive coronary artery bypass grafting via left anterior small thoracotomy is routinely performed on patients with single coronary artery disease, but recently has been expanded to a larger population as a part of a hybrid treatment in multivessel coronary artery disease. While the methods of internal mammary artery harvesting ...
Dong Jingliang - - 2013
Widely accepted treatment for carotid artery stenosis includes stenting as well as carotid endoarterectomy (CEA), despite complications associated with distal embolism. Therefore pre-screening for evaluating the extent of a stenosis is critically important before undertaking surgical procedures. This study presents and evaluates the feasibility of implementing a virtual computational hemodynamics ...
Aydoğan H - - 2013
Background. The radial artery is the most common site for arterial cannulation. Procedures for improving radial artery cannulation have involved direct visualization of the vessel with ultrasonography (US). The aim of this study evaluate the short axis and long axis radial artery measurements at 0º, 45º, 60º wrist joint angle ...
Relan D - - 2013
For the discovery of biomarkers in the retinal vasculature it is essential to classify vessels into arteries and veins. We automatically classify retinal vessels as arteries or veins based on colour features using a Gaussian Mixture Model, an Expectation-Maximization (GMM-EM) unsupervised classifier, and a quadrant-pairwise approach. Classification is performed on ...
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