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Results 501 - 550 of 2170
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Mei Jin - - 2013
PURPOSE: The posterior forearm is an excellent donor site for the vascular pedicled cutaneous flaps; yet, there is surprisingly little detailed anatomical information based on clinical decision making. This study was undertaken to evaluate the anatomical basis of the dorsal forearm perforator flaps and to provide anatomical landmarks to facilitate ...
McElvany Matthew - - 2013
OBJECTIVES:: To examine the frequency of intra-articular placement of distal femoral traction pins and their proximity to the superficial femoral artery. METHODS:: Wires were placed in the distal femurs of 28 cadaveric knees at the adductor tubercle (ADT), the superior pole of the patella (SPP), and 2cm proximal to this ...
Marmagkiolis Konstantinos - - 2013
Percutaneous mitral balloon valvuloplasty (PMBV) was initially described by Inoue in 1984 as a novel percutaneous technique for the management of mitral stenosis. Intracardiac echocardiography was initially used in the 1980s but was not universally accepted due to its high-frequency transducers and problems with steerability and manipulation. In the 1990s ...
McCarthy Elizabeth A - - 2013
A Web-based survey of Royal Australian and New Zealand College of Obstetricians and Gynaecologists (RANZCOG) fellows and trainees who perform or act on umbilical artery Doppler showed heterogeneous reporting practices. Systolic: diastolic ratio is frequently used. Pulsatility index is favoured internationally and by many RANZCOG subspecialists. Unpublished charts are used ...
Hameeteman K - - 2013
The distensibility of a blood vessel is a marker of atherosclerotic disease. In this paper we investigate the feasibility of measuring carotid artery distensibility on 4D CTA, both manually and using a new automatic method. On 4D CTA datasets manual (n=38) and automatic (n=76) measurements of the carotid distensibility were ...
Milburn James - - 2013
BACKGROUND/OBJECTIVE: This was a retrospective single operator experience of aneurysm coiling at the Ochsner Clinic, comparing the Penumbra coil 400 with the other most commonly used coil types, Orbit and Galaxy. METHODS: 40 aneurysms treated exclusively with Orbit or Galaxy coils and 18 aneurysms treated only with Penumbra coils from ...
Orozco Vicente - - 2013
Percutaneous transluminal angioplasty and stenting is being employed with increasing frequency for stenosis involving the brachiocephalic circulation. However, the efficacy of these procedures is limited by intimal hyperplasia and subsequent re-stenosis. Long-term results for treating lesions of the subclavian or innominate artery have shown significant re-stenotic rate. Accordingly, carotid-subclavian bypass ...
Bilgel Murat - - 2013
Labeling of cerebral vasculature is important for characterization of anatomical variation, quantification of brain morphology with respect to specific vessels, and inter-subject comparisons of vessel properties and abnormalities. We propose an automated method to label the anterior portion of cerebral arteries using a statistical inference method on the Bayesian network ...
Cho Young Dae - - 2013
INTRODUCTION: Protection techniques using stents or balloons are occasionally limited in coil embolization of wide-necked posterior communicating artery (PcomA) aneurysms in which the PcomA originated from the aneurysm neck at an acute angle. Here, we present two cases undergoing retrograde stenting through the posterior cerebral artery in coil embolization of ...
Ross Kharah M - - 2013
Objective: There is mounting evidence that high levels of self-esteem are associated with better health outcomes, particularly in older adults dealing with serious medical illnesses. Much less is known about how this linkage unfolds developmentally, particularly during times like adolescence, when youngsters' self-views are typically in flux. Here we explore ...
Cognet Thomas - - 2013
Congenital bicuspid aortic valve (BAV) is the most common congenital heart defect and may be responsible for aortic stenosis early in life. However, its pathogenesis remains unclear. A relationship between the severity of aortic stenosis and valvular surfaces has not been reported in the paediatric population. To assess the feasibility ...
Gao Feng - - 2013
One treatment method for aortic aneurysm is the invasive insertion of a stent into the aneurysm. Another method is wrapping the aneurysm using newly developed expanded polytetrafluoroethylene (PTFE) material. A virtual stented aneurysm model and a wrapped aneurysm model were created to study the flow and wall dynamics by means ...
Lee Chang-Joon - - 2013
Computational fluid dynamics simulations can provide important hemodynamic insights for investigating the effectiveness of carotid artery stenting, but its accuracy is dependent on the boundary conditions such as the outflow pressure, which is difficult to obtain by measurements. Many computational fluid dynamics simulations assume that the outflow pressure is constant ...
Kim Dong Bin - - 2013
This study seeks to improve the mechanical performance of stents by conducting reliability performance testing and finite element method (FEM)-based simulations for coronary stents. Three commercially available stent designs and our own new design were tested to measure the factors affecting performance, specifically foreshortening, recoil, radial force, and flexibility. The ...
Bingyuan Bao - - 2013
Objectives: The study aimed to assess the feasibility of a novel device and technique for antegrade percutaneous balloon aortic valvuloplasty (BAV) in a swine model. Background: BAV is currently being applied more frequently compared to the past with the advent of transcatheter aortic valve replacement. Although the antegrade BAV approach ...
Li Xuehua - - 2013
OBJECTIVE: The objective of this study was to assess the efficacy and clinical value of 64-slice computed tomography angiography (CTA) with image fusion for demonstrating the perigastric venous anatomy. METHODS: Twenty-six patients with gastric cancer underwent abdominal CTA examinations. Computed tomography angiography of stomach and perigastric veins and arteries were ...
Kang Ho-Jun - - 2013
Keyhole craniotomy is a modification of pterional craniotomy that allows for use of a minimally invasive approach toward cerebral aneurysms. Currently, mini-pterional (MPKC) and supraorbital keyhole craniotomies (SOKC) are commonly used. In this study, we measured and compared the geometric configurations of surgical exposure provided by MPKC and SOKC. Nine ...
Ruano Rodrigo - - 2013
Objectives To estimate the accuracy of the quantitative lung index and contralateral lung area for prediction of the neonatal outcome in isolated congenital diaphragmatic hernia in comparison to other available prediction models. Methods Between January 2004 and December 2010, 108 fetuses with isolated (82 left-sided and 26 right-sided) congenital diaphragmatic ...
Cheng Ye - - 2013
The shape and position of the cavernous segment of the internal carotid artery (CSICA) are complicated, which makes the surgeries around it difficult. There were many reports about the primary event of internal carotid artery injury resulting in hemorrhage during transsphenoidal resection of pituitary tumors. The anatomical relationship between CSICA ...
Chiu Kuan-Ming - - 2013
For cardioplegia delivery and removing air from the aorta in minimally invasive mitral valve operations, we would like to propose a cost-effective pigtail method. The 8F pigtail punctures the aorta, delivers cardioplegia, and stays in place for removing air from the aorta. We then slide its tip out of the ...
Clevert D A - - 2013
PURPOSE: To evaluate the feasibility of the classification of endoleaks following endovascular aortic aneurysm repair using the time-to-peak of the contrast agent in CEUS examinations. MATERIAL AND METHODS: In this retrospective study, a cohort of 171 patients with a total of 489 CEUS follow-up examinations after EVAR were included. In ...
Sadasivan Chander - - 2013
Endovascular coiling of cerebral aneurysms remains limited by coil compaction and associated recanalization. Recent coil designs which effect higher packing densities may be far from optimal because hemodynamic forces causing compaction are not well understood since detailed data regarding the location and distribution of coil masses are unavailable. We present ...
Yan Tristan D - - 2013
Considered a standard part of aortic arch surgery, hypothermia can sufficiently reduce cerebral metabolic demand to permit reasonable periods of circulatory arrest. Yet despite its ubiquitous application and critical importance, temperature classification in hypothermic circulatory arrest is still without clear definition. The following Consensus from experts in high-volume aortic institutions ...
García Alberto - - 2013
The study of the mechanical properties of swine carotids has clinical relevance because it is important for the appropriate design of intravascular devices in the animal trial phases. The inelastic properties of porcine carotid tissue were investigated. Experimental uniaxial cyclic tests were performed along the longitudinal and circumferential directions of ...
Foin Nicolas N International Centre for Circulatory Health, Imperial College London, London, United Kingdom. - - 2013
Left main stenting is increasingly performed and often involves deployment of a single stent across vessels with marked disparity in diameters. Knowing stent expansion capacity is critical to ensure adequate strut apposition after post-dilatation of the stent has been performed. Coronary stents are usually manufactured in only two or three ...
Pereira V M VM Interventional Neuroradiology Unit, Neuroradiology Service, University Hospital of Geneva, Geneva, Switzerland. - - 2013
Ruptured cerebral arteriovenous malformations (AVMs) usually require treatment to avoid re-bleeding. Depending on the angioarchitecture and center strategy, the treatment can be surgical, endovascular, radiosurgical or combined methods. The classic endovascular approach is transarterial, but sometimes it is not always applicable. The transvenous approach has been described as an alternative ...
Teli Chandrika Gurulingappa CG Assistant Professor, Department of Anatomy, Meenakshi Medical College and R.I. , Kanchipuram, Tamilnadu, India - - 2013
To reveal the variations of the iliolumbar artery and the iliolumabar veins and their correlation with the surrounding important structures. We dissected the iliolumbar region bilaterally in 20 formalin-fixed adult cadavers. The diameter of the iliolumbar artery at its origin, its length up to the branching point, the distance between ...
Joshi M D - - 2013
BACKGROUND AND PURPOSE:Novel angiographic grading scales for the assessment of intracranial aneurysms treated with flow-diverting stents have been recently developed because previous angiographic grading scales cannot be applied to these aneurysms. The purpose of this study was to evaluate the inter- and intraobserver variability of the novel O'Kelly Marotta grading ...
Kroszczynski Andrzej C - - 2013
BACKGROUND: Transforaminal epidural steroid injection (TFESI) is a widely utilized interventional pain technique for radicular pain. Although the six o'clock position of the pedicle in the so-called "safe triangle" has been used as a target location, there have been a number of reported catastrophic complications of this procedure, including paraplegia. ...
Jones Anne - - 2013
BACKGROUND: Obstructive sleep apnoea-hypopnoea syndrome (OSAHS) is associated with increased cardiovascular morbidity and mortality. Our study examined arterial stiffness and endothelial function in subjects with OSAHS with no known cardiovascular disease compared to well-matched controls. METHODS: Twenty subjects with OSAHS (defined as apnoea-hypopnoea index [AHI] ⩾15 and Epworth Sleepiness Scale ...
Arepally Aravind - - 2013
PURPOSE: To demonstrate in a porcine model that reflux during embolotherapy can be relatively quantified (ie, as embolization efficiency) and that nontarget embolization can be eliminated by using an antireflux microcatheter. MATERIALS AND METHODS: Renal artery embolization was performed with radiopaque tantalum microspheres (concentration of 1 g/20 mL) in three ...
Pierre L L Department of Cardiothoracic Surgery, Skåne University Hospital, Lund University, Lund, - - 2013
The method of ex vivo lung perfusion (EVLP) has been suggested as a reliable means of differentiating between "good" and "poor" pulmonary grafts in marginal donors as, when grafts identified as good by this method are transplanted, the results do not differ from those using lungs fulfilling standard criteria. The ...
Ijichi Takeshi - - 2013
Minimizing catheter size can reduce bleeding complications in coronary angiography (CAG). We herein report extreme slender "needle size" (19-G) coronary diagnostic catheterization using a new 3-Fr diagnostic catheter by sheathless method. A 58-year-old man having effort angina underwent coronary angiography. The 3-Fr Ikari Left (IL) diagnostic catheter, which is equal ...
Hull Jeffrey E - - 2013
OBJECTIVE: The goal of this research was to compare side-to-side (STS) and end-to-side (ETS) anastomoses in a computer model of the arteriovenous fistula with computational fluid dynamic analysis. METHODS: A matrix of 17 computer arteriovenous fistula models (SolidWorks, Dassault Systèmes, France) of artery-vein pairs (3-mm-diameter artery + 3-mm-diameter vein and 4-mm-diameter ...
He Yizheng - - 2013
INTRODUCTION: In patients with programmable CSF shunt valves, the risk of unintentional valve adjustment associated with the environmental magnetic influence is ever present. We tested whether the iPad 3 with Smart Cover is capable of changing the setting of individual programmable valves ex vivo using direct fluoroscopic visualization. METHODS: The ...
Bellofiore Alessandro A Department of Biomedical Engineering, University of Wisconsin-Madison, 2146 Engineering Centers Building, 1550 Engineering Drive, Madison, WI 53706, - - 2013
The right ventricle (RV) is a pulsatile pump, the efficiency of which depends on proper hemodynamic coupling with the compliant pulmonary circulation. The RV and pulmonary circulation exhibit structural and functional differences with the more extensively investigated left ventricle (LV) and systemic circulation. In light of these differences, metrics of ...
Bueschel Philip - - 2013
BACKGROUND: Aneurysms of visceral arteries are rare, but in case of rupture, they are potentially life threatening. In addition, there is a broad spectrum of the anatomic variability for the arterial supply of the liver. METHODS: Based on a real but very rare clinical case, including its diagnostic management and ...
Schelfaut Sebastiaan - - 2013
STUDY DESIGN:: A case report of rotational vertebral artery syndrome (RVAS) and surgical treatment. OBJECTIVE:: To illustrate a safe treatment option of RVAS with diminished risk of iatrogenic damage to the vertebral artery. SUMMARY OF BACKGROUND DATA:: RVAS is an uncommon cause of symptomatic transient vertebrobasilar insufficiency induced by physiologic ...
Fujimoto Motoaki - - 2013
OBJECTIVES: Endovascular treatment with the Wingspan Stent is frequently associated with in-stent restenosis at the curved portion, leading to late-phase stroke. To explore the cause of stroke complications after treatment with the Wingspan Stent, we simulated the biomechanical responses at a curved arterial segment using the finite element method. METHODS: ...
Nusmeier A - - 2013
BACKGROUND: /st>The transpulmonary thermodilution (TPTD) technique is widely used in clinical practice for measuring cardiac output (CO). This study was designed to investigate the influence of various levels of pulmonary oedema on the reliability of CO measurements by the TPTD method. METHODS: /st>In 11 newborn lambs pulmonary oedema was induced ...
Ou Ming-Ching - - 2013
PURPOSE: To evaluate the efficacy of estimating the volume of spleen embolized in partial splenic embolization (PSE) by measuring the diameters of the splenic artery and its branches. MATERIALS AND METHODS: A total of 43 liver cirrhosis patients (mean age, 62.19±9.65 years) with thrombocytopenia were included. Among these, 24 patients ...
Hamidi-Manesh Laila - - 2013
BACKGROUND: Transcatheter balloon aortic valvuloplasty has become the first-line treatment for critical or severe aortic stenosis in neonates in many centers. Aortic regurgitation following balloon aortic valvuloplasty remains a major concern. An optimal balloon size to aortic annulus ratio in order to minimize aortic regurgitation postprocedure, while relieving the obstruction, ...
Pfenniger Alois - - 2013
Most medical implants run on batteries, which require costly and tedious replacement or recharging. It is believed that micro-generators utilizing intracorporeal energy could solve these problems. However, such generators do not, at this time, meet the energy requirements of medical implants.This paper highlights some essential aspects of designing and implementing ...
Matsubara Shigeki S Departments of Obstetrics and Gynecology, Jichi Medical University, Shimotsuke, Japan. - - 2013
For cesarean hysterectomy with placenta previa accreta, "universally achievable" measures are required. We propose eight measures: (i) placement of intra-iliac arterial occlusion balloon catheters; (ii) placement of ureter stents; (iii) "holding the cervix" to identify the site to be transected; (iv) uterine fundal incision; (v) avoidance of uterotonics; (vi) "M ...
Abou Taam Salam - - 2013
BACKGROUND: Aortic clamping time needed to carry out anastomosis during aortic surgery is one of the major predictive factors of morbidity/mortality. Because of the difficulties inherent in this technique, the duration of aortic clamping can be increased significantly with laparoscopy, which may explain why this kind of surgery is not ...
Wong Dennis T L - - 2013
BACKGROUND: Coronary computed tomography angiography (CCTA) has limited specificity for predicting functionally significant stenoses. Recent studies suggest that contrast gradient attenuation along an arterial lesion, or transluminal attenuation gradient (TAG), may provide assessment of functional significance of coronary stenosis. The use of 320-detector row computed tomography (CT), enabling near isophasic, ...
Huded Vikram - - 2013
A 54-year-old man presented with recurrent episodes of transient ischemic attacks and acute stroke secondary to a floating thrombus in the right vertebral artery (VA) with narrowing of the right VA. He was initially treated medically with anticoagulation, antiplatelets and statins but developed multiple fresh infarcts. He was then referred ...
Fukazawa Keiji - - 2013
OBJECTIVE: While rupture of cerebral aneurysms typically occurs at the fragile wall at the apex or pole, some aneurysms rupture through the body or the neck. The purpose of this study was to clarify the association between aneurysm rupture points and hemodynamic features through the use of computational fluid dynamics ...
Unzué Leire - - 2013
The optimal percutaneous treatment strategy for coronary bifurcation lesions is still unknown. Several dedicated coronary bifurcation stents, such as the Tryton Side Branch Stent (TM) (Tryton Medical, Durham, NC, USA) have been developed to improve clinical outcomes. We present a double bifurcation lesion case treated with two Tryton sidebranch stents, ...
Ito Joji - - 2013
OBJECTIVES: We evaluated the utility of novel simulator for off-pump coronary artery bypass grafting for surgical residents. METHODS: The novel simulator system "BEAT, YOUCAN" has 2 components. (1) A pink disposable silicone vessel model having a 3-layer structure mimicking the internal mammary artery. The disposable silicone vessels mimicking the coronary ...
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