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Results 501 - 550 of 2141
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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 ...
Yokoyama Shinya - - 2013
We report a successful one-stage biventricular repair of truncus arteriosus communis with interrupted aortic arch in a neonate. This newborn girl was diagnosed with truncus arteriosus communis type III-B (Congenital Heart Surgeons Society classification) by the echocardiography and three-dimensional computed tomography. We present a new reconstructive approach for such heart ...
Guneyli Serkan - - 2013
To investigate possible protrusions through stent cells, and the factors affecting protrusions after carotid angioplasty and stenting (CAS). This ex-vivo clinical study was performed between July 2010 and August 2011 at the Department of Radiology, Ege University School of Medicine, Izmir, Turkey. After approval by the Institutional Board, 15 successive ...
Claiborne Thomas E - - 2013
Calcific aortic valve disease is the most common and life threatening form of valvular heart disease, characterized by stenosis and regurgitation, which is currently treated at the symptomatic end-stages via open-heart surgical replacement of the diseased valve with, typically, either a xenograft tissue valve or a pyrolytic carbon mechanical heart ...
Lee Won-Jeong - - 2013
The purpose of this study was to evaluate the relationship of pulmonary function impairment (PFI) and coronary artery calcification (CAC) by multi-detector computed tomography (MDCT), and the effect of pneumoconiosis on CAC or PFI. Seventy-six subjects exposed to inorganic dusts underwent coronary artery calcium scoring by MDCT, spirometry, laboratory tests, ...
Sait Doğan Mehmet - - 2013
Aim To evaluate the eficacy of the Cardiac Magnetic Resonance Perfusion (CMRP) method in detection of Coronary Artery Disease (CAD) by comparing CMRP indings with the results of Coronary Computed Tomography Angiography (CCTA) or Catheter Coronary Angiography (CCA). Methods Thirty one patients in whom CMRP was performed along with CCTA ...
Mahnken Andreas H - - 2013
BACKGROUND: Aortic thrombi in the ascending aorta or aortic arch are rare but are associated with a relevant risk of major stroke or distal embolization. Although stent grafting is commonly used as a treatment option in the descending aorta, only a few case reports discuss stenting of the aortic arch ...
Bassano Carlo - - 2013
Several methods have been proposed to avoid cerebral damage during aortic arch surgery. Antegrade, bilateral, selective cerebral perfusion is probably the most efficient one, although it has some drawbacks, such as air or particulate embolism risk, limitation in operative field visibility, and interactions with surgical maneuvers. We describe a surgical ...
Teitelbaum Aaron A AA Schulich Heart Centre, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, ON, - - 2013
Percutaneous revascularisation of chronic total occlusions (CTO) is limited by failure of guidewire crossing. Neovascularisation within the proximal CTO segment may be important for guidewire crossing and dramatically declines in CTO beyond six weeks of age. The aims of the current study were to determine whether local delivery of a ...
Bozkurt A - - 2013
Woven coronary artery is an extremely rare and not clearly defined congenital malformation in which the epicardial coronary artery is divided into multiple thin channels. These multiple channels merge again into a normal conduit. This anomaly is a benign condition because there is normal blood flow after the anomalous segment ...
Yuan Li-Jun - - 2013
OBJECTIVE: Whether the regional elastic arteries is stiffened in preeclampsia has less been investigated. This study was aimed to characterize in vivo the carotid arterial intima-media thickness (IMT) and mechanical properties in women with preeclampsia by employing a radio-frequency ultrasound technique. METHODS: Twenty-two preeclampsia women and 28 age- and gestational-week ...
Prabhu Somnath J - - 2013
BACKGROUND: Percutaneous arterial closure devices have increasingly entered clinical practice to assist in achieving femoral arterial access site hemostasis. Prior studies have demonstrated the safety and efficacy of several arterial closure devices in adults. OBJECTIVE: To evaluate the efficacy of using an arterial closure device in children. MATERIALS AND METHODS: ...
Canaud Ludovic - - 2013
OBJECTIVE: Poor aortic arch apposition increases the risk of technical failure after thoracic endovascular repair. The aim of this study was to assess the conformability of the latest generation of thoracic stent grafts in relation to the degree of device oversizing and aortic arch angulation. METHODS: A benchtop pulsatile flow ...
Bredahl K - - 2013
OBJECTIVE: No standardised ultrasound procedure to obtain reliable growth estimates for abdominal aortic aneurysms (AAA) is currently available. We investigated the feasibility and reproducibility of a novel approach controlling for a combination of vessel wall delineation and cardiac cycle variation. DESIGN: Prospective comparative study. METHODS: Consecutive patients (N = 27) with an ...
Arkudas Andreas A Department of Plastic and Hand Surgery, University of Erlangen Medical Center, Erlangen, Germany. - - 2013
In this study, the angiogenetic effect of sintered 45S5 Bioglass® was quantitatively assessed for the first time in the arteriovenous loop (AVL) model. An AVL was created by interposition of a venous graft from the contralateral side between the femoral artery and vein in the medial thigh of eight rats. ...
Gutierrez Jose - - 2013
BACKGROUND AND PURPOSE: Dolichoectasia (DE) is a vasculopathy that consists of abnormal elongation and dilatation of arteries. The objective of this study is to evaluate the frequency of DE in an unselected population and assess different diagnostic methods. METHODS: The Northern Manhattan Study is a multiethnic population based cohort of ...
Tachibana Kazutoshi - - 2013
In mitral valvuloplasty, the saline injection test is commonly employed. However, discrepancies in regurgitation between the naked eye findings during the saline injection test and the postoperative echocardiographical findings are noted. Here, we describe a technique that allows direct transatrial evaluation of the valve in the fully loaded, beating heart ...
Bhatla Puneet - - 2013
Thoracic aortic disease is a known cause of aortic dilatation and poses significant risk of aortic dissection and rupture. Serial assessment of aortic root dimensions is traditionally performed using echocardiography, which is limited with older age and following surgery, due to poor acoustic windows. Although diastolic measurements are utilized as ...
Choi Hyo Won - - 2013
In vivo, the position of the conductance catheter to measure vessel lumen cross-sectional area may vary depending on where the conductance catheter is deployed in the complex anatomical geometry of arteries, including branches, bifurcations, or curvatures. The objective here is to determine how such geometric variations affect the CSA estimates ...
Mahajan Amit K AK University of Chicago Medical Center, Chicago, IL 60637, USA. - - 2013
Alveolar-pleural fistulas causing persistent air leaks are conditions associated with prolonged hospital courses, high morbidity, and possibly increased mortality. Intrabronchial valves serve as a noninvasive therapeutic option for the closure of alveolar-pleural fistulas. The present review describes a brief history of, and indications for, the placement of intrabronchial valves in ...
Rachev Alexander - - 2013
Arteries manifest a remodeling response to long-term alterations in arterial pressure and blood flow by changing geometry, structure, and composition through processes driven by perturbations of the local stresses in the vascular wall from their baseline values. The objective of this study is twofold-to develop a general method for calculating ...
Hsu Shih-Wei - - 2013
OBJECTIVE: Deployment of a Neuroform microstent (NFM) within acutely angled geometry may result in substantial deformations. This in vitro study was conducted to validate a novel alternative technique, consisting of intentional deployment of a NFM straight on into a terminus aneurysm, by assessing the mechanics, feasibility, and stability of the ...
Machida H - - 2013
BACKGROUND AND PURPOSE:Improved CTA delineation of arteries and unruptured aneurysms is clinically desired in the posterior fossa. We present a novel model-based iterative reconstruction that models system statistics and optics to improve CT image quality. We investigated the utility of MBIR for improving delineation of arteries in the posterior fossa ...
Petzoldt Martin M Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany. - - 2013
Transcardiopulmonary thermodilution (TPTD, SVTD) as well as calibrated (SVPC CAL) and uncalibrated (SVPC UNCAL) arterial pulse contour analysis (PC) are increasingly promoted as less-invasive technologies to measure stroke volume (SV) but their reliability in aortic valve disease was unknown. The objective of this prospective study was to investigate the validity ...
Wang Charlie - - 2013
OBJECTIVE: A study on factors of material costs in endovascular coil embolization has not been previously reported. The aim of this study was to assess the effect of aneurysm size and other factors on implanted coil costs. METHODS: Implanted coil costs were retrospectively obtained for all 387 consecutive aneurysm coiling ...
Yang Xiaoyuan - - 2013
The development of a small diameter (≤5 mm) arterial prosthesis requires the appropriate selection of materials, structure and fabrication method so as to provide adequate mechanical properties, superior biocompatibility and precise control over the diameter. In this study, 100% polyester, 100% silk fibroin and a combination of both yarns were ...
Tanemura Hiroshi - - 2013
Stent-assisted coil embolization has enabled the endovascular treatment of wide-necked cerebral aneurysms. Moreover, recent reports demonstrated that stent-assisted coil embolization was associated with a significant decrease in angiographic recurrences of coiled cerebral aneurysms. One of the possible explanations for this adjunctive effect of stent-assisted coil embolization is changes in the ...
Mohd Rizal M Y - - 2013
Dieulafoy's lesion is one of an unusual cause of upper gastrointestinal bleeding (U GIB). Endoscopic intervention has always been a preferred non-surgical method in treating UGIB including bleeding from Dieulafoy's lesion. Owing to recent advances in angiography, arterial embolization has become a popular alternative in non- variceal UGIB especially in ...
Prescott-Focht Julia A - - 2013
Advances in computed tomography (CT) scanners and electrocardiographic gating techniques have resulted in superior image quality of the ascending aorta and increased the use of CT angiography for evaluating the postoperative ascending aorta. Several abnormalities of the ascending aorta and aortic arch often require surgery, and various open techniques may ...
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