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https://www.readbyqxmd.com/read/28550589/carbon-dioxide-co2-angiography-as-an-option-for-endovascular-abdominal-aortic-aneurysm-repair-evar-in-patients-with-chronic-kidney-disease-ckd
#1
Chiara De Angelis, Francesco Sardanelli, Matteo Perego, Marco Alì, Francesco Casilli, Luigi Inglese, Giovanni Mauri
To assess feasibility, efficacy and safety of carbon dioxide (CO2) digital subtraction angiography (DSA) to guide endovascular aneurysm repair (EVAR) in a cohort of patients with chronic kidney disease (CKD). After Ethical Committee approval, the records of 13 patients (all male, mean age 74.6 ± 8.0 years) with CKD, who underwent EVAR to exclude an abdominal aortic aneurysm (AAA) under CO2 angiography guidance, were reviewed. The AAA to be excluded had a mean diameter of 52.0 ± 8.0 mm. CO2 angiography was performed by automatic (n = 7) or hand (n = 6) injection...
May 27, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28542109/application-and-interpretation-of-histocompatibility-data-in-pediatric-kidney-transplantation
#2
Hilda E Fernandez
PURPOSE OF REVIEW: Advances in technology to assess immunologic risk in solid organ transplant offer an opportunity to optimize the approach to pediatric deceased donor kidney transplant in the setting of a new allocation system in the United States. RECENT FINDINGS: Degree of human leukocyte antigen (HLA) mismatch, class II HLA mismatch, unacceptable antigens and donor-specific antibody (DSA) detected by solid-phase assays, and epitope matching pretransplant affect pediatric kidney transplant outcomes...
May 24, 2017: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/28542096/modified-dual-energy-algorithm-for-calcified-plaque-removal-evaluation-in-carotid-computed-tomography-angiography-and-comparison-with-digital-subtraction-angiography
#3
Manoj Mannil, Jaychandran Ramachandran, Ilaria Vittoria de Martini, Susanne Wegener, Bernhard Schmidt, Thomas Flohr, Bernhard Krauss, Antonios Valavanis, Hatem Alkadhi, Sebastian Winklhofer
OBJECTIVES: Computed tomography angiography (CTA) is a valuable tool for the assessment of carotid artery stenosis. However, blooming artifacts from calcified plaques might result in an overestimation of the stenosis grade. The aim of this study was to investigate a new dual-energy computed tomography (DECT) technique with a modified 3-material decomposition algorithm for calcium removal in extracranial carotid artery stenosis. MATERIALS AND METHODS: In this retrospective, institutional review board-approved study, 30 calcified carotid plaques in 22 patients (15 men; mean age, 73 ± 10 years) with clinical suspicion of stroke were included...
May 24, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28541658/characterizing-patterned-block-copolymer-thin-films-with-soft-x-rays
#4
Daniel F Sunday, Jiaxing Ren, Christopher D Liman, Lance D Williamson, Roel Gronheid, Paul F Nealey, R Joseph Kline
The directed self-assembly (DSA) of block copolymers (BCPs) is a potential solution for patterning critical features for integrated circuits at future technology nodes. In order for this process to be implemented there needs to be a better understanding of how the template guides the assembly and induces subsurface changes in the lamellar structure. Using a rotational transmission X-ray scattering measurement coupled with soft X-rays to improve contrast between polymer components, the impact of the ratio of the guiding stripe width (W) to the BCP pitch (Lo) was investigated...
May 25, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28541020/application-of-contrast-enhanced-ultrasound-before-inferior-vena-cava-filter-recovery
#5
Ji-Ping Yan, Wei-Qin Li, Zhen-Feng Wang, Bian-Lian Guo
OBJECTIVE: This study aims to investigate the clinical value of contrast-enhanced ultrasound (CEU) before temporary inferior vena cava filter (IVCF) recovery in patients with deep venous thrombosis, in order to provide ultrasound signs for the recovery of IVCF in clinical practice. METHODS: The CEU manifestations of patients with deep vein thrombosis before temporary IVCF recovery were retrospectively analyzed. With the manifestations of digital subtraction angiography (DSA) or results of the surgical recovery of IVCF as the standard, the detection rate of a thrombus in IVCF was compared between conventional ultrasound and CEU; and the role of CEU in detecting complications of IVCF was analyzed...
May 24, 2017: International Angiology: a Journal of the International Union of Angiology
https://www.readbyqxmd.com/read/28540294/management-of-spontaneous-subarachnoid-hemorrhage-patients-with-negative-initial-digital-subtraction-angiogram-findings-conservative-or-aggressive
#6
Liang Xu, Yuanjian Fang, Xudan Shi, Xianyi Chen, Jun Yu, Zeyu Sun, Jianmin Zhang, Jing Xu
Background. The ideal management of SAH patients with negative initial DSA findings remains unresolved. Objective. (i) To present risk factors, clinical courses, and outcomes in different types of SAH patients with negative DSA findings; (ii) to explore the differences of basal vein between aSAH patients and NASAH patients; and (iii) to evaluate the value of repeated DSA for these patients. Methods. All SAH patients with negative initial DSA findings between 2013 and 2015 in our hospital were enrolled and were further categorized as perimesencephalic SAH (PMN-SAH) or nonperimesencephalic SAH (nPMN-SAH)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28529045/influence-of-preoperative-imaging-on-fibula-free-flap-harvesting
#7
R Gryseleyn, M Schlund, P Pigache, T Wojcik, G Raoul, J Ferri
INTRODUCTION: The fibula free flap (FFF) is the gold standard for the reconstruction of large maxillofacial defects. Magnetic resonance angiography (MRA) seems to supersede digital subtraction angiography (DSA) as the reference in preoperative evaluation, being non-invasive and having equivalent diagnostic results. The aim of this study was to assess the impact of preoperative MRA versus DSA on the viability of FFF and its success rate. MATERIAL AND METHODS: A total of 216 patients, who underwent mandibular or maxillary FFF reconstruction from January 1995 to January 2011, were retrospectively included in the study...
May 18, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28522664/non-contrast-enhanced-silent-scan-mr-angiography-of-intracranial-anterior-circulation-aneurysms-treated-with-a-low-profile-visualized-intraluminal-support-device
#8
N Takano, M Suzuki, R Irie, M Yamamoto, K Teranishi, K Yatomi, N Hamasaki, K K Kumamaru, M Hori, H Oishi, S Aoki
BACKGROUND AND PURPOSE: The Low-Profile Visualized Intraluminal Support Device comprises a small-cell nitinol structure and a single-wire braided stent that provides greater metal coverage than previously reported intracranial stents, as well as assumed strong susceptibility artifacts. This study aimed to assess the benefits of non-contrast-enhanced MRA by using a Silent Scan (Silent MRA) for intracranial anterior circulation aneurysms treated with Low-Profile Visualized Intraluminal Support Device stents...
May 18, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28521993/chitosan-oligosaccharides-inhibit-epithelial-cell-migration-through-blockade-of-n-acetylglucosaminyltransferase-v-and-branched-glcnac-structure
#9
Qingsong Xu, Wenjing Wang, Chen Qu, Jianguo Gu, Heng Yin, Zhihao Jia, Linsheng Song, Yuguang Du
Chitosan oligosaccharides (COS) have been shown to regulate various cellular and biological functions. The aim of this study was to investigate the antimetastatic potency of COS and the underlying mechanism. Here, we established a stably N-acetylglucosaminyltransferase V (GnT-V)-overexpressed MCF10A cell line. As expected, GnT-V overexpression greatly promoted cell migration in the transfectants by using wound healing assay. However, the induction in the cell migration was significantly suppressed by an addition of COS...
August 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28516133/transcatheter-arterial-chemoembolization-of-hepatocellular-carcinoma-in-patients-with-celiac-axis-occlusion-using-pancreaticoduodenal-arcade-as-a-challenging-alternative-route
#10
Noha M Attia, Moustafa H M Othman
INTRODUCTION: Celiac axis occlusion is a challenging condition when catheterization of the hepatic artery is required for chemoembolization of hepatocellular carcinoma (HCC). As a result, the hepatic artery has to be catheterized through the pancreaticoduodenal arcades (PDA) and the gastroduodenal artery (GDA) from the superior mesenteric artery (SMA) which is a tortuous course with acute angles and small caliber branches. OBJECTIVE: To assess new techniques for facilitating catheterization of the tortuous PDA and the GDA to reach the proper hepatic artery (PHA) and tumor-feeding branches in patients with celiac axis occlusion undergoing chemoembolization of HCC...
2017: European Journal of Radiology Open
https://www.readbyqxmd.com/read/28511714/assessing-equity-in-the-distribution-of-high-technology-medical-equipment-in-guangxi-evidence-from-an-ethnic-minority-region-in-southern-china
#11
Jian Sun, Hai Gu, Qiulin Wen, Hongye Luo
BACKGROUND: High-technology medical equipment (HTME) are important health resources. However, there is unequal distribution of these equipment in favor of metropolis and well equipped health facilities. This study sought to examine the equity gaps in the distribution of HTME in Guangxi. The results of this study could shed light on the future HTME allocation in Guangxi Zhuang Autonomous Region. METHODS: Data related to HTME was sourced from a general investigation of all the hospitals of Guangxi...
May 16, 2017: International Journal for Equity in Health
https://www.readbyqxmd.com/read/28511172/donor-specific-anti-human-leukocyte-antigens-antibodies-acute-rejection-renal-function-and-histology-in-kidney-transplant-recipients-receiving-tacrolimus-and-everolimus
#12
Alexandra Ferreira, Claudia Felipe, Marina Cristelli, Laila Viana, Geovana Basso, Suelen Stopa, Juliana Mansur, Mayara Ivani, Adrieli Bessa, Priscila Ruppel, Wilson Aguiar, Erika Campos, Maria Gerbase-DeLima, Henrique Proença, Helio Tedesco-Silva, José Medina-Pestana
BACKGROUND: This analysis compared efficacy, renal function, and histology in kidney transplant recipients receiving tacrolimus (TAC) combined with everolimus (EVR) or mycophenolate (MPS). METHODS: This was a retrospective analysis from a randomized trial in kidney transplant recipients who received a single 3 mg/kg dose of rabbit antithymocyte globulin (r-ATG), TAC, EVR, and prednisone (PRED; r-ATG/EVR, n = 85), basiliximab (BAS), TAC, EVR, and PRED (BAS/EVR, n = 102) or BAS, TAC, MPS, and PRED (BAS/MPS, n = 101)...
May 17, 2017: American Journal of Nephrology
https://www.readbyqxmd.com/read/28509611/efficacy-of-high-resolution-cone-beam-ct-in-the-evaluation-of-perforators-in-vertebral-artery-dissection
#13
Kenji Shimada, Michihiro Tanaka, Keisuke Kadooka, Hiromu Hadeishi
Introduction A major complication of internal coil trapping for vertebral artery dissection (VAD) is medullary infarction associated with perforator occlusion. Currently, higher spatial resolution imaging can be obtained with high-resolution cone-beam computed tomography (VASO CT), and the efficacy of perforator visualization adjacent to VAD was examined. Methods Eight patients who underwent internal coil trapping or stent-supported coil embolization underwent VASO CT to evaluate perforators around VAD. Visualization of perforators was compared with conventional digital subtraction angiography (DSA) and three-dimensional rotational angiography (3D-RA)...
January 1, 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28504957/post-pancreaticoduodenectomy-hemorrhage-dsa-diagnosis-and-endovascular-treatment
#14
Tan-Yang Zhou, Jun-Hui Sun, Yue-Lin Zhang, Guan-Hui Zhou, Chun-Hui Nie, Tong-Yin Zhu, Sheng-Qun Chen, Bao-Quan Wang, Wei-Lin Wang, Shu-Sen Zheng
OBJECTIVE: To explore the diagnostic value of digital subtraction angiography (DSA) and the effectiveness of endovascular treatment for a post-pancreaticoduodenectomy hemorrhage (PPH). RESULTS: During the DSA examination, positive results were found in 29 patients, yielding a positive rate of 69.0%. The manifestations of the DSA examination included contrast medium extravasation, pseudoaneurysm, and artery walls coarse. All 29 patients with positive results underwent endovascular treatment, including transartery embolization (TAE) in 28 patients and covered stents placement in one patient...
April 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28500366/comparison-of-3d-magnetic-resonance-imaging-and-digital-subtraction-angiography-for-intracranial-artery-stenosis
#15
Ji Eun Park, Seung Chai Jung, Sang Hun Lee, Ji Young Jeon, Ji Ye Lee, Ho Sung Kim, Choong-Gon Choi, Sang Joon Kim, Deok Hee Lee, Seon-Ok Kim, Sun U Kwon, Dong-Wha Kang, Jong S Kim
OBJECTIVES: To compare three-dimensional high-resolution magnetic resonance imaging (3D HR-MRI) and digital subtraction angiography (DSA) for diagnosing and evaluating stenosis in the entire circle of Willis. METHODS: The study included 516 intracranial arteries from 43 patients with intracranial artery stenosis (ICAS) who underwent both 3D HR-MRI and DSA within 1 month. Two readers independently diagnosed atherosclerosis, dissection, moyamoya disease and vasculitis, rated their diagnostic confidence for each vessel and measured the luminal diameters...
May 12, 2017: European Radiology
https://www.readbyqxmd.com/read/28494642/normal-anatomy-and-variations-in-the-confluence-of-sinuses-using-digital-subtraction-angiography
#16
Yaqin Cheng, William A Li, Xingjuan Fan, Xiaohua Li, Jian Chen, Yan Wu, Ran Meng, Xunming Ji
OBJECTIVES: The configuration of the confluence of sinuses differs not only between individuals, but also between the two brain hemispheres, making the anatomical classification of this region difficult. In this study, we evaluated the anatomy of the confluence of sinuses and ascertained the accuracy and usefulness of digital subtraction angiography (DSA) in the evaluation of cerebral veins. METHODS: Bilateral carotid and vertebral artery angiographies were performed in 500 adult patients to evaluate the anatomy of the confluence of sinuses and contributory venous sinuses...
June 2017: Neurological Research
https://www.readbyqxmd.com/read/28494364/novel-integrated-electrodialysis-electro-oxidation-process-for-the-efficient-degradation-of-2-4-dichlorophenoxyacetic-acid
#17
A Raschitor, J Llanos, P Cañizares, M A Rodrigo
This work presents a novel approach of wastewater treatment technology that consists of a combined electrodialysis/electro-oxidation process, specially designed to allow increasing the efficiency in the oxidation of ionic organic pollutants contained in diluted waste. Respect to conventional electrolysis, the pollutant is simultaneously concentrated and oxidized, enhancing the performance of the cell due to the higher concentration achieved in the nearness of the anode. A proof of concept is tested with the ionic pesticide 2,4-D (2,4-dichlorophenoxyacetic acid) and results show that the efficiency of this new technology overcomes that electrolysis by more than double, regardless the supporting electrolyte used (either NaCl or Na2SO4)...
May 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28493630/clinical-outcomes-of-abo-and-hla-incompatible-kidney-transplantation-a-nationwide-cohort-study
#18
Eun Jeong Ko, Ji Hyun Yu, Chul Woo Yang, Byung Ha Chung
This was a nationwide cohort study to investigate the impact of anti-A/B and donor-specific anti-HLA (HLA-DSA) antibodies on the clinical outcomes in kidney transplant recipients (KTRs). We classified a total of 1,964 KTRs into four groups: transplants from ABO-incompatible donors (ABOi, n=248); transplants in recipients with HLA-DSA (HLAi, n=144); transplants from combined ABOi and HLAi donors (ABOi+HLAi, n=31); and a control group for whom neither ABOi nor HLAi was applicable (CONT, n=1541). We compared the incidence of biopsy proven acute rejection (BPAR), allograft and patient survival rates...
May 11, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28490351/transcranial-doppler-sonography-is-not-a-valid-diagnostic-tool-for-detection-of-basilar-artery-stenosis-or-in-stent-restenosis-a-retrospective-diagnostic-study
#19
Woori Koh, Kai Kallenberg, André Karch, Tobias Frank, Michael Knauth, Mathias Bähr, Jan Liman
BACKGROUND: There are contradictory reports concerning the validity of transcranial sonography (TCD and TCCS) for examinations of the basilar artery. Here we investigated sensitivity and specificity of transcranial sonography for the detection of basilar artery stenosis and in-stent-restenosis compared to cerebral angiography. METHODS: We analyzed data of 104 examinations of the basilar artery. The association between sonographic peak systolic velocity (PSV) and degree of stenosis obtained by cerebral angiography was evaluated applying Spearman's correlation coefficient...
May 11, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28488106/treatment-evaluation-of-flow-limiting-stenoses-of-the-superficial-femoral-and-popliteal-artery-by-parametric-color-coding-analysis-of-digital-subtraction-angiography-series
#20
Michael Kostrzewa, Kerim Kara, Lothar Pilz, Hannelore Mueller-Muertz, Nils Rathmann, Stefan O Schoenberg, Steffen J Diehl
PURPOSE: To evaluate the hemodynamic effect of percutaneous transluminal intervention (PTI) on stenosis of the superficial femoral (SFA) and popliteal arteries (PA) using time-density curves (TDCs) derived from digital subtraction angiography (DSA) series in correlation with ultrasound peak systolic velocity ratio (PSVR) and ankle brachial index (ABI). MATERIALS AND METHODS: DSA series of SFA or PA of patients with symptomatic peripheral arterial occlusive disease was obtained with a flat-panel angiography system with intention-to-treat...
May 9, 2017: Cardiovascular and Interventional Radiology
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