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https://www.readbyqxmd.com/read/28641360/-strategies-on-the-treatment-of-nerve-injuries-accompanied-by-severe-soft-tissue-damage-consensus-statement-of-the-german-speaking-society-for-microsurgery-of-peripheral-nerves-and-vessels
#1
Leila Harhaus, Christoph Hirche, Riccardo E Giunta, Oskar Aszmann, Frank Siemers, U Kneser, Marcus Lehnhardt
Nerve injuries with severe soft tissue damage are rare and demand a complex and individualized treatment approach, in order to limit medical and socioeconomic consequences. Since uniform systematic evidence so far is lacking, inconsistent therapy standards are implemented depending on individual experiences and background of respective microsurgeons.In order to provide best conditions for further healing, basic expert consensus statements were developed in a workshop on the 38th Annual Meeting of the German-speaking Community for Microsurgery of the Peripheral Nerves and Vessels (DAM)...
June 22, 2017: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
https://www.readbyqxmd.com/read/28641275/a-case-series-of-surgically-diagnosed-idiopathic-aortitis-in-a-canadian-centre-a-retrospective-study
#2
Diane L Murzin, Eric C Belanger, John P Veinot, Nataliya Milman
BACKGROUND: Idiopathic aortitis became recognized relatively recently, and the body of knowledge concerning this condition is scarce. We aimed to determine the frequency of idiopathic aortitis in aortic specimens, the clinical, laboratory and radiologic characteristics at diagnosis and during follow-up, and the approach to investigation, treatment and monitoring taken by the treating physicians. METHODS: We identified cases of aortitis diagnosed on pathological specimens of the aorta between Jan...
June 19, 2017: CMAJ Open
https://www.readbyqxmd.com/read/28641266/an-approach-to-identifying-phenomena-accompanying-micro-and-nanoparticles-in-contact-with-irregular-vessel-walls
#3
K Talaska, A Ferreira
OBJECTIVE: The objective of this manuscript is to present the method for determining the nature and values of the forces needed to set micro and nanoparticles sitting immobile at the blood vessel wall in motion. METHODS: The problem was tackled in two ways. Microparticles were examined as objects coming into contact with the wall with the actual large arteriole-type vessel structure. The forces acting on microparticles 10 μm, 30 μm and 50 μm in diameter were determined: drag force FD, lift force FL, electrostatic force FE and gravity force FG...
June 19, 2017: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/28641018/three-dimensional-imaging-of-transparent-tissues-via-metal-nanoparticle-labeling
#4
Abdullah Muhammad Syed, Shrey Sindhwani, Stefan Wilhelm, Benjamin R Kingston, Dennis S W Lee, Jennifer L Gommerman, Warren C W Chan
Chemical probes are key components of the bioimaging toolbox as they label biomolecules in cells and tissues. The new challenge in bioimaging is to design chemical probes for 3-Dimensional (3D) tissue imaging. Here, we discovered that the scattering of metal nanoparticles can provide imaging contrast in intact tissues in 3D. The nanoparticles can act as a template for chemically growing a metal layer to further enhance the scattering signal. The use of chemically-grown nanoparticles in whole tissues can amplify the scattering to produce a 1...
June 22, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28640982/mechanisms-of-sphingosine-1-phosphate-mediated-vasoconstriction-of-rat-afferent-arterioles
#5
Zhengrong Guan, Fuchenchu Wang, Xiangqin Cui, Edward W Inscho
AIM: Sphingosine-1-phosphate (S1P) influences resistance vessel function and is implicated in renal pathological processes. Previous studies revealed that S1P evoked potent vasoconstriction of the preglomerular microvasculature, but the underlying mechanisms remain incompletely defined. We postulated that S1P-mediated preglomerular microvascular vasoconstriction involves activation of voltage-dependent L-type calcium channels (L-VDCC) and the rho/rho kinase pathway. METHODS: Afferent arteriolar reactivity was assessed in vitro using the blood-perfused rat juxtamedullary nephron preparation and diameter was measured during exposure to physiological and pharmacological agents...
June 22, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28640847/heart-rate-lowering-treatment-leads-to-a-reduction-in-vulnerable-plaque-features-in-atherosclerotic-rabbits
#6
Raf H M van Hoof, Evelien Hermeling, Judith C Sluimer, Julie Salzmann, Arnold P G Hoeks, Jérôme Roussel, Mat J A P Daemen, Harry Struijker-Boudier, Joachim E Wildberger, Sylvia Heeneman, M Eline Kooi
OBJECTIVE: To investigate the effect of a heart rate (HR) lowering agent (Ivabradine) on features of atherosclerotic plaque vulnerability with magnetic resonance imaging (MRI), ultrasound imaging, and histology. APPROACH AND RESULTS: Atherosclerosis was induced in the abdominal aorta of 19 rabbits. Nine rabbits were treated with Ivabradine (17 mg/kg/day) during the entire study period. At week 14, imaging was performed. Plaque size was quantified on contrast-enhanced T1-weighted MR images...
2017: PloS One
https://www.readbyqxmd.com/read/28640778/a-cohort-study-of-blunt-cerebrovascular-injury-screening-in-children-are-they-just-little-adults
#7
Mackenzie R Cook, Cordelie E Witt, Robert H Bonow, Eileen M Bulger, Ken F Linnau, Saman Arbabi, Bryce R H Robinson, Joseph Cuschieri
BACKGROUND: Blunt cerebrovascular injuries (BCVI) are rare with nonspecific predictors, making optimal screening critical. Radiation concerns magnify these issues in children. The Eastern Association for the Surgery of Trauma (EAST) criteria, the Utah score (US) and the Denver criteria (DC) have been advocated for pediatric BCVI screening, though direct comparison is lacking. We hypothesized that current screening guidelines inaccurately identify pediatric BCVI. METHODS: This was a retrospective cohort study of pediatric trauma patients treated from 2005-2015 with radiographically confirmed BCVI...
June 20, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28640625/dust-effects-on-nucleation-kinetics-and-nanoparticle-product-size-distributions-illustrative-case-study-of-a-prototype-ir-0-n-transition-metal-nanoparticle-formation-system
#8
Saim Özkar, Richard G Finke
The question is addressed if dust is kinetically important in the nucleation and growth of Ir(0)n nanoparticles formed from [Bu4N]5Na3(1,5-COD)Ir(I)·P2W15Nb3O62 (hereafter [(COD)Ir·POM](8-)), reduced by H2 in propylene carbonate solvent. Following a concise review of the (often-neglected) literature addressing dust in nucleation phenomena dating back to the late 1800s, the nucleation and growth kinetics of the [(COD)Ir·POM](8-) precatalyst system are examined for the effects of 0.2 μm microfiltration of the solvent and precatalyst solution, of rinsing the glassware with that microfiltered solvent, of silanizing the glass reaction vessel, for the addition of <0...
June 22, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28637341/assessment-of-workers-exposure-to-grain-dust-and-bioaerosols-during-the-loading-of-vessels-hold-an-example-at-a-port-in-the-province-of-qu%C3%A3-bec
#9
Geneviève Marchand, Marie Gardette, Kiet Nguyen, Valérie Amano, Eve Neesham-Grenon, Maximilien Debia
Longshoremen are exposed to large amounts of grain dust while loading of grain into the holds of vessels. Grain dust inhalation has been linked to respiratory diseases such as chronic bronchitis, hypersensitivity, pneumonitis, and toxic pneumonitis. Our objective was to characterize the exposure of longshoremen to inhalable and total dust, endotoxins, and cultivable bacteria and fungi during the loading of grain in a vessel's hold at the Port of Montreal in order to assess the potential health risks. Sampling campaigns were conducted during the loading of two different types of grain (wheat and corn)...
June 15, 2017: Annals of Work Exposures and Health
https://www.readbyqxmd.com/read/28637196/chronological-change-of-right-ventricle-by-chronic-intermittent-hypoxia-in-mice
#10
Hyung-Ju Cho, Woon Heo, Jung Woo Han, Yong Hyuk Lee, Jin Myung Park, Min Jung Kang, Joo-Heon Yoon, Min Goo Lee, Chang-Hoon Kim, Joo Young Kim
Study Objective: No studies have investigated sequential changes in the heart on MRI, along with observation of functional lung phenotypes and genetics, over the duration of chronic intermittent hypoxia (CIH). We investigated chronological changes in heart and lung phenotypes after CIH using a mouse model to provide new insights into the pathophysiology of sleep apnea-induced cardiovascular disease. Methods: C57BL/6J adult male mice were randomized to 4 weeks or 8 weeks of CIH...
June 20, 2017: Sleep
https://www.readbyqxmd.com/read/28637170/neuroprotective-effect-of-pressure-oriented-flow-regulation-and-ph-stat-management-in-selective-antegrade-brain-perfusion-during-total-aortic-arch-repair
#11
Hisato Ito, Toru Mizumoto, Yasuhiro Sawada, Kazuya Fujinaga, Hironori Tempaku, Yasunori Yamamoto, Katsuhiro Tsutsui, Hideto Shimpo
OBJECTIVES: The aim of this study was to assess the safety and effectiveness of our selective antegrade brain perfusion (SABP) strategy, which is characterized by moderate hypothermic and low-pressure management under pH-stat using a completely closed cardiopulmonary bypass circuit with a single centrifugal pump. METHODS: Forty-nine consecutive patients (median age, 74) underwent total aortic arch replacement using a 4-branched graft. SABP was conducted with individual cannulation in all arch vessels...
June 20, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28636607/three-dimensional-cell-shapes-and-arrangements-in-human-sweat-glands-as-revealed-by-whole-mount-immunostaining
#12
Ryuichiro Kurata, Sugiko Futaki, Itsuko Nakano, Fumitaka Fujita, Atsushi Tanemura, Hiroyuki Murota, Ichiro Katayama, Fumihiro Okada, Kiyotoshi Sekiguchi
Because sweat secretion is facilitated by mechanical contraction of sweat gland structures, understanding their structure-function relationship could lead to more effective treatments for patients with sweat gland disorders such as heat stroke. Conventional histological studies have shown that sweat glands are three-dimensionally coiled tubular structures consisting of ducts and secretory portions, although their detailed structural anatomy remains unclear. To better understand the details of the three-dimensional (3D) coiled structures of sweat glands, a whole-mount staining method was employed to visualize 3D coiled gland structures with sweat gland markers for ductal luminal, ductal basal, secretory luminal, and myoepithelial cells...
2017: PloS One
https://www.readbyqxmd.com/read/28636511/feasibility-of-low-dose-coronary-computed-tomographic-angiography-used-in-atrial-fibrillation-patients
#13
Chenglin Zhao, Mengxi Jiang, Jianxin Liu, Li Gao, Xiaoying Wang
OBJECTIVE: The diagnosis of coronary artery disease (CAD) in atrial fibrillation (AF) patients using coronary computed tomography angiography (CCTA) requires a large exposure dosage or repeated examinations. This study evaluates the feasibility of using low-dose CCTA in the double prospectively ECG-triggered high-pitch spiral acquisition mode (Double Flash Spiral mode). METHODS: Twenty-eight AF patients with suspected CAD were recruited. Double Flash Spiral mode (tube voltage 100 kVp) and iterative reconstruction was used for CCTA examination...
March 21, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28636206/retinal-vascular-injuries-and-intravitreal-human-embryonic-stem-cell-derived-haemangioblasts
#14
Jin-Da Wang, Ying An, Jing-Shang Zhang, Xiu-Hua Wan, Wei Zhang, Robert Lanza, Shi-Jiang Lu, Jost B Jonas, Liang Xu
OBJECTIVE: To investigate whether intravitreally applied haemangioblasts (HB) derived from human embryonic stem cells (hESCs) are helpful for the repair of vascular damage caused in animals by an oxygen-induced retinopathy (OIR), by an induced diabetic retinopathy (DR) or by an induced retinal ischaemia with subsequent reperfusion. METHODS: Human embryonic stem cell-derived HBs were transplanted intravitreally into C57BL/6J mice (OIR model), into male Wistar rats with an induced DR and into male Wistar rats undergoing induced retinal ischaemia with subsequent reperfusion...
June 21, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28635993/head-and-neck-vascular-anomalies-a-multidisciplinary-approach-and-diagnostic-criteria
#15
L Moneghini, V Sangiorgio, D Tosi, G Colletti, F Melchiorre, V Baraldini, D Graziani, R M Alfano, G Vercellio, G Bulfamante
Vascular anomalies represent a heterogeneous group of pathologies of the circulatory system that can affect any type of hematic and /or lymphatic vessel of different diameter or anatomic site. The extreme variability of tissue types and districts involved by these lesions determines a wide heterogeneity of clinical manifestations, resulting in involvement of different medical expertise. In this context, a commonly agreed terminology is crucial for the appropriate evaluation and multidisciplinary management of patients...
March 2017: Pathologica
https://www.readbyqxmd.com/read/28635679/the-role-of-angiogenesis-in-cancer-treatment
#16
REVIEW
Mehdi Rajabi, Shaker A Mousa
A number of anti-angiogenesis drugs have been FDA-approved and are being used in cancer treatment, and a number of other agents are in different stages of clinical development or in preclinical evaluation. However, pharmacologic anti-angiogenesis strategies that arrest tumor progression might not be enough to eradicate tumors. Decreased anti-angiogenesis activity in single mechanism-based anti-angiogenic strategies is due to the redundancy, multiplicity, and development of compensatory mechanism by which blood vessels are remodeled...
June 21, 2017: Biomedicines
https://www.readbyqxmd.com/read/28635138/snake-spectacle-vessel-permeability-to-sodium-fluorescein
#17
Roy W Bellhorn, Ann R Strom, Monica J Motta, John Doval, Michelle G Hawkins, Joanne Paul-Murphy
OBJECTIVE: Assess vascular permeability of the snake spectacle to sodium fluorescein during resting and shedding phases of the ecdysis cycle. ANIMAL STUDIED: Ball python (Python regius). PROCEDURES: The snake was anesthetized, and spectral domain optic coherence tomography was performed prior to angiographic procedures. An electronically controlled digital single-lens reflex camera with a dual-head flash equipped with filters suitable for fluorescein angiography was used to make images...
June 20, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/28634857/computational-modelling-of-cancer-development-and-growth-modelling-at-multiple-scales-and-multiscale-modelling
#18
Zuzanna Szymańska, Maciej Cytowski, Elaine Mitchell, Cicely K Macnamara, Mark A J Chaplain
In this paper, we present two mathematical models related to different aspects and scales of cancer growth. The first model is a stochastic spatiotemporal model of both a synthetic gene regulatory network (the example of a three-gene repressilator is given) and an actual gene regulatory network, the NF-[Formula: see text]B pathway. The second model is a force-based individual-based model of the development of a solid avascular tumour with specific application to tumour cords, i.e. a mass of cancer cells growing around a central blood vessel...
June 20, 2017: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/28634726/connexin-channels-at-the-glio-vascular-interface-gatekeepers-of-the-brain
#19
Marijke De Bock, Luc Leybaert, Christian Giaume
Neuronal survival, electrical signaling and synaptic activity require a well-balanced micro-environment in the central nervous system. This is achieved by the blood-brain barrier (BBB), an endothelial barrier situated in the brain capillaries, that controls near-to-all passage in and out of the brain. The endothelial barrier function is highly dependent on signaling interactions with surrounding glial, neuronal and vascular cells, together forming the neuro-glio-vascular unit. Within this functional unit, connexin (Cx) channels are of utmost importance for intercellular communication between the different cellular compartments...
June 20, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28634641/a-novel-technique-for-ultrasound-guided-central-venous-catheterization-under-short-axis-out-of-plane-approach-stepwise-flashing-with-triangulation
#20
Toshinori Horiuchi, Chie Okuda, Naoko Kurita, Ayako Yamaguchi, Kazuhiko Kitagawa, Masafumi Takeda, Keiichi Sha, Toshihiro Nagahata
In ultrasound-guided central venous catheterization, there is no standard technique either for the needle tip visualization or for the adequate needle angle and entry to the skin with short-axis view under out-of-plane technique. In the present study, we propose a novel technique named "stepwise flashing with triangulation", and the efficacy of this technique is assessed. Before and after a didactic session in which the technique was explained, 12 novice residents were asked to position the needle tip on or into the imitation vessels and to avoid deeper penetration by using an agar tissue phantom with ultrasound guidance...
June 20, 2017: Journal of Anesthesia
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