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https://www.readbyqxmd.com/read/28329415/the-hand-hygiene-compliance-of-student-nurses-during-clinical-placements
#1
Jorun Saetre Sundal, Anne Grethe Aune, Eline Storvig, Jenny Kristin Aasland, Kaja Linn Fjeldsaeter, Kirsti Torjuul
AIMS AND OBJECTIVES: To observe student nurses' overall and moment-specific hand hygiene compliance during clinical placement. BACKGROUND: Hand hygiene is the single most important measure to prevent healthcare-associated infections (HAIs). However, research has shown low compliance among healthcare workers. During clinical placements, student nurses perform various nursing tasks and procedures to a large number of patients, requiring extensive patient contact. It is crucial that they practice correct hand hygiene in order to prevent healthcare-associated infections...
March 22, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/28328191/enhancing-tumor-penetration-of-nanomedicines
#2
Qingxue Sun, Tarun Ojha, Fabian Kiessling, Twan Lammers, Yang Shi
Tumor-targeted nanomedicines have been extensively applied to alter the drawbacks and enhance the efficacy of chemotherapeutics. Despite the large number of preclinical nanomedicine studies showing initial success, their therapeutic benefit in the clinic has been rather modest, which is partially due to the inefficient tumor penetration caused by tumor microenvironment (high density of cells and extracellular matrix, increased interstitial fluid pressure). Furthermore, tumor penetration of nanomedicines is significantly influenced by physicochemical characteristics such as size, surface chemistry and shape...
March 22, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28328069/autophagy-maintains-the-integrity-of-endothelial-barrier-in-lps-induced-lung-injury
#3
Dan Zhang, Jian Zhou, Le Chi Ye, Jing Li, Zhenzhou Wu, Yuping Li, Chichi Li
Understanding the role and underlying regulation mechanism of autophagy in lipopolysaccharide-induced lung injury (LPS-LI) may provide potentially new pharmacological targets for treatment of acute lung injury. The aim of this study was to investigate the functional significance of autophagy in LPS-LI. The autophagy of human pulmonary microvascular endothelial cells (HPMVECs) and mice was inhibited before they were challenged with LPS. In vitro, permeability, vitality and the lactate dehydrogenase (LDH) release rate of the cells were detected, the zonula occluden-1 (ZO-1) expression and the stress fiber formation were determined...
March 22, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28327771/the-roles-of-surface-chemistry-dissolution-rate-and-delivered-dose-in-the-cytotoxicity-of-copper-nanoparticles
#4
Miao Shi, Karen L de Mesy Bentley, Goutam Palui, Hedi Mattoussi, Alison Elder, Hong Yang
The understanding of nanoparticle (NP) cytotoxicity is challenging because of incomplete information about physicochemical changes particles undergo once they come into contact with biological fluids. It is therefore essential to characterize changes in NP properties to better understand their biological fate and effects in mammalian cells. In this paper, we present a study on the effect of particle surface oxidation and dissolution rates of Cu NPs. Particle dissolution, cell-associated Cu doses, and oxidative stress responses in A549 luciferase reporter cells were examined for Cu NPs modified with mercaptocarboxylic acids with different carbon chain lengths and a thiotic acid appended-PEG ligand (TA)...
March 22, 2017: Nanoscale
https://www.readbyqxmd.com/read/28326170/obstacles-and-opportunities-in-the-functional-analysis-of-extracellular-vesicle-rna-an-isev-position-paper
#5
Bogdan Mateescu, Emma J K Kowal, Bas W M van Balkom, Sabine Bartel, Suvendra N Bhattacharyya, Edit I Buzás, Amy H Buck, Paola de Candia, Franklin W N Chow, Saumya Das, Tom A P Driedonks, Lola Fernández-Messina, Franziska Haderk, Andrew F Hill, Jennifer C Jones, Kendall R Van Keuren-Jensen, Charles P Lai, Cecilia Lässer, Italia di Liegro, Taral R Lunavat, Magdalena J Lorenowicz, Sybren L N Maas, Imre Mäger, Maria Mittelbrunn, Stefan Momma, Kamalika Mukherjee, Muhammed Nawaz, D Michiel Pegtel, Michael W Pfaffl, Raymond M Schiffelers, Hidetoshi Tahara, Clotilde Théry, Juan Pablo Tosar, Marca H M Wauben, Kenneth W Witwer, Esther N M Nolte-'t Hoen
The release of RNA-containing extracellular vesicles (EV) into the extracellular milieu has been demonstrated in a multitude of different in vitro cell systems and in a variety of body fluids. RNA-containing EV are in the limelight for their capacity to communicate genetically encoded messages to other cells, their suitability as candidate biomarkers for diseases, and their use as therapeutic agents. Although EV-RNA has attracted enormous interest from basic researchers, clinicians, and industry, we currently have limited knowledge on which mechanisms drive and regulate RNA incorporation into EV and on how RNA-encoded messages affect signalling processes in EV-targeted cells...
2017: Journal of Extracellular Vesicles
https://www.readbyqxmd.com/read/28324187/frontal-burr-hole-approach-for-neuroendoscopic-resection-of-craniopharyngioma-with-the-nico-myriad-device-report-of-two-cases
#6
Reilin J Moore, Andrea Scherer, Daniel H Fulkerson
OBJECTIVE: Craniopharyngiomas are challenging tumors to resect due to their deep location and proximity to vital structures. The perceived benefit of gross total resection may be tempered by the possibility of permanent disability. Minimally invasive techniques may reduce surgical morbidity while still allowing effective resection. The authors describe their initial experience with a neuroendoscopic transcortical, transventricular approach to two craniopharyngiomas. The surgeries were performed through a right frontal burr hole using the NICO Myriad, a side-cutting, aspiration device that fits through the working channel of a standard neuroendoscope...
March 21, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28323821/comparing-resting-state-fmri-de-noising-approaches-using-multi-and-single-echo-acquisitions
#7
Ottavia Dipasquale, Arjun Sethi, Maria Marcella Laganà, Francesca Baglio, Giuseppe Baselli, Prantik Kundu, Neil A Harrison, Mara Cercignani
Artifact removal in resting state fMRI (rfMRI) data remains a serious challenge, with even subtle head motion undermining reliability and reproducibility. Here we compared some of the most popular single-echo de-noising methods-regression of Motion parameters, White matter and Cerebrospinal fluid signals (MWC method), FMRIB's ICA-based X-noiseifier (FIX) and ICA-based Automatic Removal Of Motion Artifacts (ICA-AROMA)-with a multi-echo approach (ME-ICA) that exploits the linear dependency of BOLD on the echo time...
2017: PloS One
https://www.readbyqxmd.com/read/28323719/passive-leg-raising-for-assessment-of-volume-responsiveness-a-review
#8
Jaume Mesquida, Guillem Gruartmoner, Ricard Ferrer
PURPOSE OF REVIEW: To evaluate the existing evidence on the passive leg raising (PLR) test for fluid responsiveness prediction. RECENT FINDINGS: It has been well established that either insufficient or excessive fluid administration derives in worse outcomes in critically ill patients, highlighting that a more accurate assessment of fluid management is required. Accordingly, several cardiovascular indices have been tested to improve our ability to predict patients' response to fluid loading at the bedside, the so-called functional hemodynamic monitoring...
March 20, 2017: Current Opinion in Critical Care
https://www.readbyqxmd.com/read/28322517/materials-for-microfluidic-immunoassays-a-review
#9
REVIEW
Lei Mou, Xingyu Jiang
Conventional immunoassays suffer from at least one of these following limitations: long processing time, high costs, poor user-friendliness, technical complexity, poor sensitivity and specificity. Microfluidics, a technology characterized by the engineered manipulation of fluids in channels with characteristic lengthscale of tens of micrometers, has shown considerable promise for improving immunoassays that could overcome these limitations in medical diagnostics and biology research. The combination of microfluidics and immunoassay can detect biomarkers with faster assay time, reduced volumes of reagents, lower power requirements, and higher levels of integration and automation compared to traditional approaches...
March 21, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28322439/modeling-multidimensional-and-multispecies-biofilms-in-porous-media
#10
Youneng Tang, Haihu Liu
Modeling multidimensional and multispecies biofilm in porous media at the pore scale is challenging due to the need to simultaneously track the microbial community in the biofilms and the interfaces between the biofilms and the fluid. Therefore, researchers usually assume that the model has only one dimension in space or has only one microbial species. This work uses bioremediation of U(VI)-contaminated groundwater as the context to develop a two-dimensional and multispecies biofilm model. The model simulates the transverse mixing zone in which U(VI) is mixed with propionate, a nutrient externally supplied to stimulate the growth of microorganisms...
March 21, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28322433/a-9-pool-metabolic-structured-kinetic-model-describing-days-to-seconds-dynamics-of-growth-and-product-formation-by-penicillium-chrysogenum
#11
Wenjun Tang, Amit T Deshmukh, Cees Haringa, Guan Wang, Walter van Gulik, Wouter van Winden, Matthias Reuss, Joseph J Heijnen, Jianye Xia, Ju Chu, Henk J Noorman
A powerful approach for the optimization of industrial bioprocesses is to perform detailed simulations integrating large scale computational fluid dynamics (CFD) and cellular reaction dynamics (CRD). However, complex metabolic kinetic models containing a large number of equations pose formidable challenges in CFD-CRD coupling and computation time afterward. This necessitates to formulate a relatively simple but yet representative model structure. Such a kinetic model should be able to reproduce metabolic responses for short-term (mixing time scale of tens of seconds) and long-term (fed-batch cultivation of hours/days) dynamics in industrial bioprocesses...
March 21, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28321928/eus-evaluation-for-pancreatic-cysts-necessity-or-overkill
#12
REVIEW
Nonthalee Pausawasdi, Thawee Ratanachu-Ek
Incidental pancreatic cysts have been gradually more recognized in clinical practice due to an increased use of transabdominal ultrasound, computed tomography (CT) and magnetic resonance imaging (MRI). These lesions consist of inflammatory cysts (pseudocysts) and pancreatic cystic neoplasms (PCNs) which have been classified as benign, pre-malignant and malignant. The diagnosis and management strategy of incidentally discovered pancreatic cysts can be challenging as the majority of them are PCNs and CT or MRI alone may not be sufficient to provide an accurate diagnosis...
March 21, 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28320755/ciliary-mechanisms-of-cyst-formation-in-polycystic-kidney-disease
#13
Ming Ma, Anna-Rachel Gallagher, Stefan Somlo
Autosomal-dominant polycystic kidney disease (ADPKD) is a disease of defective tissue homeostasis resulting in active remodeling of nephrons and bile ducts to form fluid-filled sacs called cysts. The causal genes PKD1 and PKD2 encode transmembrane proteins polycystin 1 (PC1) and polycystin 2 (PC2), respectively. Together, the polycystins localize to the solitary primary cilium that protrudes from the apical surface of most kidney tubule cells and is thought to function as a privileged compartment that the cell uses for signal integration of sensory inputs...
March 20, 2017: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/28320169/probable-zika-virus-associated-guillain-barr%C3%A3-syndrome-challenges-with-clinico-laboratory-diagnosis
#14
Eliza Miller, Zoe Becker, Daniel Shalev, Christopher T Lee, Comana Cioroiu, Kiran Thakur
A 55year old woman in New York City presented in May 2016 with progressive weakness, ataxia, paresthesia, and areflexia, shortly after returning from the Dominican Republic. Lumbar puncture revealed cytoalbuminological dissociation. Due to her recent travel, Zika-associated Guillain Barré syndrome (GBS) was suspected and she underwent evaluation for recent flavivirus exposure. Zika virus RNA was not detected in serum, but Zika virus immunoglobulin M (IgM) was detected in both serum and cerebrospinal fluid...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28320151/takotsubo-cardiomyopathy-in-amyotrophic-lateral-sclerosis
#15
Seok-Jin Choi, Yoon-Ho Hong, Je-Young Shin, Byung-Nam Yoon, Sung-Yeon Sohn, Chan Soon Park, Jung-Joon Sung
OBJECTIVE: To investigate the frequency, features, and prognosis of takotsubo cardiomyopathy (TTC) in patients with amyotrophic lateral sclerosis (ALS). METHODS: We reviewed detailed clinical, laboratory, and cardiovascular data from 64 ALS patients (38 men and 26 women) who underwent echocardiographic evaluation for various reasons at a single referral center between January 2011 and December 2015. RESULTS: TTC was diagnosed in 9 ALS patients (4 men and 5 women)...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28319530/oral-chemical-burns-reported-to-the-poisons-information-centre-in-erfurt-germany-from-1997-to-2014
#16
Juliane Nehrlich, Hans-Peter Klöcking, Helmut Hentschel, Amelie Lupp
Devastating oral burns often followed by lifelong complications can result from ingestion of caustic substances. However, although being one of the most challenging situations in clinical practice, literature data on the epidemiology of oral burns are still scarce. Retrospective analysis of all cases of oral burns after ingestion of corrosive substances reported to the Poisons Information Centre in Erfurt, Germany, from 1997 to 2014 was performed. In total, 482 calls because of oral burns were registered, with no change in the numbers of cases during the years...
March 13, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28318267/magnetic-microlassos-for-reversible-cargo-capture-transport-and-release
#17
Tao Yang, Tonguc Onur Tasci, Keith B Neeves, Ning Wu, David W M Marr
Microbot propulsion has seen increasing interest in recent years as artificial methods that overcome the well-established reversible and challenging nature of microscale fluid mechanics. While controlled movement is an important feature of microbot action, many envisioned applications also involve cargo transport where microbots must be able to load and unload contents on command while tolerating complex solution chemistry. Here we introduce a physical method that uses flexible and linked superparamagnetic colloidal chains, which can form closed rings or "lassos" in the presence of a planar rotating magnetic field...
March 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28314103/computational-study-of-the-forces-driving-aggregation-of-ultrasmall-nanoparticles-in-biological-fluids
#18
Sergio A Hassan
Nanoparticle (NP) aggregation can lead to prolonged retention in tissues or embolism, among other adverse effects. Successful use in biomedicine thus requires the capability to make NPs with limited aggregative potential. Rational design is presently a challenge due to incomplete knowledge of their interactions in biofluids. Recently, ultrasmall gold NPs passivated with endogenous antioxidant glutathione have shown promise for use in vivo. Computer simulations are here conducted to identify the forces underlying aggregation (or lack thereof) of these NPs in a cell culture...
March 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28304180/nanomedicine-for-the-treatment-of-acute-respiratory-distress-syndrome-the-2016-ats-bear-cage-award-winning-proposal
#19
Jacob S Brenner
After dozens of clinical trials, there are still no FDA-approved drugs which improve mortality in acute respiratory distress syndrome (ARDS). These poor results may in part be caused by three unique pharmacological challenges presented by ARDS: 1) ARDS patients are fragile due to concomitant multiple organ dysfunction, so do not tolerate off-target side effects of drugs; 2) inhaled drug delivery is impeded by the column of proteinaceous fluid covering the injured alveoli; 3) ARDS is heterogeneous in its underlying pathophysiology, so targeting one pathway is unlikely to improve most patients...
March 17, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28299191/cytomegalovirus-in-pregnancy-and-the-neonate
#20
REVIEW
Vincent C Emery, Tiziana Lazzarotto
Congenital cytomegalovirus (CMV) remains a leading cause of disability in children. Understanding the pathogenesis of infection from the mother via the placenta to the neonate is crucial if we are to produce new interventions and provide supportive mechanisms to improve the outcome of congenitally infected children. In recent years, some major goals have been achieved, including the diagnosis of primary maternal CMV infection in pregnant women by using the anti-CMV IgG avidity test and the diagnosis and prognosis of foetal CMV infection by using polymerase chain reaction real-time tests to detect and quantify the virus in amniotic fluid...
2017: F1000Research
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