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https://www.readbyqxmd.com/read/28545266/-analysis-of-misssed-diagnosis-and-misdiagnosis-of-1-212-cases-with-placental-abruption
#1
D Xu, C Liang, J W Xu, J He
Objective: To investigate the risk factors and clinical manifestations of placental abruption, and to analyze the causes of missed diagnosis and misdiagnosis. Methods: A retrospective analysis was conducted in 135 584 women who delivered in Women's Hospital, School of Medicine, Zhejiang University from January 2005 to December 2015. The diagnosis of placental abruption was made in 1 212 cases. According to the consistency of prenatal and postnatal diagnosis, they were divided into 3 groups. (1) The diagnosis was consistent prenatally and postnatally in 715 cases(58...
May 25, 2017: Zhonghua Fu Chan Ke za Zhi
https://www.readbyqxmd.com/read/28544827/procedural-techniques-for-the-management-of-severe-transvalvular-and-paravalvular-aortic-regurgitation-during-tavr
#2
Abdulla A Damluji, Carlos E Alfonso, Mauricio G Cohen
Aortic regurgitation (AR) after transcatheter aortic valve replacement (TAVR) is associated with an increased risk of mortality. In severe cases, abrupt hemodynamic changes may occur with a sudden increase in left ventricular end-diastolic pressure that results in frank pulmonary edema, hypoxia, and cardiogenic shock. Here, the case is reported of a patient who developed severe AR immediately after valve deployment that led to severe hemodynamic compromise. The procedural techniques necessary for the immediate management of severe transvalvular and paravalvular AR are described...
January 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28543334/the-use-of-selective-serotonin-receptor-inhibitors-ssris-is-not-associated-with-increased-risk-of-endoscopy-refractory-bleeding-rebleeding-or-mortality-in-peptic-ulcer-bleeding
#3
S B Laursen, G I Leontiadis, A J Stanley, J Hallas, O B Schaffalitzky de Muckadell
BACKGROUND: Observational studies have consistently shown an increased risk of upper gastrointestinal bleeding in users of selective serotonin receptor inhibitors (SSRIs), probably explained by their inhibition of platelet aggregation. Therefore, treatment with SSRIs is often temporarily withheld in patients with peptic ulcer bleeding. However, abrupt discontinuation of SSRIs is associated with development of withdrawal symptoms in one-third of patients. Further data are needed to clarify whether treatment with SSRIs is associated with poor outcomes, which would support temporary discontinuation of treatment...
May 23, 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28542409/voting-contagion-modeling-and-analysis-of-a-century-of-u-s-presidential-elections
#4
Dan Braha, Marcus A M de Aguiar
Social influence plays an important role in human behavior and decisions. Sources of influence can be divided as external, which are independent of social context, or as originating from peers, such as family and friends. An important question is how to disentangle the social contagion by peers from external influences. While a variety of experimental and observational studies provided insight into this problem, identifying the extent of contagion based on large-scale observational data with an unknown network structure remains largely unexplored...
2017: PloS One
https://www.readbyqxmd.com/read/28542290/new-paradigm-for-auditory-paired-pulse-suppression
#5
Nobuyuki Takeuchi, Shunsuke Sugiyama, Koji Inui, Kousuke Kanemoto, Makoto Nishihara
Sensory gating is a mechanism of sensory processing used to prevent an overflow of irrelevant information, with some indexes, such as prepulse inhibition (PPI) and P50 suppression, often utilized for its evaluation. In addition, those are clinically important for diseases such as schizophrenia. In the present study, we investigated long-latency paired-pulse suppression of change-related cortical responses using magnetoencephalography. The test change-related response was evoked by an abrupt increase in sound pressure by 15 dB in a continuous sound composed of a train of 25-ms pure tones at 65 dB...
2017: PloS One
https://www.readbyqxmd.com/read/28540782/computational-modelling-of-internally-cooled-wet-icw-electrodes-for-radiofrequency-ablation-impact-of-rehydration-thermal-convection-and-electrical-conductivity
#6
Macarena Trujillo, Jose Bon, Enrique Berjano
PURPOSE: (1) To analyse rehydration, thermal convection and increased electrical conductivity as the three phenomena which distinguish the performance of internally cooled electrodes (IC) and internally cooled wet (ICW) electrodes during radiofrequency ablation (RFA), (2) Implement a RFA computer model with an ICW which includes these phenomena and (3) Assess their relative influence on the thermal and electrical tissue response and on the coagulation zone size. METHODS: A 12-min RFA in liver was modelled using an ICW electrode (17 G, 3 cm tip) by an impedance-control pulsing protocol with a constant current of 1...
March 21, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28540029/adaptation-induced-blindness-is-orientation-tuned-and-monocular
#7
Deborah Apthorp, Scott Griffiths, David Alais, John Cass
We examined the recently discovered phenomenon of Adaptation-Induced Blindness (AIB), in which highly visible gratings with gradual onset profiles become invisible after exposure to a rapidly flickering grating, even at very high contrasts. Using very similar stimuli to those in the original AIB experiment, we replicated the original effect across multiple contrast levels, with observers at chance in detecting the gradual onset stimuli at all contrasts. Then, using full-contrast target stimuli with either abrupt or gradual onsets, we tested both the orientation tuning and interocular transfer of AIB...
March 2017: I-Perception
https://www.readbyqxmd.com/read/28539048/thermochromic-ion-exchange-micelles-containing-h-chromoionophores
#8
Xinfeng Du, Changyou Zhu, Xiaojiang Xie
Thermochromic composites constitute a classical subfamily of stimuli responsive materials. We report here the thermochromic effect in Pluronic F-127 (F127) micelles containing hydrophobic ion-exchanger and H(+) chromoionophores. The highly versatile and reversible thermochromism is attributed to the temperature-induced hydration-dehydration of the peripheral layer of the micelles, which in turn controls the ion-exchange process between the core and the periphery of the micelles. The color typically changes abruptly within 3 to 5 degree Celsius and the color transition temperature can be tuned within 5 to 25 degree Celsius upon varying the F127 concentrations...
May 24, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28537735/improved-superresolution-imaging-using-telegraph-noise-in-organic-semiconductor-nanoparticles
#9
Yifei Jiang, Muskendol Novoa, Teeranan Nongnual, Rhonda Powell, Terri F Bruce, Jason D McNeill
Small semiconductor structures often exhibit "telegraph noise". If the number of charge carriers is small, then spontaneous changes in the number of carriers can lead to abrupt switching between two or more discrete levels, leading to burst noise or popcorn noise in transistors. We have observed similar behavior in the fluorescence of organic semiconductor nanoparticles, where typical carrier populations are often less than ~10 carriers per nanoparticle. Spontaneous changes in the number of charges results in abrupt switching between 2 or more fluorescence intensity levels, since the charges act as highly efficient fluorescence quenchers...
May 24, 2017: Nano Letters
https://www.readbyqxmd.com/read/28535861/elo-rating-for-tracking-rank-fluctuations-after-demographic-changes-involving-semi-free-ranging-rhesus-macaques-macaca-mulatta
#10
Lauren J Wooddell, Stefano Sk Kaburu, Stephen J Suomi, Amanda M Dettmer
Rhesus macaques (Macaca mulatta) are gregarious primates that form despotic societies characterized by frequent and intense aggression. Within long-term social groups, demographic changes may influence hierarchical stability, potentially resulting in conflict and violently abrupt hierarchical changes. This conflict can result in serious implications for animal welfare, and thus, predictive tools would be invaluable to captive managers in determining social instabilities. Using the method Elo-rating to track rank changes and dominance stability, we predicted that demographic changes to a population of semi-free ranging rhesus macaques would result in changes in hierarchical stability...
May 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28535173/invited-commentary-self-control-is-a-virtue
#11
C R Weinberg
The case-crossover design, introduced in 1991 by Malcolm Maclure (Am J Epidemiol. 1991;133(2):144-153), provided a precise and powerful tool for studying short-term effects of transient triggering exposures on abrupt outcomes like myocardial infarction. The design is an example of "self-control." One compares case-time intervals that include experiences that came just before the health event with control-time intervals that capture comparable experiences more remote from the event. Methodologists have since tweaked the general approach, recognizing issues that need to be considered to guard against time-driven confounders...
May 23, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28534733/acute-acoustic-trauma-among-soldiers-during-an-intense-combat
#12
Noam Yehudai, Nir Fink, Manor Shpriz, Tal Marom
BACKGROUND: During military actions, soldiers are constantly exposed to various forms of potentially harmful noises. Acute acoustic trauma (AAT) results from an impact, unexpected intense noise ≥140 dB, which generates a high-energy sound wave that can damage the auditory system. PURPOSE: We sought to characterize AAT injuries among military personnel during operation "Protective Edge," to analyze the effectiveness of hearing protection devices (HPDs), and to evaluate the benefit of steroid treatment in early-diagnosed AAT injury...
May 2017: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/28533617/estimated-lower-speed-boundary-at-which-the-walk-ratio-constancy-is-broken-in-healthy-adults
#13
Rumi Murakami, Yohei Otaka
[Purpose] The ratio of step length to cadence (walk ratio) is invariant over a wide range of speeds. However, no studies have investigated details of the change in the walk ratio at slow speeds. It is necessary to explore how walking behavior changes at a low speed to understand the slow walking observed in various conditions such as aging and pathological conditions. In this study, changes in the walk ratio at slow speeds were investigated, and a lower boundary was estimated at which the walk ratio constancy is broken...
April 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28532255/outpatient-vs-inpatient-management-for-superimposed-preeclampsia-without-severe-features-a-retrospective-multicenter-study
#14
Corina N Schoen, Sindy C Moreno, Gabriele Saccone, Nora M Graham, Lauren C Hand, Giuseppe M Maruotti, Pasquale Martinelli, Vincenzo Berghella, Amanda Roman
PURPOSE: To determine if women with preterm superimposed preeclampsia without severe features can be successfully and safely triaged to outpatient management. MATERIALS AND METHODS: This was a multicenter, retrospective, cohort study of singleton pregnancies with superimposed preeclampsia without severe features diagnosed before 37 weeks managed outpatient versus inpatient at Thomas Jefferson University (Philadelphia, USA) and at University of Naples (Naples, Italy) from January 2008 to July 2015...
May 22, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28530402/spin-crossover-in-double-salts-containing-six-and-four-coordinate-cobalt-ii-ions
#15
Joanna Palion-Gazda, Barbara Machura, Rafal Kruszynski, Thais Grancha, Nicolás Moliner, Francesc Lloret, Miguel Julve
The preparation and spectroscopic and structural characterization of three cobalt(II) complexes of formulas [Co(tppz)2](dca)2 (1), [Co(tppz)2][Co(NCS)4]·MeOH (2), and [Co(tppz)2][Co(NCO)4]·2H2O (3) [tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazine and dca = dicyanamide] are reported here. Compounds 1-3 have in common the presence of the cationic [Co(tppz)2](2+) entity where each mer-tridentate tppz ligand coordinates to the cobalt(II) ion equatorially through two pyridyl donors and axially via the pyrazine, completing the six-coordination...
May 22, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28530240/controlling-for-the-species-area-effect-supports-constrained-long-term-mesozoic-terrestrial-vertebrate-diversification
#16
Roger A Close, Roger B J Benson, Paul Upchurch, Richard J Butler
Variation in the geographic spread of fossil localities strongly biases inferences about the evolution of biodiversity, due to the ubiquitous scaling of species richness with area. This obscures answers to key questions, such as how tetrapods attained their tremendous extant diversity. Here, we address this problem by applying sampling standardization methods to spatial regions of equal size, within a global Mesozoic-early Palaeogene data set of non-flying terrestrial tetrapods. We recover no significant increase in species richness between the Late Triassic and the Cretaceous/Palaeogene (K/Pg) boundary, strongly supporting bounded diversification in Mesozoic tetrapods...
May 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28529753/assessment-of-xerostomia-and-its-impact-on-quality-of-life-in-head-and-neck-cancer-patients-undergoing-radiation-therapy
#17
Pinelopi-Theopisti Memtsa, Maria Tolia, Ioannis Tzitzikas, John Bizakis, Kyriaki Pistevou-Gombaki, Martha Charalambidou, Chrysoula Iliopoulou, George Kyrgias
Xerostomia in head and neck (H&N) cancer patients significantly affects their quality of life (QoL). The aim of the present study was to investigate the associations among QoL, xerostomia and quantity of saliva in a sample of H&N cancer patients who had received conventional radiotherapy (RT). A total of 60 H&N adult patients were enrolled in this prospective study. The patients completed the European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire-Core 30 (QLQ-C30), the Quality of Life Questionnaire Head and Neck Module (QLQ-H&N35) and the Greek version of the XQ questionnaire at 4 timepoints: At the beginning of RT, at the end of RT, 6 months after RT completion and 1 year after RT completion...
May 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28528705/complications-of-proton-pump-inhibitor-therapy
#18
REVIEW
Michael F Vaezi, Yu-Xiao Yang, Colin W Howden
Safety issues associated with proton pump inhibitors (PPIs) have recently attracted widespread media and lay attention. Gastroenterologists are frequently asked about the appropriateness of PPI therapy for specific patients. Furthermore, some patients may have had PPI therapy discontinued abruptly or inappropriately due to safety concerns. Faced with such a wide variety of potentially serious adverse consequences, prescribers need to evaluate the evidence objectively to discern the likelihood that any reported association might actually be causal...
May 18, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28527802/abrupt-weaning-reduces-postweaning-growth-and-is-associated-with-alterations-in-gastrointestinal-markers-of-development-in-dairy-calves-fed-an-elevated-plane-of-nutrition-during-the-preweaning-period
#19
M A Steele, J H Doelman, L N Leal, F Soberon, M Carson, J A Metcalf
The benefits of feeding elevated quantities of milk to dairy calves have been well established. However, there is a reluctance to adopt this method of feeding in commercial dairy production because of concerns around growth, health, and ruminal development during weaning. The objective of this study was to characterize the effect of an abrupt (0 d step-down) or gradual (12 d step-down) feeding scheme when calves are fed an elevated plane of nutrition (offered 1.35 kg of milk replacer/d). For this experiment, a total of 54 calves were randomly assigned to an abrupt or a gradual weaning protocol before weaning at 48 d of life...
May 17, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28527439/preferential-binding-effects-on-protein-structure-and-dynamics-revealed-by-coarse-grained-monte-carlo-simulation
#20
R B Pandey, D J Jacobs, B L Farmer
The effect of preferential binding of solute molecules within an aqueous solution on the structure and dynamics of the histone H3.1 protein is examined by a coarse-grained Monte Carlo simulation. The knowledge-based residue-residue and hydropathy-index-based residue-solvent interactions are used as input to analyze a number of local and global physical quantities as a function of the residue-solvent interaction strength (f). Results from simulations that treat the aqueous solution as a homogeneous effective solvent medium are compared to when positional fluctuations of the solute molecules are explicitly considered...
May 21, 2017: Journal of Chemical Physics
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