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https://www.readbyqxmd.com/read/28108768/severe-hypercapnia-and-outcome-of-mechanically-ventilated-patients-with-moderate-or-severe-acute-respiratory-distress-syndrome
#1
Nicolas Nin, Alfonso Muriel, Oscar Peñuelas, Laurent Brochard, José Angel Lorente, Niall D Ferguson, Konstantinos Raymondos, Fernando Ríos, Damian A Violi, Arnaud W Thille, Marco González, Asisclo J Villagomez, Javier Hurtado, Andrew R Davies, Bin Du, Salvatore M Maggiore, Luis Soto, Gabriel D'Empaire, Dimitrios Matamis, Fekri Abroug, Rui P Moreno, Marco Antonio Soares, Yaseen Arabi, Freddy Sandi, Manuel Jibaja, Pravin Amin, Younsuck Koh, Michael A Kuiper, Hans-Henrik Bülow, Amine Ali Zeggwagh, Antonio Anzueto, Jacob I Sznajder, Andres Esteban
PURPOSE: To analyze the relationship between hypercapnia developing within the first 48 h after the start of mechanical ventilation and outcome in patients with acute respiratory distress syndrome (ARDS). PATIENTS AND METHODS: We performed a secondary analysis of three prospective non-interventional cohort studies focusing on ARDS patients from 927 intensive care units (ICUs) in 40 countries. These patients received mechanical ventilation for more than 12 h during 1-month periods in 1998, 2004, and 2010...
January 20, 2017: Intensive Care Medicine
https://www.readbyqxmd.com/read/28108065/assessment-of-central-venous-physiology-of-fontan-circulation-using-peripheral-venous-pressure
#2
Satoshi Masutani, Clara Kurishima, Akiko Yana, Seiko Kuwata, Yoichi Iwamoto, Hirofumi Saiki, Hirotaka Ishido, Hideaki Senzaki
OBJECTIVE: Elevated central venous pressure is a major cause of morbidity and mortality after the Fontan operation. The difference between mean circulatory filling pressure and central venous pressure, a driving force of venous return, is important in determining dynamic changes in central venous pressure in response to changes in ventricular properties or loading conditions. Thus, noninvasive central venous pressure and mean circulatory filling pressure estimation may contribute to optimal management in patients undergoing the Fontan operation...
December 19, 2016: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28107890/affective-impairment-in-chronic-low-blood-pressure
#3
Stefan Duschek, Alexandra Hoffmann, Gustavo A Reyes Del Paso
OBJECTIVE: Physical complaints such as faintness, dizziness, cold limbs and headaches have been well-established in chronic low blood pressure (hypotension). This study investigated the occurrence of adverse emotional states and the symptoms of depression in this condition. As autonomic dysregulation, particularly diminished sympathetic tone, is believed to be involved in the etiology of hypotension, the impact of different facets of autonomic cardiovascular control on mood and depressive symptoms was also explored...
February 2017: Journal of Psychosomatic Research
https://www.readbyqxmd.com/read/28106887/report-of-12-months-efficacy-and-safety-of-intravitreal-fluocinalone-acetonide-implant-for-the-treatment-of-chronic-diabetic-macular-oedema-a-real-world-result-in-the-united-kingdom
#4
F Alfaqawi, P L Lip, S Elsherbiny, R Chavan, A Mitra, B Mushtaq
: PurposeTo report the 12-months visual and anatomical outcomes of chronic diabetic macular oedema (DMO) treated with ILUVIEN in a real-world clinical practice in a single tertiary referral centre.MethodRetrospective data collection and analysis of consecutive 28 eyes of 23 diabetic patients received ILUVIEN implant for refractory DMO. Standard assessment included visual acuity (VA), central retinal thickness (CRT), slit-lamp biomicroscopy, and Goldmann tonometry for intraocular pressure (IOP) at 1, 6, and 12 months...
January 20, 2017: Eye
https://www.readbyqxmd.com/read/28105745/thin-soft-skin-mounted-microfluidic-networks-with-capillary-bursting-valves-for-chrono-sampling-of-sweat
#5
Jungil Choi, Daeshik Kang, Seungyong Han, Sung Bong Kim, John A Rogers
Systems for time sequential capture of microliter volumes of sweat released from targeted regions of the skin offer the potential to enable analysis of temporal variations in electrolyte balance and biomarker concentration throughout a period of interest. Current methods that rely on absorbent pads taped to the skin do not offer the ease of use in sweat capture needed for quantitative tracking; emerging classes of electronic wearable sweat analysis systems do not directly manage sweat-induced fluid flows for sample isolation...
January 20, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28103448/bedside-contribution-of-electrical-impedance-tomography-to-set-positive-end-expiratory-pressure-for-ecmo-treated-severe-ards-patients
#6
Guillaume Franchineau, Nicolas Bréchot, Guillaume Lebreton, Guillaume Hekimian, Ania Nieszkowska, Jean-Louis Trouillet, Pascal Leprince, Jean Chastre, Charles-Edouard Luyt, Alain Combes, Matthieu Schmidt
RATIONALE: Optimal positive end-expiratory pressure (PEEP) is unknown in severe acute respiratory distress syndrome (ARDS) patients on extracorporeal membrane oxygenation (ECMO) receiving mechanical ventilation with very low tidal volume. OBJECTIVES: To evaluate electrical impedance tomography's (EIT) ability to monitor a PEEP trial and to derive from EIT the best compromise PEEP in this setting. METHODS: A decremental PEEP trial (20-0 cmH2O) in 5 cmH2O steps was monitored by EIT, with lung images divided into four ventral-to-dorsal horizontal regions of interest...
January 19, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28102930/modulation-of-the-thermodynamic-signatures-of-an-rna-thermometer-by-osmolytes-and-salts
#7
Mimi Gao, Loana Arns, Roland Winter
Folding of ribonucleic acids (RNAs) is driven by several factors, such as base pairing and stacking, chain entropy, and ion-mediated electrostatics, which have been studied in great detail. However, the power of background molecules in the cellular milieu is often neglected. Herein, we study the effect of common osmolytes on the folding equilibrium of a hairpin-structured RNA and, using pressure perturbation, provide novel thermodynamic and volumetric insights into the modulation mechanism. The presence of TMAO causes an increased thermal stability and a more positive volume change for the helix-to-coil transition, whereas urea destabilizes the hairpin and leads to an increased expansibility of the unfolded state...
January 19, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28100017/subspecies-delineation-amid-phenotypic-geographic-and-genetic-discordance-in-a-songbird
#8
Jennifer Walsh, Irby J Lovette, Virginia Winder, Chris S Elphick, Brian J Olsen, W Gregory Shriver, Adrienne I Kovach
Understanding the processes that drive divergence within and among species is a long-standing goal in evolutionary biology. Traditional approaches to assessing differentiation rely on phenotypes to identify intra- and interspecific variation, but many species express subtle morphological gradients in which boundaries among forms are unclear. This intraspecific variation may be driven by differential adaptation to local conditions and may thereby reflect the evolutionary potential within a species. Here, we combine genetic and morphological data to evaluate intraspecific variation within the Nelson's (Ammodramus nelsoni) and saltmarsh (A...
January 18, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28097504/estimating-the-relative-weights-of-visual-and-auditory-tau-versus-heuristic-based-cues-for-time-to-contact-judgments-in-realistic-familiar-scenes-by-older-and-younger-adults
#9
Behrang Keshavarz, Jennifer L Campos, Patricia R DeLucia, Daniel Oberfeld
Estimating time to contact (TTC) involves multiple sensory systems, including vision and audition. Previous findings suggested that the ratio of an object's instantaneous optical size/sound intensity to its instantaneous rate of change in optical size/sound intensity (τ) drives TTC judgments. Other evidence has shown that heuristic-based cues are used, including final optical size or final sound pressure level. Most previous studies have used decontextualized and unfamiliar stimuli (e.g., geometric shapes on a blank background)...
January 17, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/28095617/probing-forebrain-to-hindbrain-circuit-functions-in-xenopus
#10
REVIEW
Darcy B Kelley, Taffeta M Elliott, Ben J Evans, Ian C Hall, Elizabeth C Leininger, Heather J Rhodes, Ayako Yamaguchi, Erik Zornik
The vertebrate hindbrain includes neural circuits that govern essential functions including breathing, blood pressure and heart rate. Hindbrain circuits also participate in generating rhythmic motor patterns for vocalization. In most tetrapods, sound production is powered by expiration and the circuitry underlying vocalization and respiration must be linked. Perception and arousal are also linked; acoustic features of social communication sounds - e.g. a baby's cry - can drive autonomic responses. The close links between autonomic functions that are essential for life and vocal expression have been a major in vivo experimental challenge...
January 17, 2017: Genesis: the Journal of Genetics and Development
https://www.readbyqxmd.com/read/28095040/consensus-statement-by-the-american-association-of-clinical-endocrinologists-and-american-college-of-endocrinology-on-the-comprehensive-type-2-diabetes-management-algorithm-2017-executive-summary
#11
Alan J Garber, Martin J Abrahamson, Joshua I Barzilay, Lawrence Blonde, Zachary T Bloomgarden, Michael A Bush, Samuel Dagogo-Jack, Ralph A DeFronzo, Daniel Einhorn, Vivian A Fonseca, Jeffrey R Garber, W Timothy Garvey, George Grunberger, Yehuda Handelsman, Irl B Hirsch, Paul S Jellinger, Janet B McGill, Jeffrey I Mechanick, Paul D Rosenblit, Guillermo E Umpierrez
EXECUTIVE SUMMARY This algorithm for the comprehensive management of persons with type 2 diabetes (T2D) was developed to provide clinicians with a practical guide that considers the whole patient, their spectrum of risks and complications, and evidence-based approaches to treatment. It is now clear that the progressive pancreatic beta-cell defect that drives the deterioration of metabolic control over time begins early and may be present before the diagnosis of diabetes (1). In addition to advocating glycemic control to reduce microvascular complications, this document highlights obesity and prediabetes as underlying risk factors for the development of T2D and associated macrovascular complications...
January 17, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28094515/nanoporous-materials-for-the-onboard-storage-of-natural-gas
#12
K Vasanth Kumar, Kathrin Preuss, Maria-Magdalena Titirici, Francisco Rodríguez-Reinoso
Climate change, global warming, urban air pollution, energy supply uncertainty and depletion, and rising costs of conventional energy sources are, among others, potential socioeconomic threats that our community faces today. Transportation is one of the primary sectors contributing to oil consumption and global warming, and natural gas (NG) is considered to be a relatively clean transportation fuel that can significantly improve local air quality, reduce greenhouse-gas emissions, and decrease the energy dependency on oil sources...
January 17, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28093258/stooping-crouching-and-standing-characterizing-balance-control-strategies-across-postures
#13
Tyler B Weaver, Michal N Glinka, Andrew C Laing
BACKGROUND: While stooping and crouching postures are critical for many activities of daily living, little is known about the balance control mechanisms employed during these postures. Accordingly, the purpose of this study was to characterize the mechanisms driving net center of pressure (COPNet) movement across three postures (standing, stooping, and crouching) and to investigate if control in each posture was influenced by time. METHODS: Ten young adults performed the three postures for 60s each...
January 6, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28092664/expression-of-specific-inflammasome-gene-modules-stratifies-older-individuals-into-two-extreme-clinical-and-immunological-states
#14
David Furman, Junlei Chang, Lydia Lartigue, Christopher R Bolen, François Haddad, Brice Gaudilliere, Edward A Ganio, Gabriela K Fragiadakis, Matthew H Spitzer, Isabelle Douchet, Sophie Daburon, Jean-François Moreau, Garry P Nolan, Patrick Blanco, Julie Déchanet-Merville, Cornelia L Dekker, Vladimir Jojic, Calvin J Kuo, Mark M Davis, Benjamin Faustin
Low-grade, chronic inflammation has been associated with many diseases of aging, but the mechanisms responsible for producing this inflammation remain unclear. Inflammasomes can drive chronic inflammation in the context of an infectious disease or cellular stress, and they trigger the maturation of interleukin-1β (IL-1β). Here we find that the expression of specific inflammasome gene modules stratifies older individuals into two extremes: those with constitutive expression of IL-1β, nucleotide metabolism dysfunction, elevated oxidative stress, high rates of hypertension and arterial stiffness; and those without constitutive expression of IL-1β, who lack these characteristics...
January 16, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28088660/processes-of-anticipatory-postural-adjustment-and-step-movement-of-gait-initiation
#15
Hiroki Mizusawa, Yasutomo Jono, Yasuyuki Iwata, Atsushi Kinoshita, Koichi Hiraoka
The purpose of this study was to elucidate whether the anticipatory postural adjustment (APA) and focal step movement of gait initiation are produced as a single process or different processes and whether the APA receives an inhibitory drive from the ongoing stop process of gait initiation. Healthy humans initiated gait in response to a first visual cue that instructed the initial swing leg. In some trials, a switch or stop cue was also provided after the first cue. When the stop cue was provided, participants withheld gait initiation...
January 13, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28079629/duration-of-pneumonia-therapy-and-the-role-of-biomarkers
#16
Katerina Kaziani, Adamantia Sotiriou, George Dimopoulos
PURPOSE OF REVIEW: Increasing antimicrobial resistance is a worldwide phenomenon that is threatening public health. Lower respiratory infections are one of the leading causes of morbidity that contribute to antibiotic consumption and thus the emergence of multidrug-resistant microbial strains. The goal of shortening antibiotic regimens' duration in common bacterial infections has been prioritized by antimicrobial stewardship programs as an action against this problem. RECENT FINDINGS: Data coming from randomized controlled trials, meta-analyses, and systematic reviews support the shortening of antimicrobial regimens in community-acquired, hospital-acquired, and ventilator-associated pneumonia...
January 12, 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/28079607/mapping-regional-differences-of-local-pressure-volume-curves-with-electrical-impedance-tomography
#17
Alessandro Beda, Alysson R Carvalho, Nadja C Carvalho, Sören Hammermüller, Marcelo B P Amato, Thomas Muders, Claudia Gittel, Katharina Noreikat, Hermann Wrigge, Andreas W Reske
OBJECTIVES: Lung-protective mechanical ventilation aims to prevent alveolar collapse and overdistension, but reliable bedside methods to quantify them are lacking. We propose a quantitative descriptor of the shape of local pressure-volume curves derived from electrical impedance tomography, for computing maps that highlight the presence and location of regions of presumed tidal recruitment (i.e., elastance decrease during inflation, pressure-volume curve with upward curvature) or overdistension (i...
January 10, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28076803/drunken-membranes-short-chain-alcohols-alter-fusion-of-liposomes-to-planar-lipid-bilayers
#18
Jason Paxman, Brady Hunt, David Hallan, Samuel R Zarbock, Dixon J Woodbury
Although the effects of ethanol on protein receptors and lipid membranes have been studied extensively, ethanol's effect on vesicles fusing to lipid bilayers is not known. To determine the effect of alcohols on fusion rates, we utilized the nystatin/ergosterol fusion assay to measure fusion of liposomes to a planar lipid bilayer (BLM). The addition of ethanol excited fusion when applied on the cis (vesicle) side, and inhibited fusion on the trans side. Other short-chain alcohols followed a similar pattern. In general, the inhibitory effect of alcohols (trans) occurs at lower doses than the excitatory (cis) effect, with a decrease of 29% in fusion rates at the legal driving limit of 0...
January 10, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28074474/optimal-defense-theory-explains-deviations-from-latitudinal-herbivory-defense-hypothesis
#19
Nicholas J Kooyers, Benjamin K Blackman, Liza M Holeski
The latitudinal herbivory defense hypothesis (LHDH) postulates that the prevalence of species interactions, including herbivory, is greater at lower latitudes, leading to selection for increased levels of plant defense. While latitudinal defense clines may be caused by spatial variation in herbivore pressure, optimal defense theory predicts that clines could also be caused by ecogeographic variation in the cost of defense. For instance, allocation of resources to defense may not increase plant fitness when growing seasons are short and plants must reproduce quickly...
January 10, 2017: Ecology
https://www.readbyqxmd.com/read/28070896/tiny-protein-detection-using-pressure-through-solid-state-nanopores
#20
Ji Li, Rui Hu, Xiaoqing Li, Xin Tong, Dapeng Yu, Qing Zhao
Solid-state nanopore is a promising tool to detect proteins and its complexes. Small proteins (sub-35 kDa) translocate very fast which could not be detected by normal patch-clamp recording instrument due to low temporal resolution. We firstly introduce pressure into protein study and detection. The pressure-derived force, combined with the voltage bias, makes very tiny protein (MW<6.5 kDa) detection possible. Capture rate for Aprotinin is enhanced five times more than that in traditional voltage-driven method by fine tuning of pressure and voltage...
January 9, 2017: Electrophoresis
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