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https://www.readbyqxmd.com/read/28103107/star-masses-and-star-planet-distances-for-earth-like-habitability
#1
David Waltham
This paper presents statistical estimates for the location and duration of habitable zones (HZs) around stars of different mass. The approach is based upon the assumption that Earth's location, and the Sun's mass, should not be highly atypical of inhabited planets. The results support climate-model-based estimates for the location of the Sun's HZ except models giving a present-day outer-edge beyond 1.64 AU. The statistical approach also demonstrates that there is a habitability issue for stars smaller than 0...
January 2017: Astrobiology
https://www.readbyqxmd.com/read/28100177/effect-of-desflurane-remifentanil-vs-propofol-remifentanil-anesthesia-on-arterial-oxygenation-during-one-lung-ventilation-for-thoracoscopic-surgery-a-prospective-randomized-trial
#2
Youn Joung Cho, Tae Kyong Kim, Deok Man Hong, Jeong-Hwa Seo, Jae-Hyon Bahk, Yunseok Jeon
BACKGROUND: One-lung ventilation during thoracic surgery frequently disturbs normal systemic oxygenation. However, the effect of anesthetics on arterial oxygenation during one-lung ventilation has not been well established in human study. In this clinical trial, we investigated whether a difference between desflurane-remifentanil and propofol-remifentanil anesthesia can be observed with regard to oxygenation during one-lung ventilation for thoracoscopic surgery. METHODS: Adult patients with lung cancer, scheduled for video-assisted thoracoscopic lobectomy without preoperative oxygen support, were screened and randomized to receive desflurane or propofol, with remifentanil continuous infusion in both groups...
January 18, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28099641/sepsis-related-acute-respiratory-distress-syndrome-in-children-with-cancer-the-respiratory-dynamics-of-a-devastating-condition
#3
Rodrigo Genaro Arduini, Orlei Ribeiro de Araujo, Dafne Cardoso Bourguignon da Silva, Andreza Almeida Senerchia, Antonio Sergio Petrilli
Objective: To evaluate the clinical course and respiratory parameters of mechanically ventilated children with cancer suffering from sepsis-related acute respiratory distress syndrome. Methods: This 2-year prospective, longitudinal, observational cohort study enrolled 29 children and adolescents. Clinical data, measurements of blood gases and ventilation parameters were collected at four different time points. Fluctuations between measurements as well as differences in estimated means were analyzed by linear mixed models in which death within 28 days from the onset of acute respiratory distress syndrome was the primary endpoint...
October 2016: Revista Brasileira de Terapia Intensiva
https://www.readbyqxmd.com/read/28076685/diffusion-of-evidence-based-intensive-care-unit-organizational-practices-a-state-wide-analysis
#4
Rachel Kohn, Vanessa Madden, Jeremy M Kahn, David A Asch, Amber E Barnato, Scott D Halpern, Meeta Prasad Kerlin
RATIONALE: Several intensive care unit (ICU) organizational practices have been associated with improved patient outcomes. However, the uptake of these evidence-based practices is unknown. OBJECTIVE: To assess diffusion of ICU organizational practices across the state of Pennsylvania. METHODS: We conducted two web-based, cross-sectional surveys of ICU organizational practices in Pennsylvania acute care hospitals, in 2005 (chief nursing officer respondents) and 2014 (ICU nurse manager respondents)...
January 11, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28074492/confirmation-of-resting-state-bold-fluctuations-in-the-human-brainstem-and-spinal-cord-after-identification-and-removal-of-physiological-noise
#5
Shreyas Harita, Patrick W Stroman
PURPOSE: Resting-state functional MRI (rs-fMRI) has been used to investigate networks within the cortex, but its use in the brainstem (BS) and spinal cord (SC) has been limited. This region presents challenges for fMRI, partly because of sources of physiological noise. This study aims to quantify noise contributions to rs-fMRI, and to obtain evidence of resting-state blood oxygenation level-dependent (BOLD) fluctuations. METHODS: Resting-state-fMRI data were obtained from the BS/SC in 16 participants, at 3 Tesla, with T2 -weighted single-shot fast spin-echo imaging...
January 11, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28073440/climate-variability-and-dinophysis-acuta-blooms-in-an-upwelling-system
#6
Patricio A Díaz, Manuel Ruiz-Villarreal, Yolanda Pazos, Teresa Moita, Beatriz Reguera
Dinophysis acuta is a frequent seasonal lipophilic toxin producer in European Atlantic coastal waters associated with thermal stratification. In the Galician Rías, populations of D. acuta with their epicentre located off Aveiro (northern Portugal), typically co-occur with and follow those of Dinophysis acuminata during the upwelling transition (early autumn) as a result of longshore transport. During hotter than average summers, D. acuta blooms also occur in August in the Rías, when they replace D. acuminata...
March 2016: Harmful Algae
https://www.readbyqxmd.com/read/28073437/a-high-resolution-hydrodynamic-model-system-suitable-for-novel-harmful-algal-bloom-modelling-in-areas-of-complex-coastline-and-topography
#7
Dmitry Aleynik, Andrew C Dale, Marie Porter, Keith Davidson
Fjordic coastlines provide sheltered locations for finfish and shellfish aquaculture, and are often subject to harmful algal blooms (HABs) some of which develop offshore and are then advected to impact nearshore aquaculture. Numerical models are a potentially important tool for providing early warning of such HAB events. However, the complex topography of fjordic shelf regions is a significant challenge to modelling. This is frequently compounded by complex bathymetry and local weather patterns. Existing structured grid models do not provide the resolution needed to represent these coastlines in their wider shelf context...
March 2016: Harmful Algae
https://www.readbyqxmd.com/read/28070292/a-fundamental-study-revisited-quantitative-evidence-for-territory-quality-in-oystercatchers-haematopus-ostralegus-using-gps-data-loggers
#8
Philipp Schwemmer, Stefan Weiel, Stefan Garthe
A fundamental study by Ens et al. (1992, Journal of Animal Ecology, 61, 703) developed the concept of two different nest-territory qualities in Eurasian oystercatchers (Haematopus ostralegus, L.), resulting in different reproductive successes. "Resident" oystercatchers use breeding territories close to the high-tide line and occupy adjacent foraging territories on mudflats. "Leapfrog" oystercatchers breed further away from their foraging territories. In accordance with this concept, we hypothesized that both foraging trip duration and trip distance from the high-tide line to the foraging territory would be linearly related to distance between the nest site and the high tide line...
January 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28067630/novel-swine-model-of-ricin-induced-acute-respiratory-distress-syndrome
#9
Shahaf Katalan, Reut Falach, Amir Rosner, Michael Goldvaser, Tal Brosh-Nissimov, Ayana Dvir, Avi Mizrachi, Orr Goren, Barak Cohen, Yoav Gal, Anita Sapoznikov, Sharon Ehrlich, Tamar Sabo, Chanoch Kronman
Pulmonary exposure to the plant toxin ricin, leads to respiratory insufficiency and death. To date, in-depth study of the functional disorders ensuing pulmonary intoxication, a prerequisite for establishing a clinically-relevant therapeutic protocol, is hampered by the lack of an appropriate animal model. To this end, we set up the pig, as a large animal model for the comprehensive study of the multifarious clinical manifestations of pulmonary ricinosis.Here we report for the first time, the monitoring of barometric whole body plethysmography for pulmonary function tests in non-anesthetized ricin-intoxicated pigs...
January 6, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28065378/difference-in-diaphragmatic-motion-during-tidal-breathing-in-a-standing-position-between-copd-patients-and-normal-subjects-time-resolved-quantitative-evaluation-using-dynamic-chest-radiography-with-flat-panel-detector-system-dynamic-x-ray-phrenicography
#10
Yoshitake Yamada, Masako Ueyama, Takehiko Abe, Tetsuro Araki, Takayuki Abe, Mizuki Nishino, Masahiro Jinzaki, Hiroto Hatabu, Shoji Kudoh
OBJECTIVES: To quantitatively compare diaphragmatic motion during tidal breathing in a standing position between chronic obstructive pulmonary disease (COPD) patients and normal subjects using dynamic chest radiography. MATERIALS AND METHODS: Thirty-nine COPD patients (35 males; age, 71.3±8.4years) and 47 normal subjects (non-smoker healthy volunteers) (20 males; age, 54.8±9.8years) underwent sequential chest radiographs during tidal breathing using dynamic chest radiography with a flat panel detector system...
February 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28050773/the-effect-of-chronic-intermittent-hypoxia-on-respiratory-sensitivity-to-morphine-in-rats
#11
Jian Wu, Peng Li, Xiuying Wu
PURPOSE: Chronic intermittent hypoxia (CIH) is a characteristic of obstructive sleep apnea syndromes (OSAs). Recurrent hypoxia during the developmental period increases respiratory sensitivity to subsequent administration of opioids. However, it is unknown whether CIH affects respiratory sensitivity to opioids in adults. Our study aimed to assess the changes in respiratory sensitivity to morphine (MOR) under CIH and to explore the possible mechanisms in an adult rat model. METHODS: We applied CIH in adult Sprague-Dawley rats to simulate the hypoxia condition caused by OSAs...
January 3, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/28048383/th-ef-bra-01-5d-respiratory-motion-model-based-iterative-reconstruction-method-for-4dcbct
#12
J Liu, D Low, H Gao
PURPOSE: The 4DCBCT image reconstruction suffers from the insufficient number of projections and the error from projection binning. We have recently developed a 5D respiratory motion model based iterative reconstruction method (5D method) for 4DCBCT in a proof-of-concept 2D setting. The 5D method reconstructs a reference image and two time-independent vector fields without projection binning, based on which any temporal phase at each projection can be generated. As a result, the 5D method needs fewer number of projections and is free from binning error...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28039643/respiratory-dynamics-and-dead-space-to-tidal-volume-ratio-of-volume-controlled-versus-pressure-controlled-ventilation-during-prolonged-gynecological-laparoscopic-surgery
#13
Ming Lian, Xiao Zhao, Hong Wang, Lianhua Chen, Shitong Li
BACKGROUND: Laparoscopic operations have become longer and more complex and applied to a broader patient population in the last decades. Prolonged gynecological laparoscopic surgeries require prolonged pneumoperitoneum and Trendelenburg position, which can influence respiratory dynamics and other measurements of pulmonary function. We investigated the differences between volume-controlled ventilation (VCV) and pressure-controlled ventilation (PCV) and tried to determine the more efficient ventilation mode during prolonged pneumoperitoneum in gynecological laparoscopy...
December 30, 2016: Surgical Endoscopy
https://www.readbyqxmd.com/read/28038817/low-partial-pressure-of-end-tidal-carbon-dioxide-predicts-left-ventricular-assist-device-implantation-in-patients-with-advanced-chronic-heart-failure
#14
Osamu Seguchi, Eriko Hisamatsu, Atsushi Nakano, Seiko Nakajima, Kensuke Kuroda, Takuya Watanabe, Takuma Sato, Haruki Sunami, Masanobu Yanase, Hiroki Hata, Toshimitsu Hamasaki, Tomoyuki Fujita, Junjiro Kobayashi, Takeshi Nakatani, Masafumi Kitakaze, Norihide Fukushima
BACKGROUND: This study aimed to clarify the prognostic impact of partial pressure of end-tidal carbon dioxide (PETCO2) in patients with advanced chronic heart failure (HF). METHODS: Forty-eight patients (mean age 43.1±11.9years, 32 males) with chronic HF (44 with non-ischemic and 4 with ischemic cardiomyopathy) were prospectively enrolled. Echocardiography, blood tests, pulmonary function testing, and PETCO2 measurements were performed as noninvasive tests, whereas right heart catheterization and arterial blood gas analysis were conducted as invasive tests...
December 21, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/28032265/using-continuous-quantitative-capnography-for-emergency-department-procedural-sedation-a-systematic-review-and-cost-effectiveness-analysis
#15
Nicholas Matthew Mohr, Andrew Stoltze, Azeemuddin Ahmed, Elizabeth Kiscaden, Dan Shane
End-tidal CO2 has been advocated to improve safety of emergency department (ED) procedural sedation by decreasing hypoxia and catastrophic outcomes. This study aimed to estimate the cost-effectiveness of routine use of continuous waveform quantitative end-tidal CO2 monitoring for ED procedural sedation in prevention of catastrophic events. Markov modeling was used to perform cost-effectiveness analysis to estimate societal costs per prevented catastrophic event (death or hypoxic brain injury) during routine ED procedural sedation...
December 28, 2016: Internal and Emergency Medicine
https://www.readbyqxmd.com/read/28006743/an-expert-panel-process-to-evaluate-habitat-restoration-actions-in-the-columbia-river-estuary
#16
Kirk L Krueger, Daniel L Bottom, W Gregory Hood, Gary E Johnson, Kim K Jones, Ronald M Thom
We describe a process for evaluating proposed ecosystem restoration projects intended to improve survival of juvenile salmon in the Columbia River estuary (CRE). Changes in the Columbia River basin (northwestern USA), including hydropower development, have contributed to the listing of 13 salmon stocks as endangered or threatened under the U.S. Endangered Species Act. Habitat restoration in the CRE, from Bonneville Dam to the ocean, is part of a basin-wide, legally mandated effort to mitigate federal hydropower impacts on salmon survival...
March 1, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28005953/pathophysiological-consequences-of-a-break-in-s1p1-dependent-homeostasis-of-vascular-permeability-revealed-by-s1p1-competitive-antagonism
#17
Marc Bigaud, Zuhal Dincer, Birgit Bollbuck, Janet Dawson, Nicolau Beckmann, Christian Beerli, Gina Fishli-Cavelti, Michaela Nahler, Daniela Angst, Philipp Janser, Heike Otto, Elisabeth Rosner, Rene Hersperger, Christian Bruns, Jean Quancard
RATIONAL: Homeostasis of vascular barriers depends upon sphingosine 1-phosphate (S1P) signaling via the S1P1 receptor. Accordingly, S1P1 competitive antagonism is known to reduce vascular barrier integrity with still unclear pathophysiological consequences. This was explored in the present study using NIBR-0213, a potent and selective S1P1 competitive antagonist. RESULTS: NIBR-0213 was tolerated at the efficacious oral dose of 30 mg/kg BID in the rat adjuvant-induced arthritis (AiA) model, with no sign of labored breathing...
2016: PloS One
https://www.readbyqxmd.com/read/28003556/a-comparison-of-different-techniques-for-interfacing-capnography-with-adult-and-pediatric-supplemental-oxygen-masks
#18
Justin S Phillips, Lance P Pangilinan, Earl R E Mangalindan, Joseph L Booze, Richard H Kallet
BACKGROUND: Accurately measuring the partial pressure of end-tidal CO2 (PETCO2 ) in non-intubated patients is problematic due to dilution of expired CO2 at high O2 flows and mask designs that may either cause CO2 rebreathing or inadequately capture expired CO2. We evaluated the performance of 2 capnographic O2 masks (Cap-ONE and OxyMask) against a clinically expedient method using a standard O2 mask with a flow-directed nasal cannula used for capnography (CapnoLine) in a spontaneous breathing model of an adult and child under conditions of normal ventilation, hypoventilation, and hyperventilation...
January 2017: Respiratory Care
https://www.readbyqxmd.com/read/28003555/redesign-of-an-open-system-oxygen-face-mask-with-mainstream-capnometer-for-children
#19
Natalie Napolitano, Akira Nishisaki, Hayley S Buffman, Jessica Leffelman, Matthew R Maltese, Vinay M Nadkarni
BACKGROUND: Partial pressure of end-tidal carbon dioxide (PETCO2 ) monitoring in children is important to detect apnea or hypopnea early to intervene before hypoxemia develops. Monitoring PETCO2 in children without a tracheal tube is challenging. To improve PETCO2 measurement accuracy in a commercially available mask with a mainstream CO2 detector, we implemented design changes with deform-and-hold shaping technology and anterior-posterior adjustment of the expiratory gas flow cup. METHODS: Two sizes of redesigned face masks (small for 7-20 kg, medium for 10-40 kg) were evaluated...
January 2017: Respiratory Care
https://www.readbyqxmd.com/read/27999152/optimizing-peep-by-electrical-impedance-tomography-in-a-porcine-animal-model-of-ards
#20
Nadine Hochhausen, Ingeborg Biener, Rolf Rossaint, Andreas Follmann, Christian Bleilevens, Till Braunschweig, Steffen Leonhardt, Michael Czaplik
BACKGROUND: Mechanical ventilation is necessary in diverse clinical circumstances. Especially in the context of ARDS, so-called protective ventilation strategies must be followed. It is already known that PEEP might enhance oxygenation in ARDS. However, determining the optimal PEEP settings in clinical routines is challenging. Electrical impedance tomography (EIT) is a promising technique with which to adjust ventilator settings. We investigated whether the combination of different EIT parameters, namely the global inhomogeneity and hyperdistension indices, may lead to a feasible and safe PEEP setting...
December 20, 2016: Respiratory Care
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