keyword
MENU ▼
Read by QxMD icon Read
search

Work of breathing

keyword
https://www.readbyqxmd.com/read/28644243/role-of-breathing-conditions-during-exercise-testing-on-training-prescription-in-chronic-obstructive-pulmonary-disease
#1
Daniel Neunhäuserer, Eva Steidle-Kloc, Marco Bergamin, Gertraud Weiss, Andrea Ermolao, Bernd Lamprecht, Michael Studnicka, Josef Niebauer
This study investigated whether different breathing conditions during exercise testing will influence measures of exercise capacity commonly used for training prescription in chronic obstructive pulmonary disease. Twenty-seven patients with chronic obstructive pulmonary disease (forced expiratory volume in 1 sec = 45.6 [9.4]%) performed three maximal exercise tests within 8 days, but at least 48 hrs apart. Subjects were thereby breathing either room air through a tightly fitting face mask like during any cardiopulmonary exercise test (MASK), room air without mask (No-MASK), or 10 l/min of oxygen via nasal cannula (No-MASK + O2)...
June 21, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28642013/identifying-mechanisms-driving-formation-of-granuloma-associated-fibrosis-during-mycobacterium-tuberculosis-infection
#2
Hayley C Warsinske, Robert M DiFazio, Jennifer J Linderman, JoAnne L Flynn, Denise E Kirschner
Mycobacterium tuberculosis (Mtb), the causative agent of tuberculosis (TB), is a pulmonary pathogen of major global concern. A key feature of Mtb infection in primates is the formation of granulomas, dense cellular structures surrounding infected lung tissue. These structures serve as the main site of host-pathogen interaction in TB, and thus to effectively treat TB we must clarify mechanisms of granuloma formation and their function in disease. Fibrotic granulomas are associated with both good and bad disease outcomes...
June 19, 2017: Journal of Theoretical Biology
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
#3
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/28635619/on-the-importance-of-accurate-quantification-of-individual-volatile-metabolites-in-exhaled-breath
#4
David Smith, Patrik Spanel
It is argued that shortcomings of certain approaches to breath analysis research based on superficial interpretation of non-quantitative data are inadvertently inhibiting the progression of non-invasive breath analysis into clinical practice. The objective of this perspective is to suggest more clinically profitable approaches to breath research. Thus, following a discourse on the challenges and expectations in breath research, a brief indication is given of the analytical techniques currently used for the analysis of very humid exhaled breath...
June 21, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28624698/brief-mindfulness-training-de-couples-the-anxiogenic-effects-of-distress-intolerance-on-reactivity-to-and-recovery-from-stress-among-deprived-smokers
#5
Rotem Paz, Ariel Zvielli, Pavel Goldstein, Amit Bernstein
OBJECTIVE: We tested whether mindfulness de-couples the expected anxiogenic effects of distress intolerance on psychological and physiological reactivity to and recovery from an anxiogenic stressor among participants experimentally sensitized to experience distress. METHOD: N = 104 daily smokers underwent 18-hours of biochemically-verified smoking deprivation. Participants were then randomized to a 7-min analogue mindfulness intervention (present moment attention and awareness training; PMAA) or a cope-as-usual control condition; and subsequently exposed to a 2...
June 2, 2017: Behaviour Research and Therapy
https://www.readbyqxmd.com/read/28623791/exposure-profile-of-volatile-organic-compounds-receptor-associated-with-paints-consumption
#6
Di Wang, Lei Nie, Xia Shao, Hongbing Yu
Epidemiologic studies regarding solvent-based paints (SBPs) containing VOCs have demonstrated a strong correlation between chronic and acute adverse health effects and the SBPs. Therefore, new environmentally friendly paints as substitutes containing less or none VOCs have been rapidly developed in research for future sustainable use. However, a few studies focusing on penetration and exposure condition of the substitute have been reported duo to the complexity and inaccessibility of painting industry. Surveys specifically looking at the present status of exposure condition were conducted to ascertain the popularization of water-based paints (WBPs) which concluded that markers of SBPs were detected in all 134 samples indicating bad industrial penetration...
June 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28617491/deciphering-the-dynamics-of-star-molecules-in-shear-flow
#7
Jurij Sablić, Matej Praprotnik, Rafael Delgado-Buscalioni
This work analyses the rotation of star polymers under shear flow, in melts, and in good solvent dilute solution. The latter is modeled by single molecule Brownian hydrodynamics, while melts are modeled using non-equilibrium molecular dynamics in closed (periodic) boxes and in open boundaries. A Dissipative Particle Dynamics (DPD) thermostat introduces pairwise monomer friction in melts at will, in directions normal and tangent to the monomer-monomer vectors. Although tangential friction is seldom modeled, we show that it is essential to control hydrodynamic effects in melts...
June 15, 2017: Soft Matter
https://www.readbyqxmd.com/read/28615157/designing-prototyping-and-evaluating-digital-mindfulness-applications-a-case-study-of-mindful-breathing-for-stress-reduction
#8
Bin Zhu, Anders Hedman, Shuo Feng, Haibo Li, Walter Osika
BACKGROUND: During the past decade, there has been a rapid increase of interactive apps designed for health and well-being. Yet, little research has been published on developing frameworks for design and evaluation of digital mindfulness facilitating technologies. Moreover, many existing digital mindfulness applications are purely software based. There is room for further exploration and assessment of designs that make more use of physical qualities of artifacts. OBJECTIVE: The study aimed to develop and test a new physical digital mindfulness prototype designed for stress reduction...
June 14, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28612121/estimation-of-respiratory-volume-from-thoracoabdominal-breathing-distances-comparison-of-two-models-of-machine-learning
#9
Rémy Dumond, Steven Gastinger, Hala Abdul Rahman, Alexis Le Faucheur, Patrice Quinton, Haitao Kang, Jacques Prioux
PURPOSE: The purposes of this study were to both improve the accuracy of respiratory volume (V) estimates using the respiratory magnetometer plethysmography (RMP) technique and facilitate the use of this technique. METHOD: We compared two models of machine learning (ML) for estimating [Formula: see text]: a linear model (multiple linear regression-MLR) and a nonlinear model (artificial neural network-ANN), and we used cross-validation to validate these models. Fourteen healthy adults, aged [Formula: see text] years participated in the present study...
June 13, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28608135/can-proportional-ventilation-modes-facilitate-exercise-in-critically-ill-patients-a-physiological-cross-over-study-pressure-support-versus-proportional-ventilation-during-lower-limb-exercise-in-ventilated-critically-ill-patients
#10
Evangelia Akoumianaki, Nicolas Dousse, Aissam Lyazidi, Jean-Claude Lefebvre, Severine Graf, Ricardo Luiz Cordioli, Nathalie Rey, Jean-Christophe Marie Richard, Laurent Brochard
BACKGROUND: Early exercise of critically ill patients may have beneficial effects on muscle strength, mass and systemic inflammation. During pressure support ventilation (PSV), a mismatch between demand and assist could increase work of breathing and limit exercise. A better exercise tolerance is possible with a proportional mode of ventilation (Proportional Assist Ventilation, PAV+ and Neurally Adjusted Ventilatory Assist, NAVA). We examined whether, in critically ill patients, PSV and proportional ventilation have different effects on respiratory muscles unloading and work efficiency during exercise...
December 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28606767/model-identifies-causes-of-nasal-drying-during-pressurised-breathing
#11
David E White, Roy J Nates, Jim Bartley
Patients nasally breathing pressurised air frequently experience symptoms suggestive of upper airway drying. While supplementary humidification is often used for symptom relief, the cause(s) of nasal drying symptoms remains speculative. Recent investigations have found augmented air pressure affects airway surface liquid (ASL) supply and inter-nasal airflow apportionment. However the influence these two factors have on ASL hydration is unknown. The purpose of this study is to determine how ASL supply and airflow apportionment affect ASL hydration status for both ambient and pressurised air breathing conditions...
June 9, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28605195/flexible-and-lightweight-fuel-cell-with-high-specific-power-density
#12
Fandi Ning, Xudong He, Yangbin Shen, Hehua Jin, Qingwen Li, Da Li, Shuping Li, Yulu Zhan, Ying Du, Jingjing Jiang, Hui Yang, Xiaochun Zhou
Flexible devices have been attracting great attention recently due to their numerous advantages. But the energy densities of current energy sources are still not high enough to support flexible devices for a satisfactory length of time. Although proton exchange membrane fuel cells (PEMFCs) do have a high-energy density, traditional PEMFCs are usually too heavy, rigid, and bulky to be used in flexible devices. In this research, we successfully invented a light and flexible air-breathing PEMFC by using a new design of PEMFC and a flexible composite electrode...
June 12, 2017: ACS Nano
https://www.readbyqxmd.com/read/28603625/physiological-impact-of-high-flow-nasal-cannula-therapy-on-postextubation-acute-respiratory-failure-after-pediatric-cardiac-surgery-a-prospective-observational-study
#13
Naohiro Shioji, Tatsuo Iwasaki, Tomoyuki Kanazawa, Kazuyoshi Shimizu, Tomohiko Suemori, Kentaro Sugimoto, Yasutoshi Kuroe, Hiroshi Morimatsu
BACKGROUND: Reintubation after pediatric cardiac surgery is associated with a high rate of mortality. Therefore, adequate respiratory support for postextubation acute respiratory failure (ARF) is important. However, little is known about the physiological impact of high-flow nasal cannula (HFNC) therapy on ARF after pediatric cardiac surgery. Our working hypothesis was that HFNC therapy for postextubation ARF after pediatric cardiac surgery improves hemodynamic and respiratory parameters...
2017: Journal of Intensive Care
https://www.readbyqxmd.com/read/28599996/a-training-model-for-improving-journalists-voice
#14
Emma Rodero, Celia Diaz-Rodriguez, Olatz Larrea
Voice education is a crucial aspect for professionals (journalists, teachers, politicians, actors, etc.) who use their voices as a working tool. The main concerns about such education are that, first, there is little awareness of the importance of voice education, and second there is little research devoted to it. The consequences of this lack of training are indeed visible in professionals who suffer voice pathologies or work with little effectiveness. This study seeks to overcome this deficiency by proposing a training model tested with a control group and a pilot study...
June 6, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28593011/pesticide-exposure-and-subjective-symptoms-of-cut-flower-farmers
#15
REVIEW
Hiroshi Nagami, Takajiro Suenaga, Mineko Nakazaki
Sales of cut-flowers depend much on the outer appearance of the flowers. They are not intended to be used as foodstuffs; thus, pesticides are used more liberally for cut flower growing than for other agricultural products. Flower production is often carried out in greenhouses; therefore, pesticide exposure seems to reach not only the person spraying the pesticides, but also the non-spraying workers as well. In 2009, a special research project on pesticide poisoning, affiliated with the Japanese Association of Rural Medicine, developed a study that focused on cut-flower farmers' exposure to pesticide, subsequent adverse symptoms experienced, and treatment modalities to relieve pesticide-related symptoms...
May 2017: Journal of Rural Medicine: JRM
https://www.readbyqxmd.com/read/28592858/inefficient-skeletal-muscle-oxidative-function-flanks-impaired-motor-neuron-recruitment-in-amyotrophic-lateral-sclerosis-during-exercise
#16
F Lanfranconi, A Ferri, G Corna, R Bonazzi, C Lunetta, V Silani, N Riva, A Rigamonti, A Maggiani, C Ferrarese, L Tremolizzo
This study aimed to evaluate muscle oxidative function during exercise in amyotrophic lateral sclerosis patients (pALS) with non-invasive methods in order to assess if determinants of reduced exercise tolerance might match ALS clinical heterogeneity. 17 pALS, who were followed for 4 months, were compared with 13 healthy controls (CTRL). Exercise tolerance was assessed by an incremental exercise test on cycle ergometer measuring peak O2 uptake ([Formula: see text]O2peak), vastus lateralis oxidative function by near infrared spectroscopy (NIRS) and breathing pattern ([Formula: see text]E peak)...
June 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28592029/-effects-of-noninvasive-proportional-assist-vs-pressure-support-ventilation-on-respiratory-work-in-chronic-obstructive-pulmonary-disease-patients-with-hypercapnia
#17
J H Zhang, Q Luo, H J Zhang, R C Chen
Objective: To investigate the effect of noninvasive proportional assist ventilation (PAV) on respiratory work in chronic obstructive pulmonary disease(COPD) patients, in comparison to noninvasive pressure support ventilation(PSV). Methods: Ten severe COPD patients with hypercapnia during acute exacerbation were examined. The baseline inspiratory pressure of PSV (PS) and the assistance level of PAV(PA) were titrated by patients' tolerance. In addition to the baseline PS and PA, an additional decrease by 25% (PS-=75% PS, PA-=75% PA) or increase by 25% (PS+ =125% PS, PA+ =125% PA) of the assist level were applied to the patients...
June 12, 2017: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/28589786/-mine-rescuers-heat-load-during-the-expenditure-of-physical-effort-in-a-hot-environment-using-ventilated-underwear-and-selected-breathing-apparatus
#18
Marszałek Anna, Joanna Bugajska, Bartkowiak Grażyna, Dąbrowska Anna, Sylwia Krzemińska, Krzysztof Łężak, Krzysztof Makowski
Mine rescuers' heat load under the same physical effort load (25% of the maximal oxygen uptake), with the use of three types of breathing apparatuses, in newly-developed heat-removing underwear and outerwear, was assessed under typical work conditions of mine rescuers, under milder and harsher ambient conditions of 32°C and 38°C, respectively, both at relative humidity of 85% and air velocity of 1.0 m/s. It was demonstrated that expending physical effort at the same load while using different kinds of breathing apparatus had resulted in a similar heat load...
June 7, 2017: International Journal of Occupational Safety and Ergonomics: JOSE
https://www.readbyqxmd.com/read/28589534/noninvasive-ventilation-with-helium-oxygen-mixture-in-hypercapnic-copd-exacerbation-aggregate-meta-analysis-of-randomized-controlled-trials
#19
REVIEW
Fekri Abroug, Lamia Ouanes-Besbes, Zeineb Hammouda, Saoussen Benabidallah, Fahmi Dachraoui, Islem Ouanes, Philippe Jolliet
When used as a driving gas during NIV in hypercapnic COPD exacerbation, a helium-oxygen (He/O2) mixture reduces the work of breathing and gas trapping. The potential for He/O2 to reduce the rate of NIV failure leading to intubation and invasive mechanical ventilation has been evaluated in several RCTs. The goal of this meta-analysis is to assess the effect of NIV driven by He/O2 compared to air/O2 on patient-centered outcomes in hypercapnic COPD exacerbation. Relevant RCTs were searched using standard procedures...
December 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28585977/dynamic-effects-and-adhesion-of-water-droplet-impact-on-hydrophobic-surfaces-bouncing-or-sticking
#20
Zhiguang Li, Que Kong, Xiaoyan Ma, Duyang Zang, Xinghua Guan, Xuehong Ren
This work reported the dynamic effects of water droplet impact on flat, porous and pincushion structure films of star shaped polyhedral oligomeric silsesquioxane (POSS) fluorinated acrylates, POSS-poly(trifluoroethyl methacrylate)8 (POSS-(PTFEMA)8) and POSS-(poly(trifluoroethyl methacrylate)-b-poly(methyl methacrylate))8 (POSS-(PTFEMA-b-PMMA)8), using the breath figure method. The porous and pincushion structure films with different surface chemical compositions were obtained by controlling the copolymer structure and temperature and by stripping of the surface...
June 6, 2017: Nanoscale
keyword
keyword
30245
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"