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https://www.readbyqxmd.com/read/29348203/infectious-virus-in-exhaled-breath-of-symptomatic-seasonal-influenza-cases-from-a-college-community
#1
Jing Yan, Michael Grantham, Jovan Pantelic, P Jacob Bueno de Mesquita, Barbara Albert, Fengjie Liu, Sheryl Ehrman, Donald K Milton
Little is known about the amount and infectiousness of influenza virus shed into exhaled breath. This contributes to uncertainty about the importance of airborne influenza transmission. We screened 355 symptomatic volunteers with acute respiratory illness and report 142 cases with confirmed influenza infection who provided 218 paired nasopharyngeal (NP) and 30-minute breath samples (coarse >5-µm and fine ≤5-µm fractions) on days 1-3 after symptom onset. We assessed viral RNA copy number for all samples and cultured NP swabs and fine aerosols...
January 18, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29331743/preliminary-investigation-of-human-exhaled-breath-for-tuberculosis-diagnosis-by-multidimensional-gas-chromatography-time-of-flight-mass-spectrometry-and-machine-learning
#2
Marco Beccaria, Theodore R Mellors, Jacky S Petion, Christiaan A Rees, Mavra Nasir, Hannah K Systrom, Jean W Sairistil, Marc-Antoine Jean-Juste, Vanessa Rivera, Kerline Lavoile, Patrice Severe, Jean W Pape, Peter F Wright, Jane E Hill
Tuberculosis (TB) remains a global public health malady that claims almost 1.8 million lives annually. Diagnosis of TB represents perhaps one of the most challenging aspects of tuberculosis control. Gold standards for diagnosis of active TB (culture and nucleic acid amplification) are sputum-dependent, however, in up to a third of TB cases, an adequate biological sputum sample is not readily available. The analysis of exhaled breath, as an alternative to sputum-dependent tests, has the potential to provide a simple, fast, and non-invasive, and ready-available diagnostic service that could positively change TB detection...
January 4, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29326334/clinical-and-inflammatory-phenotyping-by-breathomics-in-chronic-airway-diseases-irrespective-of-the-diagnostic-label
#3
Rianne de Vries, Yennece W F Dagelet, Pien Spoor, Erik Snoey, Patrick M C Jak, Paul Brinkman, Erica Dijkers, Simon K Bootsma, Fred Elskamp, Frans H C de Jongh, Eric G Haarman, Johannes C C M In 't Veen, Anke-Hilse Maitland-van der Zee, Peter J Sterk
Asthma and chronic obstructive pulmonary disease (COPD) are complex and overlapping diseases that include inflammatory phenotypes. Novel anti-eosinophilic/anti-neutrophilic strategies demand rapid inflammatory phenotyping, which might be accessible from exhaled breath.Our objective was to capture clinical/inflammatory phenotypes in patients with chronic airway disease using an electronic nose (eNose) in a training and validation set.This was a multicentre cross-sectional study in which exhaled breath from asthma and COPD patients (n=435; training n=321 and validation n=114) was analysed using eNose technology...
January 2018: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29319364/comparative-study-of-il-33-and-il-6-levels-in-different-respiratory-samples-in-mild-to-moderate-asthma-and-copd
#4
Katarzyna Gorska, Patrycja Nejman-Gryz, Magdalena Paplinska-Goryca, Piotr Korczynski, Monika Prochorec-Sobieszek, Rafal Krenke
IL-6 and IL-33 are involved in the inflammatory process in obstructive lung diseases. In contrast to IL-6, few data on the expression of IL-33 in different biological samples from asthma and COPD patients are available. The aim was to evaluate the expressions of IL-33 and IL-6 in bronchial mucosa and to compare these expressions with the concentrations of both cytokines in various respiratory samples from patients with mild-to-moderate asthma and COPD. Serum, induced sputum and exhaled breath condensate IL-6 and IL-33 levels, as well as their expression in bronchial mucosa were evaluated in 22 asthma and 33 COPD patients...
January 10, 2018: COPD
https://www.readbyqxmd.com/read/29317573/ultrasensitive-sensor-based-on-nano-cu-polyaniline-nickel-foam-for-monitoring-h-sub-2-sub-o-sub-2-sub-in-exhaled-breath
#5
Aifeng Liu, Jing Liang, Rongguang Shi, Zongshan Zhao, Yong Tian
A sensitive, rapid and easy operated sensor for hydrogen peroxide (H2O2) determination in exhaled breath was developed in this study. The polyaniline (PANI) film and Cu nanoparticles were successively electrochemical deposited on the surface of the three-dimensional nickel foam, i.e., synthetized nano-Cu/polyaniline/nickel foam. The Ni foam facilitates the charge and mass transfer, and it also provides a large amount of anchoring sites for Cu nanoparticle deposition. The synergistic electro-catalytic actions between Cu nanoparticles and PANI highly enhanced the reduction current of H2O2...
January 10, 2018: Journal of Breath Research
https://www.readbyqxmd.com/read/29316316/serum-but-not-exhaled-breath-condensate-periostin-level-is-increased-in-competitive-athletes
#6
Marcin Kurowski, Janusz Jurczyk, Marzanna Jarzębska, Aleksandra Wardzyńska, Hubert Krysztofiak, Marek L Kowalski
INTRODUCTION: Periostin is a matricellular protein expressed by many tissues. Its release may be enhanced, among others, through mechanical stimulation of muscles and bones as well as by cytokines of allergic inflammation. OBJECTIVES: Our aim was to assess periostin levels in serum and exhaled breath condensate (EBC) of professional athletes, asthmatics and healthy controls. We also sought to determine whether acute treadmill exercise influences serum and EBC periostin...
January 8, 2018: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/29313659/full-color-camouflage-in-a-printable-photonic-blue-colored-polymer
#7
Monali Moirangthem, Albertus P H J Schenning
A blue reflective photonic polymer coating which can be patterned in full color, from blue to red, by printing with an aqueous calcium nitrate solution has been fabricated. Color change in the cholesteric liquid crystalline polymer network over the entire visible spectrum is obtained by the use of non-reactive mesogen. The pattern in the coating is hidden in the blue color dry state and appears on exposure to water or by exhaling breath onto it due to different degrees of swelling of the polymer network. The degree of swelling depends on the printed amount of calcium which acts as a crosslinker...
January 9, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29297703/cancer-breath-testing-a-patent-review
#8
K M Mohibul Kabir, William A Donald
Human breath can contain thousands of volatile organic compounds (VOCs) and semi-volatile compounds that are related to metabolism and other biochemical processes. The presence of cancer cells can affect the identity and abundances of chemicals in breath when compared to those in healthy control subjects, which can be used to indicate the likelihood of a patient having cancer. Recently, the chemical analysis of exhaled breath from patients has been shown to be promising for diagnosing many different types of cancers, including lung, breast, colon, head and neck and prostate and pre-cancerous conditions (dysplasia)...
January 3, 2018: Expert Opinion on Therapeutic Patents
https://www.readbyqxmd.com/read/29295966/analysis-of-volatile-organic-compounds-in-the-breath-of-patients-with-stable-or-acute-exacerbation-of-chronic-obstructive-pulmonary-disease
#9
Alex Pizzini, Wojciech Filipiak, Johannes Wille, Clemens Ager, Helmut Wiesenhofer, Robert Kubinec, Jaroslav Blasko, Christoph Tschurtschenthaler, Christopher A Mayhew, Günter Weiss, Rosa Bellmann-Weiler
Chronic obstructive pulmonary disease (COPD) is a major cause of death worldwide. Acute exacerbations (AECOPD), caused by infectious and non-infectious agents, contribute to an increase in mortality. The diagnostic procedure of AECOPD is mainly based on clinical features. The aim of this pilot study was to identify whether volatile organic compounds (VOCs) in breath could be used to discriminate for acute exacerbated COPD. Three patient groups were included in this controlled study: AECOPD patients (n= 14, age mean ± SD: 71...
January 3, 2018: Journal of Breath Research
https://www.readbyqxmd.com/read/29290405/ct-ventilation-imaging-derived-from-breath-hold-ct-exhibits-good-regional-accuracy-with-galligas-pet
#10
Enid M Eslick, John Kipritidis, Denis Gradinscak, Mark J Stevens, Dale L Bailey, Benjamin Harris, Jeremy T Booth, Paul J Keall
BACKGROUND AND PURPOSE: CT ventilation imaging (CTVI) derived from four dimensional CT (4DCT) has shown only moderate spatial accuracy in humans due to 4DCT image artefacts. Here we assess the accuracy of an improved CTVI using high quality exhale/inhale breath-hold CT (BHCT). MATERIALS AND METHODS: Eighteen lung cancer patients underwent exhale/inhale BHCT, 4DCT and Galligas PET ventilation scans in a single imaging session. For each BHCT and 4DCT scan, we performed deformable image registration (DIR) between the inhale and exhale phase images to quantify ventilation using three published metrics: (i) breathing induced lung density change, CTVIDIR-HU (ii) breathing induced volume change CTVIDIR-Jac and (iii) the regional air-tissue product, CTVIHU Spatial accuracy was reported as the voxel-wise Spearman correlation r between CTVI and Galligas PET...
December 28, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29290104/priorities-for-future-research-into-asthma-diagnostic-tools-a-pan-eu-consensus-exercise-from-the-european-asthma-research-innovation-partnership-earip
#11
L Garcia-Marcos, J Edwards, E Kennington, P Aurora, E Baraldi, S Carraro, M Gappa, R Louis, A Moreno-Galdo, D G Peroni, M Pijnenburg, K N Priftis, M Sanchez-Solis, A Schuster, S Walker
The diagnosis of asthma is currently based on clinical history, physical examination and lung function; and to date there are no accurate objective tests either to confirm the diagnosis or to discriminate between different types of asthma. This consensus exercise reviews the state-of-the-art in asthma diagnosis to identify opportunities for future investment based on the likelihood of their successful development, potential for widespread adoption and their perceived impact on asthma patients. Using a two-stage e-Delphi process and a summarising workshop, a group of European asthma experts including health professionals, researchers, people with asthma and industry representatives ranked the potential impact of research investment in each technique or tool for asthma diagnosis and monitoring...
December 31, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29288465/numerical-comparison-of-nasal-aerosol-administration-systems-for-efficient-nose-to-brain-drug-delivery
#12
Jingliang Dong, Yidan Shang, Kiao Inthavong, Hak-Kim Chan, Jiyuan Tu
PURPOSE: Nose-to-brain drug administration along the olfactory and trigeminal nerve pathways offers an alternative route for the treatment of central nervous system (CNS) disorders. The characterization of particle deposition remains difficult to achieve in experiments. Alternative numerical approach is applied to identify suitable aerosol particle size with maximized inhaled doses. METHODS: This study numerically compared the drug delivery efficiency in a realistic human nasal cavity between two aerosol drug administration systems targeting the olfactory region: the aerosol mask system and the breath-powered bi-directional system...
December 29, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/29284685/oxidative-stress-biomarkers-and-asthma-characteristics-in-adults-of-the-egea-study
#13
Miora Andrianjafimasy, Farid Zerimech, Zeina Akiki, Helene Huyvaert, Nicole Le Moual, Valérie Siroux, Régis Matran, Orianne Dumas, Rachel Nadif
Asthma is an oxidative stress related disease, but associations with asthma outcomes are poorly studied in adults. We aimed to study the associations between several biomarkers related to oxidative stress and various asthma outcomes.Cross-sectional analyses were conducted in 1388 adults (mean age 43 years, 44% with asthma) from the Epidemiological Study of the Genetics and Environment of Asthma (EGEA2). Three blood antioxidant enzyme activities (biomarkers of response to oxidative stress) and exhaled breath condensate 8-isoprostanes and plasma fluorescent oxidation products (FlOPs) levels (two biomarkers of damage) were measured...
December 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29283360/the-influence-of-dilution-on-the-offline-measurement-of-exhaled-nitric-oxide
#14
Victoria MacBean, Dharmika Pooranampillai, Catherine Howard, Alan Charles Lunt, Anne Greenough
Measurement of fractional exhaled nitric oxide (FeNO) is used to determine the presence and severity of eosinophilic airway inflammation in asthma and other wheezing illnesses. The gold standard of online measurement during a single prolonged exhalation is not suitable for use in young children. The international guidelines for offline measurements recommend collection of exhaled gas in an appropriate reservoir for later analysis in young children. The apparatus required for gas collection, however, creates dead space within the system, which may result in sample dilution and hence inaccuracy...
December 28, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/29280625/water-resistant-polymeric-acid-membrane-catalyst-for-acetone-detection-in-the-exhaled-breath-of-diabetics
#15
Adam D Worrall, Zexin Qian, Jonathan Bernstein, Anastasios P Angelopoulos
Endogenous volatile organic compounds (VOC's) such as acetone in exhaled human breath are associated with metabolic conditions in the bloodstream. Development of compact, rapid detectors of exhaled breath chemical compo-sition in clinical settings is challenging due to the small sample size that can be collected during a single exhalation as well as spectroscopic interference by the abundance of water. In this paper, we show that the activity of a catalytic polymer membrane (Nafion® 117) toward the heterogeneous condensation reaction of immobilized resorcinol reagent with gas-phase acetone can be preserved even at 100% ambient relative humidity through the incorporation of organic acids such as vanillic or tiglic...
December 27, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29277689/aerosol-delivery-during-spontaneous-breathing-with-different-types-of-nebulizers-in-vitro-ex-vivo-models-evaluation
#16
Hui-Ling Lin, Tien-Pei Fang, Hui-Sun Cho, Gwo-Hwa Wan, Meng-Jer Hsieh, James B Fink
BACKGROUND: Nebulizers for spontaneous breathing have been evaluated through different study designs. There are limitations in simulated bench models related to patient and nebulizer factors. The aim of this study was to determine the correlation of inhaled drug mass between in vitro and ex vivo studies by testing aerosol deposition of various types of nebulizers. METHODS: Ten healthy subjects were recruited to receive aerosol therapy with five nebulizers in random order: 1) a jet nebulizer (JN); 2) a breath-enhanced nebulizer (BEN); 3) a manually triggered nebulizer (MTN), 4) a breath-actuated nebulizer (BAN), and 5) a vibrating mesh nebulizer (VMN) with valved-adapter...
December 19, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29277437/indoor-air-quality-iaq-evaluation-of-a-novel-tobacco-vapor-ntv-product
#17
Hirokazu Ichitsubo, Misato Kotaki
The impact of using a Novel Tobacco Vapor (NTV) product on indoor air quality (IAQ) was simulated using an environmentally-controlled chamber. Three environmental simulations were examined; two non-smoking areas (conference room and dining room) and one ventilated smoking area (smoking lounge). IAQ was evaluated by (i) measuring constituents in the mainstream NTV product emissions, (ii) and by determining classical environmental tobacco smoke (ETS) and representative air quality markers. Analysis of the mainstream emissions revealed that vapor from the NTV product is chemically simpler than cigarette smoke...
December 22, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/29273025/exhaled-breath-condensate-metabolome-clusters-for-endotype-discovery-in-asthma
#18
Anirban Sinha, Koundinya Desiraju, Kunal Aggarwal, Rintu Kutum, Siddhartha Roy, Rakesh Lodha, S K Kabra, Balaram Ghosh, Tavpritesh Sethi, Anurag Agrawal
BACKGROUND: Asthma is a complex, heterogeneous disorder with similar presenting symptoms but with varying underlying pathologies. Exhaled breath condensate (EBC) is a relatively unexplored matrix which reflects the signatures of respiratory epithelium, but is difficult to normalize for dilution. METHODS: Here we explored whether internally normalized global NMR spectrum patterns, combined with machine learning, could be useful for diagnostics or endotype discovery...
December 22, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29248433/physiotherapy-breathing-retraining-for-asthma-a-randomised-controlled-trial
#19
Anne Bruton, Amanda Lee, Lucy Yardley, James Raftery, Emily Arden-Close, Sarah Kirby, Shihua Zhu, Manimekalai Thiruvothiyur, Frances Webley, Lyn Taylor, Denise Gibson, Guiqing Yao, Mark Stafford-Watson, Jenny Versnel, Michael Moore, Steve George, Paul Little, Ratko Djukanovic, David Price, Ian D Pavord, Stephen T Holgate, Mike Thomas
BACKGROUND: Despite effective pharmacotherapy, asthma continues to impair quality of life for most patients. Non-pharmacological approaches, including breathing retraining, are therefore of great interest to patients. However, clinicians rarely advocate breathing retraining and access to this intervention is restricted for most patients due to the limited availability of suitable physiotherapists and poor integration of breathing retraining into standard care. We aimed to assess the effectiveness of a digital self-guided breathing retraining intervention...
December 13, 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/29247906/long-term-monitoring-of-breath-methane
#20
Daniela Polag, Frank Keppler
In recent years, methane as a component of exhaled human breath has been considered as a potential bioindicator providing information on microbial activity in the intestinal tract. Several studies indicated a relationship between breath methane status and specific gastrointestinal disease. So far, almost no attention has been given to the temporal variability of breath methane production by individual persons. Thus here, for the first time, long-term monitoring was carried out measuring breath methane of three volunteers over periods between 196 and 1002days...
December 13, 2017: Science of the Total Environment
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