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https://www.readbyqxmd.com/read/28351016/nano-enabled-paper-humidity-sensor-for-mobile-based-point-of-care-lung-function-monitoring
#1
Mitradip Bhattacharjee, Harshal B Nemade, Dipankar Bandyopadhyay
The frequency of breathing and peak flow rate of exhaled air are necessary parameters to detect chronic obstructive pulmonary diseases (COPDs) such as asthma, bronchitis, or pneumonia. We developed a lung function monitoring point-of-care-testing device (LFM-POCT) consisting of mouthpiece, paper-based humidity sensor, micro-heater, and real-time monitoring unit. Fabrication of a mouthpiece of optimal length ensured that the exhaled air was focused on the humidity-sensor. The resistive relative humidity sensor was developed using a filter paper coated with nanoparticles, which could easily follow the frequency and peak flow rate of the human breathing...
March 22, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28332897/characteristics-of-non-smoking-adult-asthma-patients-with-chronic-airflow-limitation
#2
TunnRen Tay, Xuening Choo, Rosna Ihsan, Hsiao Peng Toh, Hang Siang Wong, Augustine Tee
OBJECTIVE: Chronic airflow limitation (CAL) can develop in a subgroup of patients with asthma. Characterising these patients is important because reduced lung function is a risk factor for adverse asthma outcomes. We hypothesised that heterogeneity in patients with CAL may be influenced by age at asthma onset. We first compared never-smoking asthma patients with and without CAL, and subsequently examined the differences between patients with late and early-onset asthma within the CAL cohort...
March 23, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28298259/phenotypic-analysis-of-asthma-in-japanese-athletes
#3
Keisuke Tsukioka, Toshiyuki Koya, Hiroshi Ueno, Masachika Hayashi, Takuro Sakagami, Takashi Hasegawa, Masaaki Arakawa, Eiichi Suzuki, Toshiaki Kikuchi
BACKGROUND: Asthma in athlete populations such as Olympic athletes has various pathogeneses. However, few reports are available on the features of asthma in the athlete population in clinical practice. In this study, we focused on classifying asthma in Japanese athlete population. METHODS: We performed a cluster analysis of data from pulmonary function tests and clinical biomarkers before administering inhaled corticosteroids (ICS) therapy in athlete population of individuals diagnosed with asthma (n = 104; male, 76...
March 12, 2017: Allergology International: Official Journal of the Japanese Society of Allergology
https://www.readbyqxmd.com/read/28275474/effects-of-leukotriene-d4-nasal-challenge-on-bronchial-responsiveness-and-inflammation-in-asthmatic-patients-with-allergic-rhinitis
#4
Zheng Zhu, Yanqing Xie, Weijie Guan, Yi Gao, Rongquan Huang, Shu Xia, Wenhua Jian, Zhiyu Liang, Jinping Zheng
BACKGROUND: In asthmatic patients with allergic rhinitis (AR), increased cysteinyl leukotrienes (CysLTs) production in the secretion of nasal mucosa has been associated with greater bronchial hyperresponsiveness (BHR) after nasal allergen challenge. However, the role of CysLTs in eliciting BHR after nasal allergen challenge has not been evaluated. The aim of this study is to evaluate the effect of LTD4 nasal challenge on BHR and inflammation in asthmatic patients with AR. METHODS: In this self-controlled study, fifteen eligible consecutively recruited subjects underwent methacholine (Mch) bronchial provocation test before and 30 minutes after LTD4 nasal provocation test...
February 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28264494/omalizumab-is-equally-effective-in-persistent-allergic-oral-corticosteroid-dependent-asthma-caused-by-either-seasonal-or-perennial-allergens-a-pilot-study
#5
Christian Domingo, Xavier Pomares, Albert Navarro, Núria Rudi, Ana Sogo, Ignacio Dávila, Rosa M Mirapeix
Omalizumab is marketed for chronic severe asthma patients who are allergic to perennial allergens. Our purpose was to investigate whether omalizumab is also effective in persistent severe asthma due to seasonal allergens. Thirty patients with oral corticosteroid-dependent asthma were treated with Omalizumab according to the dosing table. For each patient with asthma due to seasonal allergens, we recruited the next two consecutive patients with asthma due to perennial allergens. The dose of oral methyl prednisolone was tapered at a rate of 2 mg every two weeks after the start of treatment with omalizumab depending on tolerance...
February 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28245677/prospective-evaluation-of-respiratory-health-benefits-from-reduced-exposure-to-airborne-particulate-matter
#6
Yanhui Hao, Guanghui Zhang, Bin Han, Xiaowen Xu, Nannan Feng, Yong Li, Wei Wang, Haidong Kan, Zhipeng Bai, Yiliang Zhu, William Au, Zhao-Lin Xia
We aimed to investigate if short-term exposure to reduced particulate matter (PM) air pollution would affect respiratory function in healthy adults. We followed a cohort of 42 healthy participants from a community afflicted with severe PM air pollution to a substantially less polluted area for nine days. We measured daily airborne PM [with an aerodynamic diameter of less than 2.5 μm (PM2.5) and 10 μm (PM10)] and PM2.5 carbon component concentrations. Five repeated respiratory function measurements and fractional exhaled nitric oxide test were made for each participant...
April 2017: International Journal of Environmental Health Research
https://www.readbyqxmd.com/read/28243078/a-belgian-survey-on-the-diagnosis-of-asthma-copd-overlap-syndrome
#7
Didier Cataldo, Jean-Louis Corhay, Eric Derom, Renaud Louis, Eric Marchand, Alain Michils, Vincent Ninane, Rudi Peché, Charles Pilette, Walter Vincken, Wim Janssens
INTRODUCTION: Patients with chronic airway disease may present features of both asthma and COPD, commonly referred to as asthma-COPD overlap syndrome (ACOS). Recommendations on their diagnosis are diffuse and inconsistent. This survey aimed to identify consensus on criteria for diagnosing ACOS. METHODS: A Belgian expert panel developed a survey on ACOS diagnosis, which was completed by 87 pulmonologists. Answers chosen by ≥70% of survey respondents were considered as useful criteria for ACOS diagnosis...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28238403/increased-sputum-levels-of-thymus-and-activation-regulated-chemokine-in-children-with-asthma-not-eosinophilic-bronchitis
#8
M J Kim, H S Lee, I S Sol, M N Kim, J Y Hong, K E Lee, Y H Kim, K W Kim, M H Sohn, K-E Kim
BACKGROUND: Thymus and activation-regulated chemokine (TARC), a member of the CC chemokine family, plays a crucial role in Th2-specific inflammation. We aimed to determine the concentration of sputum TARC in children with asthma and eosinophilic bronchitis (EB) and its relation with eosinophilic inflammation, pulmonary function, and bronchial hyper-responsiveness. METHODS: In total, 90 children with asthma, 38 with EB, and 45 control subjects were enrolled. TARC levels were measured in sputum supernatants using an ELISA...
February 18, 2017: Allergologia et Immunopathologia
https://www.readbyqxmd.com/read/28216536/the-fraction-of-exhaled-nitric-oxide-feno-and-forced-oscillation-technique-fot-can-predict-bronchial-hyperresponsiveness-against-acetylcholine-in-treated-asthmatics
#9
Masanori Fukuhara, Takahiro Tsuburai, Yuto Nakamura, Yasuhiro Tomita, Yuto Hamada, Kentaro Watai, Hiroaki Hayashi, Yousuke Kamide, Kiyoshi Sekiya, Chihiro Mitsui, Yuma Fukutomi, Akio Mori, Masami Taniguchi
BACKGROUND: The bronchial hyperresponsiveness (BHR) test is useful to diagnose or evaluate effect of therapy in asthmatics, but invasive. On the other hands, the fraction of exhaled nitric oxide (FENO) is a useful noninvasive marker of eosinophilic airway inflammation in asthmatics. And also, the forced oscillation technique (FOT) is a noninvasive method that is used to measure respiratory mechanics, including respiratory resistance and reactance at multiple frequencies. AIM: To evaluate the complementary roles of FENO and FOT to predict bronchial hyperresponsiveness in adult stable asthmatic patients taking inhaled corticosteroids...
2017: Arerugī, [Allergy]
https://www.readbyqxmd.com/read/28179442/t-helper-cell-type-2-th2-and-non-th2-molecular-phenotypes-of-asthma-using-sputum-transcriptomics-in-u-biopred
#10
Chih-Hsi Scott Kuo, Stelios Pavlidis, Matthew Loza, Fred Baribaud, Anthony Rowe, Iaonnis Pandis, Ana Sousa, Julie Corfield, Ratko Djukanovic, Rene Lutter, Peter J Sterk, Charles Auffray, Yike Guo, Ian M Adcock, Kian Fan Chung
Asthma is characterised by heterogeneous clinical phenotypes. Our objective was to determine molecular phenotypes of asthma by analysing sputum cell transcriptomics from 104 moderate-to-severe asthmatic subjects and 16 nonasthmatic subjects.After filtering on the differentially expressed genes between eosinophil- and noneosinophil-associated sputum inflammation, we used unbiased hierarchical clustering on 508 differentially expressed genes and gene set variation analysis of specific gene sets.We defined three transcriptome-associated clusters (TACs): TAC1 (characterised by immune receptors IL33R, CCR3 and TSLPR), TAC2 (characterised by interferon-, tumour necrosis factor-α- and inflammasome-associated genes) and TAC3 (characterised by genes of metabolic pathways, ubiquitination and mitochondrial function)...
February 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28159392/arsenic-exposure-alters-lung-function-and-airway-inflammation-in-children-a-cohort-study-in-rural-bangladesh
#11
Sultan Ahmed, Evana Akhtar, Adity Roy, Ondine S von Ehrenstein, Marie Vahter, Yukiko Wagatsuma, Rubhana Raqib
Exposure to arsenic has been associated with increased risk of reduced lung function in adults, but the adverse impacts in early life are unclear. We aim to examine whether prenatal and childhood arsenic exposure is associated with reduced lung function and increased airway inflammation in school-aged children. Children born in the MINIMat cohort in rural Bangladesh were evaluated at 9years of age (n=540). Arsenic exposure was assessed in urine (U-As) that was collected from mothers during early pregnancy and their children aged 4...
April 2017: Environment International
https://www.readbyqxmd.com/read/28145647/relationship-between-fractional-exhaled-nitric-oxide-level-and-efficacy-of-inhaled-corticosteroid-in-asthma-copd-overlap-syndrome-patients-with-different-disease-severity
#12
Jia Xi Feng, Yun Lin, Jian Lin, Su Su He, Mei Fang Chen, Xiao Mai Wu, You Zu Xu
This study explored the relationship between the fractional exhaled nitric oxide (FeNO) level and the efficacy of inhaled corticosteroid (ICS) in asthma-chronic obstructive pulmonary disease (COPD) overlap syndrome (ACOS) patients with different disease severity. A total of 127 ACOS patients with ACOS (case group) and 131 healthy people (control group) were enrolled in this study. Based on the severity of COPD, the ACOS patients were divided into: mild ACOS; moderate ACOS; severe ACOS; and extremely severe ACOS groups...
March 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/28144134/evaluation-of-carbon-dioxide-rebreathing-during-exercise-assisted-by-noninvasive-ventilation-with-plateau-exhalation-valve
#13
Yong-Er Ou, Zhi-Min Lin, Dong-Ming Hua, Ying Jiang, Ya-Ting Huo, Qun Luo, Rong-Chang Chen
Noninvasive ventilation with a plateau exhalation valve (PEV) is often used as an adjunct to exercise to achieve a physiologic training effect in severe chronic obstructive pulmonary disease (COPD) patients. However, during exercise, with the increase of exhalation flow and respiratory rate and limited capability of PEV to exhale gases out of the circuit, it is still unknown whether CO2 rebreathing occurs in COPD patients ventilated during exercise assisted by single-limb circuit with a PEV. A maximal symptom-limited cycle exercise test was performed while ventilated on pressure support (inspiratory:expiratory pressure 14:4 cmH2O) in 18 male patients with stable severe COPD (mean ± standard deviation, forced expiratory volume in 1 s: 29...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28135110/the-influence-of-17-hours-of-normobaric-hypoxia-on-parallel-adjustments-in-exhaled-nitric-oxide-and-airway-function-in-lowland-healthy-adults
#14
Erik H Van Iterson, Eric M Snyder, Bruce D Johnson
Van Iterson, Erik H., Eric M. Snyder, and Bruce D. Johnson. The influence of 17 hours of normobaric hypoxia on parallel adjustments in exhaled nitric oxide and airway function in lowland healthy adults. High Alt Med Biol. 18:1-10, 2017.-Currently, there is a disparate understanding of the role that normobaric hypoxia plays in affecting nitric oxide (NO) measured in exhaled air (eNO) and airway function in lowland healthy adults. Compared to normobaric normoxia, this study aimed to test the effect of 17 hours of normobaric hypoxia on relationships between eNO and airway function in healthy adults...
March 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28126433/two-inflammatory-phenotypes-of-nasal-polyps-and-comorbid-asthma
#15
Dawei Wu, Lun Li, Min Zhang, Jianting Wang, Yongxiang Wei
BACKGROUND: Nasal polyps and comorbid asthma (NPCA) is a common united airway disease. However, the inflammatory phenotyes of NPCA are not clear. OBJECTIVE: To identify inflammatory phenotypes of NPCA. METHODS: A total of 106 patients diagnosed with NPCA were recruited from rhinologic clinics. A combined method of biopsies from nasal polyps and fractional exhaled nitric oxide (FeNO) was used to explore inflammatory phenotyes of NPCA. Patients were evaluated with respect to clinical, functional, and inflammatory parameters...
March 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28114141/lung-function-in-women-with-idiopathic-central-precocious-puberty-a-pilot-study%C3%A2
#16
Virginia Murri, Franco Antoniazzi, Michele Piazza, Paolo Cavarzere, Claudia Banzato, Attilio Boner, Rossella Gaudino
BACKGROUND: Studies have reported that women with early menarche (≤10 years) have lower lung function. AIM: To investigate lung function in women with a history of idio pathic central precocious puberty (ICPP) treated during childhood with gonadotropin-releasing hormone agonist (GnRHa). METHODS: ICPP women (n = 23) were compared with healthy age-matched controls (n = 23). Subjects were clinically evaluated by means of a questionnaire, baseline and post-β<Sub>2</Sub> agonist spirometry, impulse oscillometry (a measure of airway resistance), and measurement of fractional exhaled nitric oxide (FeNO)...
2017: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/28068290/a-collection-system-for-dry-solid-residues-from-exhaled-breath-for-analysis-via-atomic-force-microscopy
#17
Victor N Morozov, Andrey Y Mikheev
Exhaled air contains sub-micron droplets of lung liquid, which potentially bear biomarkers of lung diseases. After dehydration they form dry residue particles (DRPs). As a first step in developing techniques to characterize individual DRPs, a new electrostatic collector was designed in which DRPs are charged within a unipolar corona charger, concentrated in a cone funnel, and deposited onto a limited area of a highly oriented pyrolytic graphite surface. The collector captures 80%-90% of DRPs at an optimal flow rate of 0...
January 9, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28065396/inhaled-corticosteroid-dose-response-in-asthma-should-we-measure-inflammation
#18
William J Anderson, Philip M Short, Sunny Jabbal, Brian J Lipworth
BACKGROUND: Inhaled corticosteroid (ICS) titration in asthma is primarily based on symptoms and pulmonary function. ICSs may not be increased on this basis despite residual airway inflammation. OBJECTIVE: To compare the dose-response relationships of ICSs on measures of pulmonary function, symptoms, and inflammation in patients with persistent asthma. METHODS: We performed a pooled post hoc analysis of 121 patients with mild to moderate asthma from 4 randomized clinical trials that incorporated an ICS dose ramp...
January 3, 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28056907/lung-function-in-very-low-birth-weight-infants-after-pharmacological-and-surgical-treatment-of-patent-ductus-arteriosus-a-retrospective-analysis
#19
Payman Barikbin, Hannes Sallmon, Silke Wilitzki, Joachim Photiadis, Christoph Bührer, Petra Koehne, Gerd Schmalisch
BACKGROUND: The indications and strategies for treatment of patent ductus arteriosus (PDA) are controversial, and the safety and long-term benefits of surgical PDA closure remain uncertain. The aim of this study was to compare the lung function of very low birth weight (VLBW) infants after successful PDA treatment with a cyclooxygenase inhibitor or secondary surgical ligation. METHODS: A total of 114 VLBW infants (birth weight < 1500 g), including 94 infants (82%) with a birth weight < 1000 g, who received treatment for hemodynamically significant PDA (hsPDA), were examined at a median postmenstrual age of 48 weeks...
January 6, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28046287/su-f-j-120-evaluation-of-the-combined-effect-of-body-orientation-and-breathing-on-organ-movement-in-thorax-using-multi-step-deformable-image-registration
#20
C Guy, E Weiss, S Che, W Sleeman, N Mukhopadhyay, M Rosu
PURPOSE: Use deformable registration to map more complex anatomies that include changes associated with both different body positions and breathing, and evaluate the resultant respiratory excursions for tumors and relevant organs at risk. METHODS: Same-day exhale and inhale datasets from prone and supine 4D CT scans of lung cancer patients have been registered using the Elastix software package through a 3 step process: (1) rigid registration for bony alignment (2) deformable multiresolution B-Spline registration of entire anatomy (3) deformable multiresolution B-Spline registration of lung parenchyma (to improve lung vasculature alignment)...
June 2016: Medical Physics
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