Search results for "respiratory tract"
showing 10 items of 1170 documents
The Effect of Spirometry on Bronchial and Alveolar Nitric Oxide in Subjects with Asthma
2013
The effect of spirometric maneuvers on exhaled nitric oxide (NO) at the constant flow rate of 50 ml/s (FE(NO)) has been studied with equivocal results. Furthermore, the effects of spirometry on bronchial NO flux (J'aw(NO)) and alveolar NO (CA(NO)), two measurements increasingly being used in clinical and research protocols, are unknown. The aim of this study was to evaluate the effect of spirometry on FE(NO), J'aw(NO), and CA(NO) in adults with asthma.Forty-four adults with asthma were studied. To assess the impact of exhaled NO measurement itself on exhaled NO values, FE(NO), J'aw(NO), and CA(NO) were obtained twice, at baseline and after a resting period of 10 min. Then spirometry (with o…
Effect of QVA149 on lung volumes and exercise tolerance in COPD patients: The BRIGHT study
2014
Summary Introduction QVA149 is a novel, inhaled, once-daily dual bronchodilator containing a fixed-dose combination of the long-acting β 2 -agonist indacaterol and the long-acting muscarinic antagonist glycopyrronium (NVA237), for the treatment of chronic obstructive pulmonary disease (COPD). This study evaluated the effects of QVA149 on exercise tolerance, hyperinflation, lung function and lung volumes versus placebo and tiotropium. Methods Patients with moderate-to-severe COPD were randomized to QVA149 110/50 μg, placebo or tiotropium 18 μg once daily in a blinded, 3-period crossover study for 3 weeks. The primary endpoint was exercise endurance time at Day 21 for QVA149 versus placebo. R…
Is it possible to predict which patients with mild pneumonias will develop hypoxemia?
2009
SummaryUsually, mortality due to mild community-acquired pneumonias (CAP) (Pneumonia severity index (PSI) classes I–III) is low (<3%), but the appearance of hypoxemia significantly increases mortality. Our aim was to determine the clinical parameters associated with risk factors of developing hypoxemia in subjects with mild CAP (PSI I–III) and the clinical outcomes of the hypoxemic group.We analyzed clinical characteristics and the outcomes of patients with mild CAP and hypoxemia (PaO2/FiO2<300), in a prospective, multicenter cohort study of 1195 patients.Mild pneumonias (PSI I–III) were found in 645 cases (53.9%), of which 217 (33.6%) presented hypoxemia according to a PaO2/FiO2<300. Patie…
The Revised Asthma Problem Behavior Checklist: Adaptation for Use in Spanish Asthmatic Patients
1997
Behavioral problems associated with asthma management were examined in a group of 100 adult Spanish outpatients with asthma (57 women, 43 men; 17-69 years of age). All of them completed a Spanish version of the Revised Asthma Problem Behavior Checklist (RAPBC). Data about duration, severity, and self-management of asthma (self-efficacy expectancies and health care utilization), as well as dyspnea and FEV1, were also recorded. The highest-reliability Cronbach alpha indices were for the criteria related to emotions and behaviors that could precipitate asthma attacks. Concurrent criterion validity was examined first by Pearson correlations between the RAPBC scores and clinical data about asthm…
Gender Differences in Health‐Related Quality of Life Among Patients with Asthma
2004
This study has a twofold objective: 1) to explore to what extent suffering from asthma affects the HRQL of men and women differently at several stages of disease severity and 2) to analyze whether the informed poorer HRQL of asthmatic women is related to their higher scores on instruments measuring emotionally disordered symptoms. One hundred fifty-one outpatient asthmatics (84 women and 67 men) completed the Spanish versions of the Asthma Quality of Life questionnaire (AQL), as well as anxiety and depression inventories. A full history, physical examination, and pulmonary function test were performed on all subjects. Patients were classified into one of four asthma severity categories foll…
Reslizumab as add-on therapy in patients with refractory asthma
2020
### Key messages #### What is the key question? #### What is the bottom line? #### Why read on? Asthma is a common disease, affecting an estimated 334 million people worldwide, with considerable impact on quality of life and high associated costs.1–3 Asthma severity is assessed retrospectively from the level of treatment required to control symptoms and exacerbations. Approximately 5%–10% of patients with asthma are believed to suffer from severe disease.4 Patients with severe asthma typically require ongoing maintenance therapy with high-dose inhaled corticosteroid (ICS)/long-acting beta-agonist (LABA).2 Furthermore, systemic corticosteroids (SCS) are often required for potentially life-th…
Cigarette Smoking, But Not Sensitization toAlternaria, Is Associated with Severe Asthma in Urban Patients
2001
Hereditary susceptibility and allergen exposure have been identified as general risk factors for asthma. However, risk factors for severe asthma still remain to be identified. To further assess and quantify risk factors associated with severe asthma in adult patients apart from clinical exacerbations, 306 randomly selected subjects (mean age 40+/-17 years, 46% males) presenting to an inner city pulmonary practice between 1995 and 1996 were retrospectively investigated. Of these, 117 patients were atopic, 112 had current asthma, and 22 asthmatics had severe asthma. Risk factors associated with atopy were family history of atopy and any domestic pet ownership (OR: 3.1, 95% CI: 1.64-6.1). Asth…
Glutathione and glutathione peroxidase in sputum samples of adult patients with cystic fibrosis
2004
AbstractBackground: Reduced glutathione (GSH) is a major antioxidant in the lung. In cystic fibrosis (CF) patients, extracellular GSH levels of lower airways, obtained by bronchoalveolar lavage (BAL), were reported to be lower than non-CF individuals. Methods: Upper airway secretions of stable adult CF patients (29 spontaneous and 13 induced sputum) and non-CF individuals (14 healthy and 12 asthmatics; all induced sputum) were analyzed for total glutathione (i.e. the sum of reduced, GSH, and oxidized, GSSG, forms), GSH and GSSG levels by enzymatic kinetic assay. Results: In CF, both spontaneous and induced sputum samples were comparable in total glutathione levels which were surprisingly hi…
Predicting hypoxia in cystic fibrosis patients during exposure to high altitudes
2006
Abstract Background For patients with cystic fibrosis (CF)-related partial respiratory insufficiency and reduced arterial oxygen tension at ground level, the mild hypobaric environment on commercial jet aircraft poses the risk of severe hypoxemia. Thus, physicians should be able to estimate the extent of in-flight hypoxia. Objectives To derive tools for estimating the expected drop in arterial oxygen partial pressure (paO 2 ) and oxygen saturation (saO 2 ) in young adult CF patients with mild to moderate airway obstruction during exposure to the hypobaric conditions aboard commercial aircraft and to test the predictive power of a hypobaric chamber simulation. Methods Blood gases of 12 CF pa…
Airway remodelling assessed by sputum and high resolution computed tomography in asthma and COPD
2004
It is not known whether sputum elastase, metalloproteinase (MMP)-9 and tissue-inhibitor metalloproteinase (TIMP)-1 are related to structural changes of the airways, as assessed by high-resolution computed tomography (HRCT) scan. The relationships between these markers and the magnitude of structural changes of the airways in asthma and chronic obstructive pulmonary disease (COPD) were assessed. Induced sputum and HRCT scan were performed in 30 asthmatics (14 mild and 16 severe) and in 12 patients with COPD. A greater extent of HRCT scan abnormalities was found in COPD than in severe and mild asthmatics. HRCT scan abnormalities correlated with the degree of airway obstruction in COPD and in …