Search results for "COPD"

Design and evaluation of a 32-channel phased-array coil for lung imaging with hyperpolarized 3-helium

2010

Imaging with hyperpolarized 3-helium is becoming an increasingly important technique for MRI diagnostics of the lung but is hampered by long breath holds (>20 sec), which are not always applicable in patients with severe lung disease like chronic obstructive pulmonary disease (COPD) or α-1-anti-trypsin deficiency. Additionally, oxygen-induced depolarization decay during the long breath holds complicates interpretation of functional data such as apparent diffusion coefficients. To address these issues, we describe and validate a 1.5-T, 32-channel array coil for accelerated 3He lung imaging and demonstrate its ability to speed up imaging 3He. A signal-to-noise ratio increase of up to a factor…

Cigarette smoke alters the EZH2/DAB2IP expression in bronchial epithelial cells. A risk factor for lung cancer in COPD patients

2016

Cigarette smoke is an environmental risk factor for COPD and Lung cancer, leading causes of morbidity and mortality worldwide. In cancer, enhancer of zeste homolog 2 (EZH2) silenced disabled homolog 2 interacting protein gene (DAB2IP) (tumor-suppressor gene) bytri-methylation of lysine 27 on histone H3 (H3K27me3). We studied EZH2 and DAB2IP expression in airway epithelial cells from COPD patients and their potential involvement in the progression of COPD toward lung cancer. We assessed EZH2 and DAB2IPimmunoreactivity in bronchial epithelial cells from surgical specimens of COPD patients and healthy control subjects (HC) by immunohistochemistry. Bronchial epithelial cell line (16HBE), primar…

Extracorporeal shock waves increase markers of cellular proliferation in primary bronchial fibroblasts of COPD patients

2019

COPD is due to a remodeling of small airways and destruction of the lung parenchyma with loss of the alveolar attachment as a result of pulmonary emphysema. Treatment of connective tissue fibroblasts with extracorporeal shock waves (ESW) increases their cellular proliferation and differentiation. To date no studies are available on ESW treatment of human primary bronchial fibroblasts from COPD and control subjects. Primary bronchial fibroblasts were obtained from bronchial biopsies from three patients with mild/moderate COPD and 3 control smokers with normal lung function. After stabilization for 24h, 1 ml of cell suspension (106 cells) from COPD and controls was treated in 2 ml tubes with …

A Study of the Effect of Proinflammatory Cytokines on the Epithelial Cells of Smokers, With or Without COPD

2011

Introduction: Cigarette smoke is the main cause of inflammation in COPD. The mechanisms that differentiate smokers who develop COPD are diverse. In this study, we analyzed the presence of cytokines in the respiratory secretions of smokers with or without COPD and the secretory properties of the differentiated bronchial epithelium obtained from the individuals themselves after exposure to tobacco smoke. Material and methods: Twenty-seven smokers were studied, 12 of whom had COPD that had not been previously treated with steroids. In 11, samples were obtained by means of induced sputum, and the remaining samples were collected from bronchial aspiration after bronchoscopy. Concentrations of IL…

2 years in the life of COPD patients: Evolution of GOLD 2011 classification in the 'real-life' DACCORD study

2016

Introduction Limited data are available on the progression of COPD categorised according to GOLD 2011. We analysed data from the ongoing, non-interventional, observational DACCORD study and compared baseline GOLD 2011 categorisation with that of 1 and 2-years after inclusion. Methods Patients with a diagnosis of COPD were recruited into DACCORD following either a change or initiation of maintenance medication. Baseline exacerbations data (collected over 6 months) were annualised for GOLD categorisation at baseline; COPD symptoms were evaluated using the COPD Assessment Test (CAT) at baseline as well as the 1 year and 2 year visit. Data on exacerbations were collected every 3 months up to 2 …

Automatic bilevel ventilation in sleep-disordered breathing: A real-life experience in southern Italy

2016

Automatic bilevel ventilation (AutoBI) has been recently introduced to treat obstructive sleep-disordered breathing (SDB), but clinical experience is still limited. We revised the charts of patients treated for obstructive SDB in our sleep clinic in 2015 (n=214) to assess the frequency of trials of AutoBI ventilators (ResMed Auto25 or Respironics BiFlex), the clinical characteristics of these patients, the reason to shift from CPAP to AutoBI, and the outcome of AutoBI titration. A trial of domiciliary AutoBI was made in 44 patients (20.5%) intolerant to CPAP due to high CPAP levels (n=11) or who showed incomplete resolution of SDB on CPAP (n=33). The table reports the clinical data accordin…

In vitro dose comparison of Respimat<sup>®</sup> inhaler with dry powder inhalers for COPD maintenance therapy

2017

Background Combining in vitro mouth-throat deposition measurements, cascade impactor data and computational fluid dynamics (CFD) simulations, four different inhalers were compared which are indicated for chronic obstructive pulmonary disease (COPD) treatment. Methods The Respimat inhaler, the Breezhaler, the Genuair, and the Ellipta were coupled to the idealized Alberta throat model. The modeled dose to the lung (mDTL) was collected downstream of the Alberta throat model using either a filter or a next generation impactor (NGI). Idealized breathing patterns from COPD patient groups - moderate and very severe COPD - were applied. Theoretical lung deposition patterns were assessed by an indiv…

Seasonal Distribution Of Exacerbations In The Poet-COPD; Study

2011

Retrospective Analysis On Selection Criteria For Clinical Trials In An Unselected COPD Outpatient Population

2013

Predictors for early readmission after COPD exacerbation

2019

Aim: Identify predictors for early readmission in patients with COPD and severe exacerbation. Material and methods: Prospective study (July 2017-June 2018) that included all patients hospitalized for an acute exacerbations of COPD. Demographic date, clinical and spirometric parameters, arterial blood gases, length of stay, and evolutive parameters were collected. We used univariate and multivariate statistical techniques to identify risks for readmission. Results: 278 consecutive patients were enrolled. During the follow-up 31 (11%) patients were admitted within 30 days of discharge (early readmission). Univariate analysis showed that FEV1 (p=0.02), FEV1 (%) (p=0.01), total dose of steroids…