Steven I Rennard

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COPD is a heterogeneous collection of conditions that can affect various structures within the lung in a number of different ways. These various processes can all result in limitation of expiratory airflow. If severe enough, this physiologic abnormality defines COPD. The various conditions that can lead to this syndrome are prevalent and often relentlessly(More)
Phosphodiesterases (PDEs) are important modulators of inflammation and wound healing. In this capacity, specific targeting of PDEs for the treatment of many diseases, including chronic obstructive pulmonary disease (COPD), has been investigated. Currently, treatment of COPD is suboptimal. PDE4 modulates the inflammatory response of the lung, and inhibition(More)
Diseases characterized by airway inflammation, excessive airway secretion, and airway obstruction affect a substantial proportion of the population. These diseases include asthma, chronic bronchitis, bronchiectasis, and cystic fibrosis. Asthma and chronic bronchitis may affect 25 million persons in the United States. Much progress has been made in the last(More)
BACKGROUND There is notable heterogeneity in the clinical presentation of patients with COPD. To characterise this heterogeneity, we sought to identify subgroups of smokers by applying cluster analysis to data from the COPDGene study. METHODS We applied a clustering method, k-means, to data from 10 192 smokers in the COPDGene study. After splitting the(More)
BACKGROUND There is insufficient evidence about the long-term course of depressive symptom trajectories and their impact among patients with COPD. METHODS We analysed 3-year data obtained from patients with COPD participating in the Evaluation of COPD Longitudinally to Identify Predictive Surrogate Endpoints study. Patients were split into four groups on(More)
The majority of patients with chronic obstructive pulmonary disease may derive benefit from bronchodilator therapy, particularly those patients with severe disease. Currently, three classes of bronchodilator are available: anticholinergics, beta 2-adrenergic agonists and methyl-xanthines. Several factors should be considered when choosing a bronchodilator.(More)
  • S I Rennard
  • Respiration; international review of thoracic…
  • 1992
Bronchoalveolar lavage (BAL) can provide diagnostic information in cases of primary and metastatic disease to the lung. Diagnostic material can be obtained in about 50% of primary lung cancers, with more accuracy in bronchoalveolar cell carcinoma and adenocarcinoma than in squamous cell carcinoma. The diagnostic yield for cytologic examination is comparable(More)
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