View clinical trials related to Respiratory Hypersensitivity.
Filter by:The prevalence of airway hyperresponsiveness (AHR) is very high in elite swimmers, reaching 80% in certain studies. Repeated Chlorine-derivatives exposure may be a major causative factor for its development. Asthma diagnosis is generally made on the basis of clinical characteristics. The demonstration of a variable bronchial obstruction through positive expiratory flow reversibility to a bronchodilator, spontaneous variations of airway obstruction or a positive provocation test (methacholine, eucapnic voluntary hyperpnoea…) is necessary to avoid false diagnosis. Currently asthma treatment in swimmers is the same as in the general population. A short-acting bronchodilator is often prescribed to avoid occasional symptoms, combined with an inhaled corticosteroid or an antagonist of Leukotriene if asthma symptoms are persistent. Previous studies have shown a reduced efficiency for asthma medication in elite athletes compared with non-athletes. The specific response to different medications remains to be studied in athletes. The effects of a short-acting bronchodilator in swimmers with AHR, especially when asymptomatic, on pulmonary function and performance have not yet been studied. Moreover, the significance of a positive bronchial provocation test remains to be studied in asymptomatic swimmers with AHR.
The study objective is to investigate in a placebo-controlled, double-blind manner the effect of inhaled corticosteroid (ciclesonide) on airway hyperresponsiveness measured as having PD15 mannitol. Treatment medication will be administered as follows: 320 microgram ciclesonide or placebo will be inhaled once daily. The study duration consists of a treatment period of 4 weeks. The study will provide further data on safety of ciclesonide.
Intraoperative bronchospasm challenges anesthesia's safety. This study aims to investigate high concentration of exhaled nitric oxide as a marker of intraoperative bronchospasm.
Certain lung disease medications can influence diagnostic tests and research investigations. This study will investigate how long ipratropium bromide must be withheld before a methacholine challenge test can be conducted. This information will be useful for validating current guidelines.
This double-blind, stratified, parallel group study is to determine whether aiming for 'Total control' results in better airway hyper-responsiveness than maintaining the treatment level at which 'Well-controlled' asthma was achieved. The primary endpoint is the mean change in PC20 methacholine. Well controlled subjects (as assessed after a 12 week run-in period) will enter a 24 week treatment period during which they will record PEF(Peak Expiratory Flow), symptoms, rescue beta2-agonist use over 24 hours, night time awakenings, asthma exacerbations, emergency visits due to asthma and Adverse Events. At every visit lung function measurements and airway hyper-responsiveness will be measured.
The trial is performed to assess efficacy and safety of the Allergopharma house dust mite allergoid in bronchial asthma.
The primary objective is to demonstrate the non-inferiority of ciclesonide compared to beclomethasone-HFA in the occurrence of Class 1 lens event for nuclear (NO), cortical (C), or posterior subcapsular (P) lens opacification within 12 months. Secondary objectives are to compare ciclesonide and beclomethasone with respect to class II and class III best corrected visual acuity and intraocular pressure from baseline to 12 months.