Active clinical trials for "Asthma"

The long-range goal of this protocol is to more completely understand the risks and the pathophysiology of asthma exacerbations, in order to develop prevention strategies and/or expedite a return to complete control of baseline asthma symptoms.

The objective of the investigators pilot study is to assess the pharmacokinetic profile of two corticosteroid drugs, prednisone and prednisolone, in children who present to the pediatric emergency department with an asthma exacerbation. The investigators hypothesis is that the pharmacokinetic profile in this population will be similar to healthy children and adults.

Limitation of activity is one of the main item used by composites scores designed to assess the level of asthma control. Since this item is systematically subjectively assessed by the patient, the investigators would like to know if these subjective data are correlated with objective data. Aims of this study are: 1) To describe what means "limitation of activity" for asthma patients and how they deal with; 2) To describe the objective exercise capacity and characteristics of daily activity in two situations (on exacerbation, out of an exacerbation).

To evaluate the role of maternal diet and birth weight in the etiology of childhood asthma and other allergic disorders.

To identify the role of irritant exposure in adult-onset asthma by simultaneously using both clinical and case control methods in a community-based perspective study of asthma incidence.

To examine the role of family processes in asthma regulation in three groups of children with mild to moderate asthma.

To evaluate the concordance of the most frequently used words by the patients and the physicians to express asthma symptoms, according to the patient's level of asthma control.

Asthma is a chronic inflammatory condition in which the airways develop increased responsiveness to various stimuli such as exposure to an allergen, cold air or exercise. It is characterized by airway hyper-responsiveness, inflammation, increased mucus production, and airway obstruction. Since inflammation is an important feature of asthma, the use of non-invasive tests to measure lung inflammation to monitor asthma are of interest.The purpose of the study is to relate costs associated with healthcare utilization and loss of work and school time to the primary health outcome of cumulative number of symptom-free days. This will enable the researchers to determine whether the costs of monitoring exhaled NO to regular management strategy in recently diagnosed asthma will be offset by reductions in other costs of asthma-related care, and, if not, whether the additional costs are likely to be acceptable in terms of the improvement in health outcomes as measured by the additional number of symptom-free days.

The purpose of the study is to conduct a cross-sectional study to examine asthma prevalence and morbidity in a predominately minority, low-income population in rural Arkansas.

This study is investigating how commonly exercise-induced asthma happens in athletes and the best way to diagnose exercise-induced asthma. Exercise-induced asthma describes narrowing of the airways in the lungs that occurs in certain people when they exercise. This can cause shortness of breath, cough, and fatigue during exercise and can impair athletic performance. Exercise-induced asthma can be difficult to diagnose. This is a research study, because the investigators are examining the best way to document a diagnosis of exercise-induced asthma. The investigators are also interested in examining why exercise-induced asthma may occur.