Active clinical trials for "Asthma"

To identify risk factors for work disability among adults with asthma treated by pulmonary and allergy specialists.

This study will examine the movement of T cells (a type of white blood cell) from the blood to the lungs in patients with asthma after exposure to an allergen, such as cat dander or pollen. Asthma is in large part due to inflammation of the bronchi (the breathing tubes of the lungs), causing heat, swelling and redness. T cells play a major role in the inflammatory reaction. A better understanding of T cell migration to the lungs after allergen exposure may lead to improved therapies for asthma. Patients between 18 and 50 years of age with mild allergic asthma may be eligible for this study. In addition, patients and healthy normal volunteers between 18 and 65 years of age may participate in a sub-study (blood draw) of this protocol. Participants will undergo the following procedures: Visit 1 (screening visit) Blood tests for blood counts and HIV Urine pregnancy test for women of childbearing potential. Visit 2 Physical examination and electrocardiogram (EKG) Prick skin testing - A drop of allergen extract is put on the skin and the underlying skin is scratched with a needle. A positive test resembles an insect bite and may itch. Intradermal skin tests - Increasing concentrations of a drop of diluted allergen are injected into the skin and the allergic response is monitored until a 5-mm swelling (1/4 inch) swelling develops. Methacholine challenge - The subject has repeated pulmonary function (breathing) tests after breathing methacholine, a drug that temporarily (for 5 to 10 minutes) worsens asthma symptoms. Physician evaluation and repeat pulmonary function test Visit 3 - Allergen bronchoprovocation - This test will be done in patients whose physical evaluation and breathing test permit them to continue with the study. A heparin lock (needle device that stays in a vein to allow multiple blood draws without repeated sticks) is placed. The subject breathes 5 breaths of allergen through a nebulizer (device that creates a mist), followed by a breathing test. This procedure will be repeated with increasingly higher allergen doses until lung function significantly declines or for a maximum of 6 doses. Subjects are monitored for 8 hours after the last dose. Blood samples of 50 ml each (3.5 tablespoons) are collected at 1, 3, 5 and 8 hours, and a physician evaluation is done at the end of the 8 hours. Additional 50-mm blood samples are collected the following two mornings. Visit 4 Physician evaluation, blood test for anemia and pulmonary function test Serial blood draws - 50 ml of blood will be drawn, followed by salt-water nebulization and another 50-ml blood draw after 1 hour. Additional 50-ml blood samples will be drawn 7 hours later and then on the next two mornings. Participants in the sub-study portion of this protocol will undergo the screening blood test, prick skin testing, breathing test after methacholine inhalation and a 100 ml-blood draw. These tests will be done in three sessions.

This is a multicentre, observational study focusing on exacerbation events in patients with severe eosinophilic asthma on Mepolizumab. Mepolizumab is an anti-IL5 (Interleukin 5) monoclonal antibody which blocks the eosinophilic activation pathways associated with decreasing asthma control. The pre-licensing studies have shown that Mepolizumab decreases asthma exacerbation events by approximately 50%, this study seeks to understand the underlying mechanisms of the remaining 50% of exacerbations. The study will enrol patients within GINA classification 4 and 5 who are known to difficult asthma services across four UK sites. Some patients will recently have been commenced on Mepolizumab, whilst others will be commenced on the drug on entry to the study. The patients will have baseline measurements of biomarkers, lung function, sputum analysis and quality of life questionnaires on study entry, after which patients will be asked to contact the clinic at the first signs of worsening asthma symptoms to arrange a clinic visit prior to commencing rescue treatment. They will be clinically assessed with review of peak flow and symptom diaries, measurements taken at baseline will be repeated and a decision on the nature of the exacerbation and treatment required will be made. This is an observational study, all outcomes will be exploratory.

A Non-Interventional Retrospective Study To Assess The Level Of Asthma Control Among Adults at 2 Tertiary Care Centres In Malaysia; Institute Of Respiratory Medicine (IPR) And Hospital Serdang. The specific objective of the study is to assess, in real-life clinical practice in Malaysia, the level of GINA-defined asthma control and the potential risk factors for uncontrolled disease in asthma patients

A multicenter, open, non-interventional, prospective, clinical observational study on Conformity to Therapy and Quality of Life in Asthma in patients living in Greece

The "Digital Health Tool for Parental Management of Childhood Asthma -- Impact on Asthma Control Test Scores" Study is a 16 week, prospective, intent-to-treat, 2-arm randomized controlled trial that aims to evaluate the impact of the Tueo Health program on asthma control as indicated by change in baseline and study end (week 16) score on the Childhood Asthma Control Test score (ages 6- under 12 years) and the Asthma Control Test (ages 12-17 years) in children with uncontrolled asthma as the primary study objective.

Deep inhalation (DI) dilates normal airway precontracted with methacholine. The fact that this effect is diminished or absent in asthma could be explained by the presence of bronchial inflammation. The hypothesis tested was that DI induces more relaxation in methacholine induced bronchoconstriction-solely determined by the smooth muscle contraction-than in exercise induced bronchoconstriction, which is contributed to by both smooth muscle contraction and airway wall inflammation.

This study will assess whether adaption of the Asthma Control Test (ACT) and childhood Asthma Control Test (cACT) for mobile devices improves rate of completion and improves control of asthma in children and adolescents

This project will be test the effect of probiotics on occupational allergic sensitization, respiratory symptoms and bronchial hyperresponsiveness in workers or students that develop respiratory symptoms exposed to laboratory animals, i.e., small rodents.

This is an exploratory randomised matched cohort pilot study. It is hypothesised that adolescents (aged 13-16 years) with asthma attending a secondary care outpatient asthma clinic, will disclose their smoking status to a doctor or nurse, if questioned alone without a parent present and if advised that they will have biological validation of their smoking status using a carbon monoxide monitor. It is a study of 30 subjects, who will be recruited over a period of 6 months.