Active clinical trials for "Asthma"

The aim of the study was to identify the percentage of patients in whom the diagnosis of current asthma was confirmed or ruled out after clinical, spirometric assessment and utilizing all the possible investigations with a six month follow up period for both groups.

Poor adherence to asthma controller medication may link to poor asthma outcome. A metered dose device with built-in dose counter helps physicians to monitor drug compliance in asthma patients. Mobile-phone based self management opens a window for better asthma control. The present study aims to investigate the relationship between the adherence to controller medication of combined inhaled corticosteroid/long acting beta2-agonists, assessing by integrated dose counter, and the level of airway inflammation and asthma control. Moreover, the investigators also use a new asthma self-management Apps to enhance drug compliance. With the application of the new, easily available tools, the investigator expect to increase adherence rates, and hence, to reduce airway inflammation and improve the level of asthma control.

An open label study in 40-60 subjects with diagnosed lung airway disease and in 10-20 normal controls. Each subject will receive PFP as a contrast agent to visualize the airway and alveolar spaces in their lungs using magnetic resonance imaging of inert gas/oxygen mixtures.

To determine if treatment of pre-school children with a history of wheeze who present to an Emergency Department with an acute wheezing episode with azithromycin for 5 days will resolve their symptoms more quickly, will require less short acting beta agonist (SABA), and allow these children to remain symptom free for a longer period of time.

Asthma among low-income, minority children remains a prime example of health disparities that are resistant to change. Demonstrations of reductions in disproportionate hospitalizations in controlled trials are limited. We performed a controlled clinical trial of an Asthma Coach to reduce hospitalizations among low-income, African American children.

The purpose of this study is to examine inflammatory processes in the airway of moderate to severe persistent asthmatics who have persistent bronchial hyperreactivity despite chronic administration of inhaled glucocorticoids.

This study evaluates the efficiency of ICS(budesonide) combined with LABA (formoterol) and LAMA(tiotropium) in the treatment of acute exacerbation of asthma-chronic obstructive pulmonary overlap. Half of participants will receive budesonide,formoterol and tiotropium in combination, while the other half will receive budesonide and formoterol only.

Novel asthma biomarkers to predict the response to inhaled corticosteroid Brief description: This will be a single center study of asthmatic subjects and healthy controls which will investigate mechanisms underlying different response to inhaled corticosteroid, the mainstay of asthma therapy. Only about half of the asthmatic patients have improved lung function after treatment of inhaled corticosteroid. The investigators hypothesize that there are biomarkers such as epithelial cytokines (IL-25, IL-33, TSLP) in airway tissues or plasma of asthmatic patients which could predict the response of asthmatic patients to inhaled corticosteroid. Finding novel asthma biomarker will help the clinicians to choose the optimal treatment for individual asthmatic patient.

Asthma, abbreviation for bronchial asthma, is one of the common chronic airways disease that threatens human health. Typical symptoms of asthma are recurrent wheezing, shortness of breath, chest tightness and cough, usually occurring at night or early morning. However, there are still some patients with only persistent clinical manifestations of chest tightness. Concerned about this group of patients, investigators presented a subgroup of bronchial asthma, namely, chest tightness variant asthma (CTVA). This asthma subgroup usually lacks asthma-specific clinical features such as wheezing, shortness of breath, wheezing, and therefore often misdiagnosed for a long time. However, there is lack of definite treatment strategy for CTVA. In order to further understand the clinical characteristics and treatment of patients with CTVA, investigators conducted a national multicenter randomized control trial(RCT) study that compares inhaled corticosteroid(ICS)/ long-acting beta2-agonist(LABA) + Montelukast with ICS/LABA. Finally, investigators plan to clarify whether ICS/LABA plus Montelukast is more appropriate treatment than only ICS/LABA in CTVA patients.

Cough variant asthma (CVA), subtype of bronchial asthma, is considered to be one of the most common causes of chronic cough in different cough guidelines of United States, Europe, China and other countries. From a multicenter survey in China, over one third of chronic cough is caused by CVA, which is higher than western countries. CVA differs from classic asthma, usually manifesting a symptom of only coughing without wheezing or dyspnea and particularly coughing at night. With less clinical manifestation and medical intervention, CVA patients are easily be neglected and misdiagnosed, and 30-40% of them will develop to typical asthma in the next few years. Currently there's no specific therapy recommendation for CVA in GINA. Although cough guidelines in China recommend that CVA patients should be treated as typical asthma, no recommendation on details about ICS/LABA dosage and duration. There are only a few sporadic CVA therapy researches with small sample size. Two studiesfound that CVA patients can't get cough symptom relief even after treating by low dose of ICS/LABA for 3 months. Some patients' cough symptom relapses during the 24-week follow-up phase after treating by ICS/LABA for 3 months. Overall, the best treatment of CVA is not yet clear. GINA 2018 emphasize that asthma need long-term management. Euro-SMART study found that budesonide/formoterol 2 inhalation twice daily plus as needed can reduce daytime asthma symptoms and night-time awakenings, as well as reduce exacerbation risk more than 1 inhalation twice daily. Based on the above reasons, We assume that increase the dosage of ICS/LABA can decrease relapse rate in CVA patients with severe cough. This multi-center, randomized, controlled clinical trial can help to clarify the best dosage of budesonide/formoterol of CVA in China.