View clinical trials related to Respiratory Hypersensitivity.
Filter by:The study investigates the inspiratory duty cycle in subjects with and without airway hyper-responsiveness both at rest and during a bronchoprovocation challenge. The primary goal is to determine an average inspiratory duty cycle for standard use in the calculation of bronchoprovocation test results.
In asthmatics with airway hyperresponsiveness and a "T2 immune signature" (type 2), Dupilumab will suppress airway hyperresponsiveness (assessed by methacholine PC20 ≤ 4 mg/mL (PC20: provocative concentration causing a 20% fall in FEV1) OR ≥15% decreased in forced expired volume in 1 second (FEV1) during saline inhalation for sputum induction OR ≥25% improvement in FEV1 after bronchodilator) and airway eosinophilia (assessed by sputum eosinophils) and this will be associated with greater asthma control and improved ventilation heterogeneity.
A phase 2, multicentre, randomized, double-blind, placebo-controlled, parallel group study to evaluate the effect of tezepelumab on airway inflammation in adults with inadequately controlled asthma.
Propeller Health is collaborating with the City of Louisville and other local partners to carry out a focused demonstration project that will evaluate the effectiveness of the Propeller Health approach to asthma management while exploring means to use real-time data on asthma exacerbations in a public health setting. The Asthma Data Innovation Demonstration Project (ADID) will use wireless sensor technology to develop spatial and temporal data on the use of rescue inhalers by 120 study subjects with asthma in the Louisville metropolitan area. Propeller Health will process these data to support two general strategies. Asthma self management: Rescue inhaler actuation data will be compiled into individualized feedback reports to support asthma self management. Propeller Health will combine information on individual rescue inhaler actuations with evidence-based asthma management tips into real-time reports that will be provided to subjects. ADID staff will evaluate any resulting improvements in asthma control that may be based on this information. Subjects may share reports with their healthcare providers. Municipal purposes: The second strategy is to provide aggregated and de-identified, spatial and temporal asthma rescue inhaler actuation data to City personnel and authorized public health researchers in Louisville. These data will show the times and locations of the use of rescue inhalers by the 120 study subjects throughout the greater Louisville area. ADID staff will work with City personnel and researchers to investigate how this unprecedented level of detailed information on exacerbations can be used best to increase public awareness of environmental triggers while supporting public health surveillance efforts around respiratory diseases.
This is a single-center, double-blind, randomized trial utilizing a three-period, balanced block design, with each period comprising a unique study product administration. The treatments studied are PBF-680 5 mg, PBF-680 20 mg and placebo, as an orally administered capsule. The study includes a screening visit, a selection visit, three visits for the randomized treatment sequence, and an end-of-study follow-up visit, spanning through a 65-day maximum study duration. The study will be conducted on 18 male or female adults aged ³18 years, with a diagnosis of stable, mild to moderate asthma as per GINA guidelines, with no smoking or less than a 5 packs-years smoking history history, responsive to AMP airway challenge as determined in the selection visit. The primary efficacy variable will be the PC20 yielded from AMP airway challenge testing at the three treatment visits. FeNO, sampled at three time points at each treatment period visit, will be a exploratory variable. Safety assessment will include monitoring of adverse events, physical examination, vital signs, EKGs, spirometry, serum and urine pregnancy tests, and laboratory determinations. Blood sampling at a time-point series will provide pharmacokinetics data. The primary variable of the study is PC20, mg×mL-1. The PC 20 distributions will be analyzed by treatment using ANOVA for repeated measurements, followed by post hoc pairwise comparisons as appropriate. Other analyses will comprise FeNO, pharmacokinetics, data sets generated from baseline characteristics and safety assessments, and discretionary expiratory analyses to evaluate the influence of baseline and clinical covariates on the primary variable.
Control of airway inflammation is the cornerstone of asthma management. The aim of the present pilot study was to assess whether, and in which magnitude, a leukotriene receptor antagonist (LTRA) added to a basic treatment of inhaled corticosteroids (ICS) + long-acting betamimetics (LABA) might improve airway hyperresponsiveness and inflammation in well-controlled patients with asthma.
The purpose of this study is to study differences in small airways (<2mm) parameters in asthma patients, subjects with asymptomatic airway hyperresponsiveness and healthy controls.
Current asthma medicines include inhalers. A common type of inhaler is called a 'beta-agonist' (e.g. salbutamol). They improve asthma symptoms by stimulating areas in the airway causing it to widen. Although these drugs are useful short term, long term use can make asthma worse in some people. 'Beta-blockers' are the complete opposite type of medication. Just now they are avoided in patients with asthma. Beta-blockers cause problems in asthmatics in the short term, including severe asthma attacks. The other mainstay of inhaler treatment for asthma is inhaled steroid or 'preventer' medication. These work by dampening down the inflammation in the lungs that occurs in asthma. New research has suggested that longer term use of beta-blockers can also reduce airway inflammation which may improve asthma control. This research was done in asthmatic patients who didn't need inhaled steroids to control their asthma. At the moment the investigators are studying to see if there is a benefit of beta-blocker use for asthma over and above asthmatics own usual doses of inhaled steroids. In this study, the investigators will be trying to find out if adding a beta blocker to a smaller dose of steroid inhaler has the same effect on asthma control as just using a higher dose of steroid inhaler by itself.
Background: Increased serum high sensitivity C-reactive protein (hs-CRP) has been associated with airway inflammation in asthma and may serve as a surrogate marker for the presence of airway hyper-responsiveness (AHR) in this set-up. This study was designed to evaluate the predictive value of hs-CRP for AHR assessed by metacholine challenge test (MCT), in adults with suspected Asthma.
Alcohol has consequences including increased risk for upper respiratory tract infections, pneumonia, acute respiratory distress syndrome (ARDS), and alcohol-induced asthma. The investigators have established that airways are specifically impacted by alcohol exposure because the airways are heavily exposed to the vapor phase of alcohol during drinking. These preliminary studies demonstrate that brief alcohol administration significantly attenuates airway hyperresponsiveness (AHR) in a mouse model leading to the hypothesis that alcohol exposure modifies airway hyperresponsiveness through a cAMP/NO- dependent mechanism.