- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01645397
Exhaled Nitric Oxide and Airway Caliber in Children With Asthma
January 15, 2014 updated by: Patricia Breitwieser, Atlantic Health System
The purpose of this study is to assess if in steroid naïve asthmatic children with elevated baseline exhaled nitric oxide, treatment with inhaled steroid and normalization of exhaled nitric oxide level results in restoration of the bronchodilator response to deep inhalation.
Study Overview
Status
Completed
Conditions
Detailed Description
Previous studies have shown that a deep inhalation (DI) would increase airway caliber in normal subjects.
Whereas in asthmatics with spontaneous bronchoconstriction (obstruction of the airway), DI was shown to worsen airway obstruction.
The mechanism for this variability in response to DI is not well-understood, but seems to be a key in understanding the pathophysiology of the disease, and possibly in the development of an effective therapy.
Air way inflammation resulting in airway wall thickening and peribronchial edema is thought to play a role how the airway responds to deep inhalation.
This study assess if reduction in airway inflammation (as measured by level of exhaled NO)results in optimization of the bronchodilator response to deep inhalation
Study Type
Observational
Enrollment (Actual)
20
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
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New Jersey
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Morristown, New Jersey, United States, 07960
- Goryeb Children's Hospital, Atlantic Health
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
6 years and older (Child, Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Sampling Method
Non-Probability Sample
Study Population
Children, six years of age or older, with asthma attending asthma clinic
Description
Inclusion Criteria:
- Age: > 6 years at age of screening.
- Physician diagnosed asthma
- Elevated exhaled NO at initial evaluation (>25ppb)
- Be able to reproducibly perform DI maneuvers and all other pulmonary function testing
- Be clinically stable for at least 2 weeks prior to screening with no evidence of acute upper or lower respiratory infection or current pulmonary exacerbation.
- Has not been on inhaled or oral steroid for at least 4 weeks prior to enrollment in the study.
- Parent/child willingness to enroll in the study and provide written informed consent.
- Be able to present for the required study visits.
Exclusion Criteria:
- Chest wall or spinal column deformity; known cardiac, neuromuscular, or other chronic diseases
- Use of beta agonist, theophylline, leukotriene receptor antagonists, or caffeine-containing soft drinks 12 hr prior to the study.
- Use of inhaled steroid in the past 4 weeks.
- Respiratory infection or asthma exacerbation in the previous 2 weeks
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
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Asthma, elevated exhaled NO
Children with asthma with elevated exhaled NO at initial evaluation (>25ppb)
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in M/P40 ratio from baseline at 4 weeks of treatment with inhaled steroid
Time Frame: at baseline and 4 weeks later
|
M/P40 ratio is defined as the ratio of flow at 40% of FVC (forced vital capacity) on the flow-volume curve after maximal inspiration to flow at 40% of FVC on the flow-volume curve after partial (60%-70% of FVC) inspiration (M/P40 ratio)
|
at baseline and 4 weeks later
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in Ratio of post DI to pre DI airway resistance from baseline at 4 weeks of treatment with inhaled steroid
Time Frame: at baseline and 4 weeks later
|
Post-DI to pre-DI airway resistance at 5 Hz (R5) ratio (as measured by impulse oscillometry) from baseline (elevated exhaled NO) to 4-6 weeks of treatment.
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at baseline and 4 weeks later
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Dagnachew Assefa, MD, Atlantic Health
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
June 1, 2011
Primary Completion (Actual)
June 1, 2013
Study Completion (Actual)
August 1, 2013
Study Registration Dates
First Submitted
June 23, 2011
First Submitted That Met QC Criteria
July 18, 2012
First Posted (Estimate)
July 20, 2012
Study Record Updates
Last Update Posted (Estimate)
January 16, 2014
Last Update Submitted That Met QC Criteria
January 15, 2014
Last Verified
January 1, 2014
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- R10-06-013
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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