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Analysis of Exhaled Breath by Biosensors in Adults With Asthma

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ClinicalTrials.gov Identifier: NCT00819676
Recruitment Status : Completed
First Posted : January 9, 2009
Last Update Posted : August 3, 2009
Sponsor:
Collaborator:
Merck Sharp & Dohme LLC
Information provided by:
Catholic University of the Sacred Heart

Tracking Information
First Submitted Date January 8, 2009
First Posted Date January 9, 2009
Last Update Posted Date August 3, 2009
Study Start Date January 2009
Actual Primary Completion Date July 2009   (Final data collection date for primary outcome measure)
Current Primary Outcome Measures
 (submitted: January 8, 2009)
exhaled nitric oxide [ Time Frame: baseline ]
Original Primary Outcome Measures Same as current
Change History
Current Secondary Outcome Measures
 (submitted: January 8, 2009)
  • analysis of breath by biosensors [ Time Frame: baseline ]
  • FEV1 [ Time Frame: baseline ]
  • FVC [ Time Frame: baseline ]
  • FEV1/FVC ratio [ Time Frame: baseline ]
  • FEF25%-75% [ Time Frame: baseline ]
  • PEF [ Time Frame: baseline ]
Original Secondary Outcome Measures Same as current
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
 
Descriptive Information
Brief Title Analysis of Exhaled Breath by Biosensors in Adults With Asthma
Official Title Analysis of Exhaled Breath by Biosensors in Adults With Asthma: Observational Part of the Study "Effects of add-on Therapy With Oral Montelukast on the Analysis of Exhale Breath by Biosensors in Adults With Asthma
Brief Summary

The aim of this study is to investigate the pattern of organic volatile compounds (VOCs) in the exhaled breath detected by biosensors in adults with persistent mild asthma. The analysis of VOCs detected by biosensors in asthmatic adults will be compared with that in a control group of healthy subjects and with exhaled nitric oxide (NO).

Identification of breath VOC patterns may be a completely noninvasive new technique for assessing airway inflammation. A device containing a series of nanosensors can be used for breath analysis of VOC patterns through integration with a suitable algorithm for pattern recognition.

Preliminary data indicate that exhaled breath patterns detected by biosensors in healthy subjects are different from those in patients with asthma. In patients with asthma, analysis of exhaled breath using biosensors will be compared with exhaled NO measurement for studying a possible correlation with an independent method for assessing airway inflammation and with spirometry for assessing a possible correlation with lung function.

Measurement of exhaled NO is a well-established, validated, and standardized method for assessing and monitoring of airway inflammation in patients with asthma who are steroid-naive. In patients with asthma, exhaled NO concentrations are correlated with blood eosinophil cell counts and with airway hyperresponsiveness (AHR).

This study could contribute to the identification and development of a completely new non-invasive technique for assessing airway inflammation with important implications for diagnosis and therapeutic monitoring of patients with asthma.

Establishing the effect of anti-inflammatory drugs on breath analysis by biosensors in patients with asthma is relevant for future studies aimed to use this technique in asthma management.

Detailed Description Not Provided
Study Type Observational
Study Design Observational Model: Case-Control
Time Perspective: Cross-Sectional
Target Follow-Up Duration Not Provided
Biospecimen Not Provided
Sampling Method Non-Probability Sample
Study Population asthma clinic, community sample
Condition Asthma
Intervention
  • Other: analysis of exhaled breath by biosensors
  • Other: measurement of exhaled nitric oxide
Study Groups/Cohorts
  • subjects with asthma
    Interventions:
    • Other: analysis of exhaled breath by biosensors
    • Other: measurement of exhaled nitric oxide
  • healthy subjects
    Interventions:
    • Other: analysis of exhaled breath by biosensors
    • Other: measurement of exhaled nitric oxide
Publications * Montuschi P, Santonico M, Mondino C, Pennazza G, Mantini G, Martinelli E, Capuano R, Ciabattoni G, Paolesse R, Di Natale C, Barnes PJ, D'Amico A. Diagnostic performance of an electronic nose, fractional exhaled nitric oxide, and lung function testing in asthma. Chest. 2010 Apr;137(4):790-6. doi: 10.1378/chest.09-1836. Epub 2010 Jan 15.

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Recruitment Information
Recruitment Status Completed
Actual Enrollment
 (submitted: July 31, 2009)
47
Original Estimated Enrollment
 (submitted: January 8, 2009)
45
Actual Study Completion Date July 2009
Actual Primary Completion Date July 2009   (Final data collection date for primary outcome measure)
Eligibility Criteria

Inclusion Criteria:

  • Patient is male or female, at least 15 years of age and no more than 70 years.
  • Patient has mild persistent asthma (step 2) of the Guidelines for the Diagnosis and Management of Asthma issued by the National Heart, Lung, and Blood Institute of the National Institutes of Health as defined by a history of symptoms at least once a week but less than daily (step 2) (5).
  • Current asthma treatment includes short-acting inhaled β-agonist alone as needed.
  • Patient fulfils all the following signs and symptoms of asthma:

    • History of symptoms including, but not limited to dyspnea, wheezing, chest tightness, cough, or sputum production for at least 12 months.
    • A forced expiratory volume in one second (FEV1) of at least 80% of the predicted value (pre-bronchodilator) while withholding β-agonist for at least six hours.
    • Patient has a diagnosis of asthma as defined by 1) an increase in FEV1 or PEF of ≥12% (absolute value), 20 to 30 minutes after inhaled β-agonist administration, OR 2) a positive methacholine PC20 (provocative concentration causing a 20% fall in FEV1) of 8 mg/ml or lower which was performed within the previous 12 months, OR 3) a fall in FEV1 of at least 15% after an exercise challenge which was performed within the previous 12 months. β-agonist reversibility and the methacholine and exercise challenge tests may be satisfied within the previous 12 months if there is adequate source documentation.
    • Patients demonstrate symptoms requiring β-agonist use on ≥2 and ≤6 days of the week for the previous two weeks.
  • Patient is able to chew a tablet.
  • Patient is judged to be in good, stable physical and mental health (except for his/her asthma) based on the medical history, physical examination, and routine laboratory data, and appears able to successfully complete this trial.
  • Ability to perform reproducible spirometry.
  • Nonsmoker including no use of smokeless tobacco products in the past year.
  • Ability of parent to provide informed consent, as evidenced by signing a copy of the consent form approved by the institutional review board of the subject's respective study institution

Exclusion Criteria: none

Sex/Gender
Sexes Eligible for Study: All
Ages 15 Years to 70 Years   (Child, Adult, Older Adult)
Accepts Healthy Volunteers Yes
Contacts Contact information is only displayed when the study is recruiting subjects
Listed Location Countries Italy
Removed Location Countries  
 
Administrative Information
NCT Number NCT00819676
Other Study ID Numbers A/220/2007
Has Data Monitoring Committee Yes
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement Not Provided
Current Responsible Party Paolo Montuschi, M.D. Associate Professor of Pharmacology, Catholic University of the Sacred Heart
Original Responsible Party Same as current
Current Study Sponsor Catholic University of the Sacred Heart
Original Study Sponsor Same as current
Collaborators Merck Sharp & Dohme LLC
Investigators
Principal Investigator: Paolo Montuschi, M.D. Catholic University of the Sacred Heart
PRS Account Catholic University of the Sacred Heart
Verification Date July 2009