E-nose and Inflammatory Asthma Phenotypes

December 31, 2013 updated by: Astrid Crespo

Inflammatory Asthma Phenotypes Discrimination by an Electronic Nose Breath Analyzer

Patients with persistent asthma have different inflammatory phenotypes. The electronic nose is a new technology capable of distinguishing volatile organic compound breath-prints in exhaled breath among different pulmonary diseases.

Question of the study. Is the electronic nose breath-print analysis able to discriminate among different inflammatory asthma phenotypes?

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Materials/patients and methods. Fifty-two consecutively enrolled patients with persistent asthma were included in a cross-sectional proof of concept study. Inflammatory asthma phenotypes were recognized by inflammatory cell counts in induced sputum. Breath-prints were analyzed by discriminant analysis on principal component reduction, resulting in cross-validated accuracy values. Receiver Operating Characteristics (ROC) was calculated.

Legal and ethical aspects The study was conducted in accordance with the Declaration of Helsinki principles (18th Word Medical Assembly, 1964) and was approved by the Clinical Research Ethics Committee (approval number: IIBSP/10/122/1161) of our institution. The participants provided their written informed consent to participate in this study and personal identification data were anonymized.

Study Type

Interventional

Enrollment (Actual)

52

Phase

  • Not Applicable

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

  • Spain
      • Barcelona, Spain, 08025
        • Vicente Plaza

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

18 years to 80 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

Adults with persistent asthma, defined as per the Global INitiative for Asthma Management (GINA) criteria, and specifically with positive bronchodilator test, or a daily peak expiratory flow (PEF) variability greater than 20%, or a positive methacholine challenge test documented in case history. Subjects were consecutively enrolled from the outpatient visits of a specialized Asthma Unit located in a tertiary University Hospital.

Exclusion Criteria:

Subjects were excluded if they had a respiratory tract infection or asthma exacerbation within 30 days prior to inclusion or were receiving oral steroids or immunosuppressive treatments.

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

  • Primary Purpose: Screening
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
No Intervention: enose
Electronic nose can discriminate the inflammatory asthma phenotypes, supporting their potential as a non-invasive alternative tool to induced sputum.
Other: electronic nose
Exhaled gas to assess e-nose VOC profiles was collected as described. Briefly, patients breathed through a mouthpiece into a 2-way nonrebreathing valve (Hans rudolph 2700, Hans rudolph, Kansas City, Mo) with an inspiratory VOC filter and an expiratory silica reservoir to dry the expired air. Expiratory air was collected in a 10-L "Tedlar bag". Within not more than 10 minutes, the bag was connected to the e-nose device (Cyranose 320®; Smith Detections, Pasadena, CA), provided with a 32 organic polymeric nano-composite sensor array, for 5 minutes and changes in the nano-sensor electrical resistance generated a breath-print VOC profile.
Other Names:
  • Cyranose 320®; Smith Detections, Pasadena, CA

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Inflammatory Asthma Phenotypes Discrimination by an Electronic Nose Breath Analyzer
Time Frame: 2 years
The recognition of volatile organic compound profiles in exhaled air by an electronic nose device can discriminate the inflammatory phenotype of patients with persistent asthma.
2 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Astrid Crespo

Investigators

  • Principal Investigator: Vicente Plaza, Department of Respiratory Medicine, Hospital de la Santa Creu i Sant Pau. Institut d'Investigació Biomédica Sant Pau (IIB Sant Pau). Universitat Autònoma de Barcelona, Department of Medicine. Barcelona Respiratory Network (BRN). Barcelona, Spain.

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Helpful Links

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)

June 1, 2013

Study Registration Dates

First Submitted

December 28, 2013

First Submitted That Met QC Criteria

December 31, 2013

First Posted (Estimate)

January 1, 2014

Study Record Updates

Last Update Posted (Estimate)

January 1, 2014

Last Update Submitted That Met QC Criteria

December 31, 2013

Last Verified

December 1, 2013

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 10/122/1161

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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