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Multi Breath Nitrogen Washout (MBNW) as a Measure of Small Airway Function in Patients With Respiratory Disease

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified September 2005 by Bayside Health.
Recruitment status was:  Recruiting
The Alfred
Information provided by:
Bayside Health Identifier:
First received: September 11, 2005
Last updated: July 25, 2007
Last verified: September 2005
The researchers are investigating a novel technique, the multi breath nitrogen washout technique, to measure airway changes in various respiratory diseases.

Cystic Fibrosis Asthma Bronchiolitis Obliterans Lung Transplantation

Study Type: Observational
Study Design: Observational Model: Defined Population
Observational Model: Natural History
Time Perspective: Cross-Sectional
Time Perspective: Prospective
Official Title: Measurements of Inhomogeneity of the Small Airway With Patients With Cystic Fibrosis, Asthma and Bronchiolitis Obliterans Syndrome (Post Transplant) Using the Multi Breath Nitrogen Washout Technique

Resource links provided by NLM:

Further study details as provided by Bayside Health:

Estimated Enrollment: 90
Study Start Date: September 2004
Detailed Description:
It is well documented that there are significant ventilatory changes in respiratory diseases such as cystic fibrosis, asthma and the onset of bronchiolitis obliterans syndrome (BOS) following chronic rejection of lung transplantation. At present, we use measures such as spirometry and lung biopsies to determine the changes of airway function and disease severity. Our aim is to develop a novel technique called the multi breath nitrogen washout (MBNW) which we believe is able to measure the inhomogeneity of ventilation in both the larger airways (conductive region, generation 1 - 16) as well as the smaller airways (acinar region 17 - 23). Our belief is that these measurements are much more subtle than current techniques and will be more sensitive in measuring large and small airway changes in disease. The MBNW can also give us an insight as to which particular zones of the lung are affected in differing respiratory disease. For example, it is believed that BOS begins at the distal portion of the lung (acinar region) and proceeds towards the proximal zone (conductive). However, at present no current techniques can differentiate between damage to the acinar zone and the conductive zone or indeed accurately measure small airway (acinar zone) function. We believe the the MBNW has the capacity to do so.

Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Doctor diagnosed cystic fibrosis, asthma
  • Lung transplant recipient

Exclusion Criteria:

  • Smoke history of less than 10 pack years
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00163696

Contact: Bruce Thompson ++61 3 9276 3476

Australia, Victoria
Alfred Hospital Recruiting
Melbourne, Victoria, Australia, 3004
Contact: Bruce Thompson    ++61 3 9276 3476   
Sponsors and Collaborators
Bayside Health
The Alfred
Principal Investigator: Bruce Thompson Head of Physiology Services, Alfred Hospital
  More Information Identifier: NCT00163696     History of Changes
Other Study ID Numbers: MBNW alfred
Study First Received: September 11, 2005
Last Updated: July 25, 2007

Keywords provided by Bayside Health:
small airways
Lung Transplant recipients (Bronchiolitis Obliterans syndrome)

Additional relevant MeSH terms:
Cystic Fibrosis
Bronchiolitis Obliterans
Bronchial Diseases
Respiratory Tract Diseases
Lung Diseases, Obstructive
Lung Diseases
Respiratory Hypersensitivity
Hypersensitivity, Immediate
Immune System Diseases
Pathologic Processes
Pancreatic Diseases
Digestive System Diseases
Genetic Diseases, Inborn
Infant, Newborn, Diseases
Respiratory Tract Infections processed this record on September 21, 2017