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Effect of Temperature Controlled Laminar Airflow (TLA) on the Peripheral Bronchial Airway in Asthma

This study has been completed.
Sponsor:
Collaborators:
Croel AB
Commitum AB
Information provided by:
Airsonett AB
ClinicalTrials.gov Identifier:
NCT00986934
First received: September 29, 2009
Last updated: November 8, 2010
Last verified: November 2010
History of Changes
  Purpose

The purpose of this study is to determine whether clean air administered to the breathing zone with Temperature regulated Laminar Airflow (TLA) during night is effective as add on treatment in patients with perennial allergic asthma.


Condition Intervention Phase
Asthma
 Device: Protexo (Temperature controlled Laminar Airflow (TLA))
Device: Placebo TLA
 Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Effects of Airsonett Airshower on the Peripheral Bronchial Airway in Asthmatic Children. Measurements of Lung Clearing Index, Volume of Trapped Gas, Alveolar Nitric Oxide, PAQLQ

Resource links provided by NLM:

MedlinePlus related topics: Asthma Gas
U.S. FDA Resources

Further study details as provided by Airsonett AB:

Primary Outcome Measures:
  • Measurements of lung clearing index. [ Time Frame: Week 0, 12 and 52 ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Measurements of volume of trapped gas. [ Time Frame: Week 0, 12 and 52 ] [ Designated as safety issue: No ]
  • Measurements of alveolar nitric oxide [ Time Frame: Week 0, 12 and 52 ] [ Designated as safety issue: No ]
  • Paediatric Asthma Quality of Life Questionnaire (PAQLQ,7-18 yrs of age) in parallel to miniAQLQ (>=12 yrs of age) [ Time Frame: Week 0, 12 and 52 ] [ Designated as safety issue: No ]

Enrollment: 45
Study Start Date: March 2008
Study Completion Date: February 2010
Primary Completion Date: January 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Temeperature controlled Laminar Airflow
Active treatment with Temperature controlled Laminar Airflow (TLA).
 Device: Protexo (Temperature controlled Laminar Airflow (TLA))
Nocturnal environmental control with Temperature controlled Laminar Airflow (TLA)
Other Names:
  • Protexo
  • TLA
Placebo Comparator: Placebo TLA
Placebo TLA treatment
 Device: Placebo TLA
Placebo TLA (without filtration and TLA function)

Detailed Description:

Exposure to inhaled allergens is a pathogenetic factor in allergic asthma. However, physical, chemical and combined methods aiming to reduce airborne allergen levels have shown little or no effect in reducing asthma symptoms in people who are sensitive to perennial allergens.

Aims and objectives: This study aims to investigate treatment with Temperature regulated Laminar Airflow (TLA) with a very low particle concentration directed to the breathing zone of subjects with allergic asthma during night sleep. The hypothesis is that the decreased allergen exposure during the night will have a positive effect on the peripheral bronchial airway. Measurements of lung clearing index, volume of trapped gas, alveolar nitric oxide, PAQLQ.

Method: This is a double blind, randomized 52 week parallel trial comparing active and placebo treatment with TLA. For ethical reasons the randomization is 2 to 1 for active and placebo treatment, respectively. A 2 weeks run-in period is inserted between inclusion and randomization. First 12 weeks an unchanged maintenance medication will be kept and week 13-52 medication will be modified to obtain asthma control according to international guidelines (GINA). After inclusion, run-in, randomization and baseline measurements active/placebo treatment with AA will be implemented over 52 weeks.

  Eligibility

Ages Eligible for Study:   7 Years to 70 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Consent to participate voluntarily.
  • Willing and able to comply with the study specific procedures.
  • Signed Informed Consent prior to any study procedure.
  • Perennial allergic asthma
  • Age 7 through 70 years at time of randomization.
  • A miniAQLQ/PAQLQ score of ≤ 5.5.
  • Sensitive to pet allergen and/or house dust mites as demonstrated by changed to RAST 0.70 or positive skin prick test (wheal reaction similar to histamine control).
  • Daily maintenance dose of at least ICS >=200µg/day of budesonide or >=100µg/day of fluticasone since at least 6 months
  • Features of partly controlled asthma according to GINA

Exclusion Criteria:

  • Current smoker (Non-smoker is defined as abstinent since > 1 year). Children: Parents'indoor smoking.
  • Participation in another allergen avoidance program
  • Participation in drug trial the preceding 3 months
  • Multiple chemical sensitivity (e.g. paint, petrol, perfumes) as primary etiology
  • Allergen injection or sublingual treatment in the preceding 2 years
  • ICS ≥1200µg/day of budesonide or 1000µg/day of fluticasone
  • Significant cardiovascular disease
  • Participation in the present trial of a family member within the same household
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT00986934

Locations
Sweden
Astrid Lindgren Children s Hospital, Children's Department, Karolinska Hospital
Stockholm, Sweden, SE 171 76
Sponsors and Collaborators
Airsonett AB
Croel AB
Commitum AB
Investigators
Principal Investigator: Christophe Pedroletti, PhD, MD Astrid Lindgren Children's Hospital, Children's Department, Karolinska Hospital, Stockholm, Sweden
  More Information

No publications provided

Responsible Party: Dr. Christophe Pedroletti, head of activity, Astrid Lindgren Children's Hospital, Children's Department, Karolinska Hospital, Stockholm, Sweden
ClinicalTrials.gov Identifier: NCT00986934     History of Changes
Other Study ID Numbers: Air 3-03-04, Main protocol Air 3-03 (4A)
Study First Received: September 29, 2009
Last Updated: November 8, 2010
Health Authority: Sweden: Medical Products Agency
Sweden: Regional Ethical Review Board

Keywords provided by Airsonett AB:
Temperature regulated Laminar Airflow
TLA
Protexo
Perennial allergy
Peripheral bronchial airway
 Lung clearing index
Volume of trapped gas
Alveolar nitric oxide
Paediatric Asthma Quality of Life Questionnaire (PAQLQ)
Environmental control

Additional relevant MeSH terms:
Asthma
Bronchial Diseases
Respiratory Tract Diseases
Lung Diseases, Obstructive
Lung Diseases
Respiratory Hypersensitivity
Hypersensitivity, Immediate
Hypersensitivity
Immune System Diseases
Nitric Oxide
Bronchodilator Agents
Autonomic Agents
Peripheral Nervous System Agents
 Physiological Effects of Drugs
Pharmacologic Actions
Anti-Asthmatic Agents
Respiratory System Agents
Therapeutic Uses
Free Radical Scavengers
Antioxidants
Molecular Mechanisms of Pharmacological Action
Neurotransmitter Agents
Endothelium-Dependent Relaxing Factors
Vasodilator Agents
Cardiovascular Agents
Protective Agents

ClinicalTrials.gov processed this record on May 23, 2013