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Assessment of Reactance Parameters Measured by the Forced Oscillation Technique for the Bronchodilator Response in Subjects With Chronic Obstructive Pulmonary Disease (COPD)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT03910985
Recruitment Status : Not yet recruiting
First Posted : April 10, 2019
Last Update Posted : April 17, 2019
Information provided by (Responsible Party):
Marchand Eric, Centre Hospitalier Universitaire Dinant Godinne - UCL Namur

Brief Summary:

The aims of this study is :

  • to assess the bronchodilator (DUOVENT HFA) response of parameters measured by the forced oscillations (FOT) and in particular the reactance parameters related to the presence of a limitation of expiratory flows
  • to compare the response of the reactance parameters to bronchodilators with the conventional spirometric parameters (FEV1) and inspiratory capacity (IC), and according to the severity of the disease
  • to assess and compare the relationship between the response to bronchodilators in terms of IC on the one hand and on the other hand in terms of FEV1, reactance parameters (measured by FOT), resistance parameters (measured by plethysmography and FOT)
  • Assess and compare the relationship between dyspnea intensity assessed by various scales and conventional respiratory function parameters (spirometry, plethysmography, diffusion indices) and parameters measured by FOT

Condition or disease Intervention/treatment Phase
Chronic Obstructive Pulmonary Disease Drug: Duovent HFA Phase 4

Detailed Description:

Different techniques will be used during this study :

First, the FOT. The measurements will be performed using a Tremoflo-type (Thorasys Thoracic Medical System Inc.) device that generates an oscillating pressure waveform and measures impedance of the respiratory system and its components (resistance and reactance) as a function of frequency, as well as the respiratory system resonant frequency. Measurements will be performed during tidal breathing, the subjects breathing through the pneumotachograph of the system, with nose occluded, the cheeks supported by the hands (of the subjects or of an operator) to reduce the influence of the compliant upper airways. Three measurements of minimum 20 seconds duration will be recorded in the sitting position.

Second, the spirometry. The measurements will be carried out using a Medisoft Exp'air type of equipment. The parameters will be successively measured in the sitting position :

  • The inspiratory capacity (IC) will be measured by maximal inspiratory maneuver starting from the functional residual capacity
  • The thoracic gas volume (TGV), total lung capacity (TLC), as well as the airway resistance will be measured by plethysmography
  • The diffusion indices (CO transfer factor (DL,CO) and CO transfer coefficient (KCO)) will be measured in apnea
  • A spirometry will then be carried out. Three maneuvers with acceptability and reproducibility criteria will be performed

All these measurements will be carried out before the administration of the bronchodilator and 30 minutes after the administration of the bronchodilator (4 puffs of DUOVENT HFA, using an inhalation chamber).

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 80 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Assessment of Reactance Parameters Measured by the Forced Oscillation Technique for the Bronchodilator Response in Subjects With Chronic Obstructive Pulmonary Disease (COPD)
Estimated Study Start Date : April 23, 2019
Estimated Primary Completion Date : December 31, 2021
Estimated Study Completion Date : December 31, 2021

Resource links provided by the National Library of Medicine

MedlinePlus related topics: COPD Lung Diseases

Intervention Details:
  • Drug: Duovent HFA

Primary Outcome Measures :
  1. Acute inspiratory capacity increase [ Time Frame: 30 minutes ]

Information from the National Library of Medicine

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Ages Eligible for Study:   40 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Clinical diagnosis of COPD confirmed by post-bronchodilator (DUOVENT HFA 4 puffs) obstructive airway obstruction (FEV1/Forced Vital Capacity < Percentile 5) persisting after bronchodilatation
  • Former or active smoking > 10 packs/year
  • Age > 40 years
  • Informed consent

Exclusion Criteria:

  • Inability to comply with bronchodilator weaning time :

    6 hours for short-acting bronchodilators ; 12 hours for long-acting bronchodilators ; 24 hours for very long-acting bronchodilators

  • Inability to comply with the 4 hours of smoking cessation before the measurements
  • Inability to perform respiratory function tests
  • Continuous oxygen therapy
  • Close angle glaucoma
  • History of urinary retention (only for patients not usually treated with anticholinergic bronchodilators)
  • Pregnancy
  • Acute illness contraindicating the performance of respiratory tests

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Responsible Party: Marchand Eric, Principal investigator Eric MARCHAND, Centre Hospitalier Universitaire Dinant Godinne - UCL Namur Identifier: NCT03910985     History of Changes
Other Study ID Numbers: B039201938727
First Posted: April 10, 2019    Key Record Dates
Last Update Posted: April 17, 2019
Last Verified: April 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Marchand Eric, Centre Hospitalier Universitaire Dinant Godinne - UCL Namur:
Additional relevant MeSH terms:
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Lung Diseases
Lung Diseases, Obstructive
Pulmonary Disease, Chronic Obstructive
Respiratory Tract Diseases
Bronchodilator Agents
Autonomic Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Anti-Asthmatic Agents
Respiratory System Agents