ClinicalTrials.gg
Not yet recruitingNCT05381415BREATH COPDUpdated May 4, 2026

Effect on Bronchodilation Response and Ventilation Heterogeneity of Different Inhalation Volumes in COPD

An observational study in COPD and Lung Injury, sponsored by University of Milan. Not yet recruiting at 1 site in Italy. Open to participants aged 40 Years and older. Per ClinicalTrials.gov, last updated 2026-05-04.

Sponsored by University of Milan · Observational

Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
30
Ages
40 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 15 studies in Pulmonary Disease, Chronic Obstructive by University of Milan — 4 open to participants now, 4 under way, none of them phase 3. Pulmonary Disease, Chronic Obstructive · University of Milan.

Started
2026
with 1 other
Observational
4 of 15
3 open now
Registered
12th of 15
by date

Among the 15 studies in Pulmonary Disease, Chronic Obstructive by University of Milan, this one is one of 2 that started in 2026, is one of 4 observational ones, and was the 12th registered.

Pulmonary Disease, Chronic Obstructive

5,521 studies on the registry are indexed under Pulmonary Disease, Chronic Obstructive; 857 are open to participants now.

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Open to participants now

4 of the 15 studies in Pulmonary Disease, Chronic Obstructive by University of Milan are open now, in 1 country. Recruiting first, the newest first:

By country, each count listing its studies:

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Where they have run

Who these studies take

Of the 557 Pulmonary Disease, Chronic Obstructive studies recruiting now, 306 (55%) set no upper age limit and 82 (15%) stop at 75 or younger; 29 take children under 18; 88 take healthy volunteers.

This study: 40 Years and older · all sexes · no healthy volunteers.

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02

Study summary

During bronchodilator tests, it's common to ask patients with asthma or chronic obstructive pulmonary disease (COPD) to take bronchodilator therapy by inhaling after a maximal exhalation, when the respiratory system volume equals the residual volume. The same maneuver is required for the chronic therapy.

Nevertheless, in patients with COPD the distribution of ventilation is more heterogeneous, especially when lung volumes are closer to residual volume . It is therefore predictable that the distribution of air volume containing bronchodilator that has been inhaled at residual volume is more heterogeneous than at higher volumes, such as at functional residual capacity. Accordingly, the bronchodilator can be preferentially distributed in more open airways than in less patent ones, with a heterogeneous distribution of the medication. Therefore, the overall bronchodilation should be greater when the drug inhalation is performed at functional residual capacity than at residual volume.

It is common knowledge that the effectiveness of bronchodilator therapy with pMDI in subjects with COPD is greatly affected by the inhalation technique, which can be difficult to perform for many patients. Therefore, in addition to the possibility that inhalation of bronchilation therapy at residual volume could lower the drug effectiveness, this maneuver complicates the sequence of actions required to the patient, enhancing the risk of errors and decreasing the aderence to treatment.

The aim of this study is to investigate whether the inhalation of a bronchodilator at different lung volumes can affect its effectiveness in terms of respiratory function, in patients with COPD.

Assuming that the bronchodilator effectiveness is equal or greater when inhaled at functional residual capacity rather than at residual volume, the inhalation maneuver can be simplified for patients with COPD.

03

Conditions studied

04

Who can participate

Ages eligible
40 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Patients with COPD diagnosis (VEMS/FVC after bronchodilatation \<0.7) will be enrolled in a stable state of disease, diagnosed from at least 12 months [GOLD].

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • age above 40 years old;
  • history of smoking equal or above 10 PKYs;
  • VEMS after bronchodilatation ≤ 70%,
  • medical Necessity to perform a bronchodilatation test.

Exclusion criteria

Exclusion Criteria:

  • history of bronchial asthma or other chronic respiratory diseases such as pulmonary fibrosis;
  • uncontrolled cardiovascular diseases at the time of the visit;
  • current pregnancy;
  • incapacity to execute lung function tests for cognitive impairment, substance abuse or claustrophobia;
  • known or intolerance to salbutamol.
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
30 participants (estimated)
Patient registry
No

Groups and cohorts

  • Patients with COPD

    Patients with COPD diagnosis (VEMS/FVC after bronchodilatation \<0.7) will be enrolled in a stable state of disease, diagnosed from at least 12 months \[GOLD\]. Each patient will be studied during three visits. In the first visit it will be established the patient eligibility. Furthermore, the patient will be able to familiarize with the experimental procedure. Chronic inhalation therapy will be suspended 24 (long action) and 8 (short action) hours before the second and third visit. If a patient is on tiotropium bromide, it will be required to be suspended 7 days before the visit. During the second and third visit, which will be scheduled 30 days one from another, the patient will be asked to inhale the bronchodilator (salbutamol pMDI, 400 µg) with a spacer from VR or FRC, in a random order. Before and after the administration it will be asked to the patient to execute a spirometry, a plethysmography, a lung diffusion test, and the NEP technique.

    Other: Inhalation of bronchodilation therapy at FRC · Other: Inhalation of bronchodilation therapy at RV

Interventions

  • OtherInhalation of bronchodilation therapy at FRC

    the patient will be asked to inhale the bronchodilator (salbutamol pMDI, 400 µg) with a spacer from FRC (functional residual capacity, in a random order, with the assistance of an operator. The spacer will be connected to a Fleish flowmeter placed in series with the pMDI device. The valve included in the spacer will guarantee that only the air inhaled by the patient will pass through the flowmeter, reducing the risk of contamination. In both cases a low inspiratory flux and a period of apnea after inhalation of 10 seconds will be used. Before and after the administration it will be asked to the patient to execute a spirometry, a plethysmography, a lung diffusion test, and the NEP technique. These will allow the characterization of the bronchodilator effect in terms of static and dynamic volumes, heterogeneity of ventilation distribution and volume of closure, expiration flux-limitation.

  • OtherInhalation of bronchodilation therapy at RV

    the patient will be asked to inhale the bronchodilator (salbutamol pMDI, 400 µg) with a spacer from VR , with the assistance of an operator. The spacer will be connected to a Fleish flowmeter placed in series with the pMDI device. The valve included in the spacer will guarantee that only the air inhaled by the patient will pass through the flowmeter, reducing the risk of contamination. In both cases a low inspiratory flux and a period of apnea after inhalation of 10 seconds will be used. Before and after the administration it will be asked to the patient to execute a spirometry, a plethysmography, a lung diffusion test, and the NEP technique. These will allow the characterization of the bronchodilator effect in terms of static and dynamic volumes, heterogeneity of ventilation distribution and volume of closure, expiration flux-limitation.

06

What researchers measure

Primary outcomes

  1. Efficacy of bronchodilation therapy inhaled at Functional Residual Capacity (FRC) on Forced Expiratory Volume in 1 second (FEV1)

    Assuming that the bronchodilator effectiveness is equal or greater when inhaled at functional residual capacity rather than at residual volume, the inhalation maneuver can be simplified for patients with COPD.

    Time frame: 1 year

Secondary outcomes

  1. Effects on change in phase III slope of the closing volume curve

    Efficacy of bronchodilation therapy inhaled at FRC on reducing phase III slope of the closing volume, as compared to bronchodilation therapy inhaled at RV

    Time frame: 1 year

  2. Effects on forced vital capacity (FVC)

    Efficacy of bronchodilation therapy inhaled at FRC on static and dynamic lung volumes as compared to bronchodilation therapy inhaled at RV

    Time frame: 1 year

  3. Effects on vital capacity (VC)

    Efficacy of bronchodilation therapy inhaled at FRC on static and dynamic lung volumes as compared to bronchodilation therapy inhaled at RV

    Time frame: 1 year

  4. Effects on residual volume (RV)

    Efficacy of bronchodilation therapy inhaled at FRC on static and dynamic lung volumes as compared to bronchodilation therapy inhaled at RV

    Time frame: 1 year

  5. Effects on total lung capacity (TLC)

    Efficacy of bronchodilation therapy inhaled at FRC on static and dynamic lung volumes as compared to bronchodilation therapy inhaled at RV

    Time frame: 1 year

  6. Effects on sensation of dyspnea as measured by modified Medical Research Council (mMRC) score

    Efficacy of bronchodilation therapy at functional residual capacity on sensation of dyspnea

    Time frame: 1 year

  7. Effects on specific airway resistance (sRAW)

    Efficacy of bronchodilation therapy at functional residual capacity on specific pulmonary resistances

    Time frame: 1 year

07

Study locations

1 site
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Start is estimated for Dec 2026; primary completion for Dec 2027, 12 months later.

Of 466 non-industry observational studies under Pulmonary Disease, Chronic Obstructive, half reached primary completion within 29 months of starting (the median), counting those still running; a quarter within 15 and three quarters within 64. This study's planned 12 months is below that.

Counting every sponsor, half of 586 studies reached it within 26 months; a quarter within 14 and three quarters within 58.

How these figures are worked out, and which studies are left out of them.

Registered
May 4, 2022
First posted
May 19, 2022
StartEst.
Dec 1, 2026
Primary completionEst.
Dec 1, 2027
CompletionEst.
Dec 30, 2027
Last update
May 4, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on May 4, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05381415
Collaborators
Department of Clinical and Surgical Pathophysiology and Transplantation, University of Milan
Responsible party
Pierachille Santus, MD, PhD (Professor of Pulmonary Medicine, University of Milan) — Principal investigator
First posted
May 19, 2022
Start date
Dec 1, 2026 (estimated)
Primary completion
Dec 1, 2027 (estimated)
Completion
Dec 30, 2027 (estimated)
Last update
May 4, 2026

Study contacts

Pierachille Santus, PhD,MD,Prof
Contact
pierachille.santus@unimi.it
0239042801

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is not yet recruiting, as verified in Apr 2026. You cannot join it, but the record below documents what was studied.

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