Ventilation and Perfusion in Asthmatics

April 30, 2026 updated by: Trishul Siddharthan, University of Miami

Ventilation and Perfusion in Individuals With Asthma

Assess regional changes to perfusion and ventilation from inhaled corticosteroid (ICS) and Fast-acting beta-antagonist (FABA) among adult asthmatics using radiographically derived estimates of regional ventilation (V-distribution), ventilation defect percentage (VDP), and ventilation heterogeneity (VH).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
40

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

  • United States
    • Florida
      • Miami, Florida, United States, 33136
        • Recruiting
        • University of Miami - Converge Miami
        • Principal Investigator:
          • Trishul Siddharthan, MD
        • Contact:

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Physician diagnosis of asthma
  • Baseline Forced Expiratory Volume in 1 Second (FEV1) < 80% of predicted, with reversibility (10%) on post-bronchodilator spirometry
  • Adults, 18-75 years of age
  • Long-term inhaled controller medication consisting of or including an Inhaled corticosteroids (ICS) at a steady dose for at least 3 months before enrollment

Exclusion Criteria:

  • Current cigarette smoking or a past history of >10 pack-year smoking
  • Current nicotine vaping
  • Pregnant and breast-feeding women
  • Respiratory infection within 4 weeks of proposed study date
  • Forced Expiratory Volume in 1 Second (FEV1) < 50%
  • Inhaled corticosteroids (ICS)/fast-acting beta agonist (FABA) intolerance
  • Use of beta-blockers
  • Use of systemic glucocorticosteroids or oral methyl-xanthines within 30 days of planned study visit.

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

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Albuterol Sulfate followed by AIRSUPRA (Albuterol/Budesonide)

All participants in this single-arm study will complete 2 study visits, each lasting approximately 1 hour. Interventions will be administered in a sequential order.

  • Visit 1: Participants will inhale Albuterol Sulfate via metered-dose inhaler (MDI) with spacer
  • Visit 2: Participants will inhale AIRSUPRA (Albuterol/Budesonide) via metered-dose inhaler (MDI) with spacer as the second stage of treatment.
Drug: Albuterol Sulfate
Visit 1: Albuterol Sulfate (90mcg) two puffs will be administered via metered-dose inhaler (MDI) with spacer during the baseline study visit to obtain baseline imaging values.
Other Names:
  • Ventolin Hydrofluoroalkane (HFA)
Drug: Albuterol-Budesonide
Visit 2: AIRSUPRA (Albuterol/Budesonide) (90mcg/80mcg) two puffs will be administered via MDI with spacer during this study visit. This intervention is used to evaluate its effect on ventilation defect percentage (VDP), ventilation heterogeneity (VH), and perfusion metrics derived from XV LVAS imaging
Other Names:
  • AIRSUPRA

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Change in Regional Ventilation
Time Frame: Baseline, 30 minutes after budesonide administration
Regional ventilation will be measured using functional lung imaging (XV LVAS) before and after inhalation of Albuterol/Budesonide. The outcome will be defined as the change in voxel-wise ventilation distribution from end expiration to peak inspiration, normalized to regional lung volume.
Baseline, 30 minutes after budesonide administration

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change in Regional Mean Specific Perfusion
Time Frame: Baseline, 30 minutes after budesonide administration
Mean specific perfusion (MSP) will be measured using XV-LVAS-based flow maps derived from functional lung imaging. The reported value is a unitless regional perfusion ratio, calculated as Regional MSP divided by Total MSP. The outcome represents the change in this unitless metric between baseline imaging and follow-up imaging performed within 30 minutes after inhalation of budesonide.
Baseline, 30 minutes after budesonide administration
Percent Change FEV₁/Forced Expiratory Volume (FVC) Ratio (Unitless)
Time Frame: Baseline, 30 minutes after budesonide administration
The outcome is defined as the change in the percent ratio of Forced Expiratory Volume in 1 second (FEV₁) to Forced Vital Capacity (FVC) between the pre- and post-intervention assessments. The FEV₁/FVC ratio (unitless) will be measured using standardized spirometry immediately before and 30 minutes after inhalation of budesonide-formoterol during the same study visit
Baseline, 30 minutes after budesonide administration
Percent Change in FEV₁ (Forced Expiratory Volume in 1 second)
Time Frame: Baseline, 60 minutes after budesonide administration
FEV₁ (Forced Expiratory Volume in 1 second) is the amount of air an individual can forcefully exhale in the first second of a maximal expiratory effort following a full inhalation. The FEV₁ will be measured before and after inhalation of Albuterol/Budesonide. The outcome is defined as the percent change in these values within the same visit, using standardized spirometry procedures.
Baseline, 60 minutes after budesonide administration
Percent Change in FVC (Forced Vital Capacity)
Time Frame: Baseline, 60 minutes after budesonide administration
FVC (Forced Vital Capacity) is the total volume of air that can be forcibly exhaled from the lungs after taking the deepest possible breath. The FVC, will be measured before and after inhalation of Albuterol/Budesonide. The outcome is defined as the percent change in these values within the same visit, using standardized spirometry procedures.
Baseline, 60 minutes after budesonide administration

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University of Miami

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Australian Lung Health Initiative Pty Ltd

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Trishul Siddharthan, MD, University of Miami

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 (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
April 27, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
April 1, 2028

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
April 1, 2028

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
February 3, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 20, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
February 23, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
May 5, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 30, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
April 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 20251152

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

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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