- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02483403
Longitudinal 3He Magnetic Resonance Imaging of Healthy Lung
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Briefly, during a single four hour visit, subjects will perform: 1) physical exam, 2) full pulmonary function tests, 3) cycle ergometry, 4) dyspnea and exertions scores using Borg scales, 5) BOLD Questionnaire and 6) 3He MRI before and after bronchodilation by deep inspiration, and potentially 25 minutes after inhalation of 2 puffs (200 µg) of the short-acting bronchodilator salbutamol in subjects who do not respond with 3He MRI ventilation improvements to deep inhalation. Hand-held spirometry will be performed post deep inspiration, and post salbutamol in those who receive salbutamol.
Subjects will first provide written informed consent and then be screened for MRI compatibility and will complete dyspnea and exertion scales, and full pulmonary function tests. A physical exam including vital signs and medical and smoking history will be performed. Subjects will complete the Bold Occupational Questionnaire and rest for approximately 15 minutes before cycle ergometry, including pre-and-post Borg scale evaluations. After completion of cycle ergometry, subjects will rest upright for 15 minutes and prepare for MRI which will be performed on 3 occasions within 1 hour: 1) before deep inspiration, 2) 3 minutes later after deep inspiration and, 3) 25 minutes later after inhalation of 2 puffs of salbutamol in subjects who do not respond to deep inhalation. Images obtained post deep inhalation will be assessed on the spot to determine if administration of salbutamol is required to resolve ventilation defects. Hand-held spirometry will also be performed post deep inspiration and post salbutamol in those who receive salbutamol.
Study Type
Enrollment (Anticipated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Angela P Wilson, RRT
- Phone Number: 24197 519-931-5777
- Email: awilson@robarts.ca
Study Contact Backup
- Name: Grace E Parraga, PhD
- Phone Number: 519-931-5265
- Email: gparraga@robarts.ca
Study Locations
-
-
Ontario
-
London, Ontario, Canada, N6A 5B7
- Recruiting
- Robarts Research Institute; The University of Western Ontario; London Health Sciences Centre
-
Contact:
- Grace E Parraga, PhD
- Phone Number: 519-931-5265
- Email: gparraga@robarts.ca
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Subjects male and female aged 60-90
- Subject has a smoking history of < 0.5 pack years
- Subject understands the study procedures and is willing to participate in the study as indicated by signature on the informed consent
- Subject must be able to perform a breathhold for 16s.
- BMI 18-30
- Subject is judged to be in stable health on the basis of medical history
- Subject able to perform reproducible pulmonary function testing (i.e., the 3 best acceptable spirograms have FEV1 values that do not vary more than 5% of the largest value or more than 100 ml, whichever is greater.)
Exclusion Criteria:
- Subject is, in the opinion of the investigator, mentally or legally incapacitated, preventing informed consent from being obtained, or cannot read or understand the written material.
- Subject has a history of cardiovascular disorders including coronary insufficiency, cardiac arrhythmias, severe hypertension (≥160 over ≥100)
- Subject has a daytime room air oxygen saturation <90% while lying supine.
- Subject is unable to perform spirometry or plethysmography maneuvers
- Subject is unable or unwilling to ride a stationary bicycle
- Subject is pregnant
- In the investigator's opinion, subject suffers from any physical, psychological or other condition(s) that might prevent performance of the MRI, such as severe claustrophobia.
- Subject has an implanted mechanically, electrically or magnetically activated device or any metal in their body which cannot be removed, including but not limited to pacemakers, neurostimulators, biostimulators, implanted insulin pumps, aneurysm clips, bioprosthesis, artificial limb,
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Other: Healthy Volunteers
Healthy elderly volunteers will undergo pulmonary function tests, hyperpolarized Helium-3 MRI at each visit.
|
Hyperpolarized noble gas imaging using Helium-3 has been used to explore structural and functional relationships in the lung in patients with lung disease and healthy controls.
In contrast to proton-based MRI imaging, Helium-3 gas is used as a contrast agent to directly visualize the airways, and thus ventilation.
Whereas the normal density of gas is too low to produce an easily detectable signal, this is overcome by artificially increasing the amount of polarization per unit volume using optical pumping.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Ventilation Defect Percent (VDP)
Time Frame: 3 years
|
Whole lung and segmental 3He MRI ventilation defect percent (VDP) are calculated by normalizing the volumes of 3He ventilation defects to the spatially matched CT whole lung and lung segments
|
3 years
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Apparent Diffusion Coefficients (ADC)
Time Frame: 3 years
|
Diffusion weighted noble gas MRI provides a way to quantify pulmonary microstructure by sensing the movements of inhaled gas atoms.
The "apparent" diffusion coefficient (ADC) during the diffusion time interval can be used to reflect the extent of alveolar restriction of gas atom movements, providing a surrogate measurement of airspace dimensions.
|
3 years
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Grace E Parraga, PhD, Robarts Research Institute, The University of Western Ontario
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Other Study ID Numbers
- ROB0003
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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