- Conditions
- Emphysema
- Interventions
- Sildenafil 20 MG, Placebo Oral Tablet, Pulse wave velocity, Carotid artery compliance and stiffness, Pressure wave reflection
- Drug · Diagnostic Test
- Lead sponsor
- Eric A. Hoffman
- Other
- Eligibility
- 21 Years to 65 Years
- Enrollment
- 162 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2018 – 2024
- U.S. locations
- 1
- States / cities
- Iowa City, Iowa
Search Results
Search by objective public record fields.
Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results come from ClinicalTrials.gov. When the live registry is unavailable, a clearly labeled stored copy may be shown.
These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Showing 1–5
of 5
matching trials from the live ClinicalTrials.gov search.
- Conditions
- Pulmonary Disease, Chronic Obstructive
- Interventions
- Pulmonary Function Test, CT Scans, Questionnaires, MRI, Xenon gas
- Diagnostic Test · Behavioral · Biological
- Lead sponsor
- Eric A. Hoffman
- Other
- Eligibility
- 20 Years to 89 Years
- Enrollment
- 341 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 1997 – 2015
- U.S. locations
- 1
- States / cities
- Iowa City, Iowa
- Conditions
- Radiation Exposure
- Interventions
- Prone hyperpolarized 3 helium gas scan, Supine hyperpolarized 3 helium gas scan, Vitals, Pulmonary Function Tests, Initial protocol MRI scan
- Drug · Diagnostic Test
- Lead sponsor
- Eric A. Hoffman
- Other
- Eligibility
- 18 Years to 90 Years
- Enrollment
- 18 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2008 – 2012
- U.S. locations
- 1
- States / cities
- Iowa City, Iowa
- Conditions
- Emphysema
- Interventions
- Sildenafil study group
- Drug
- Lead sponsor
- Eric A. Hoffman
- Other
- Eligibility
- 30 Years to 60 Years
- Enrollment
- 22 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2011 – 2014
- U.S. locations
- 1
- States / cities
- Iowa City, Iowa
- Conditions
- Emphysema
- Interventions
- Sildenafil
- Drug
- Lead sponsor
- Eric A. Hoffman
- Other
- Eligibility
- 25 Years to 65 Years
- Enrollment
- 17 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2017 – 2025
- U.S. locations
- 1
- States / cities
- Iowa City, Iowa