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ClinicalTrials.gov public records Last synced Sep 26, 2026, 7:55 AM EDT

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Showing 1–3 of 3 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Completed Phase 4 Interventional Results available

Safety and Efficacy of CO2 for Endoscopy

NCT03287687
Conditions
Endoscopy, Insufflation
Interventions
Carbon dioxide (CO2) gas insufflation, Air insufflation
Drug
Lead sponsor
Warren Bishop
Other
Eligibility
6 Months to 21 Years
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Iowa City, Iowa
Completed Not applicable Interventional Accepts healthy volunteers

Constipation Fiber Trial

NCT02193997
Conditions
Functional Constipation in Children
Interventions
Fiber, Placebo
Other
Lead sponsor
Warren Bishop
Other
Eligibility
2 Years to 16 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Iowa City, Iowa
Completed Not applicable Interventional Accepts healthy volunteers

Fiber Health Benefits

NCT02177864
Conditions
Healthy
Interventions
Fiber, Placebo (low fiber bar)
Dietary Supplement · Other
Lead sponsor
Warren Bishop
Other
Eligibility
5 Years to 12 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Iowa City, Iowa