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A volunteer subject with no known significant health problems who participates in research to test a new drug, device or intervention. These volunteers are recruited to serve as controls for patient groups. Healthy volunteers receive the same test, procedure, or drug the patient group receives.

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During the early phases (phases 1 and 2), researchers assess safety, side effects, optimal dosages and risks/benefits. In the later phase (phase 3), researchers study whether the treatment works better than the current standard therapy. They also compare the safety of the new treatment with that of current treatments. Phase 3 trials include large numbers of people to make sure that the result is valid. There are also less common very early (phase 0) and later (phase 4) phases. Phase 0 trials are small trials that help researchers decide if a new agent should be tested in a phase 1 trial. Phase 4 trials look at long-term safety and effectiveness, after a new treatment has been approved and is on the market.

Search Results 1-10 of 10 for Upper endoscopy

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  1. Study to Evaluate Eradicating Barrett's Esophagus Using Radiofrequency Ablation or a Novel Hybrid Argon Plasma Coagulation Technique

    Scottsdale/Phoenix, AZ, Jacksonville, FL, Rochester, MN

  2. A Study Using the Esophageal Sponge to Gather Specimens for Management of Dietary Therapy in Eosinophilic Esophagitis

    Rochester, MN

  3. Minimal Risk Registry of Endoscopic Image and Pathology Correlation for Fujiflim

    Jacksonville, FL, Rochester, MN

  4. A Study Developing a Rapid Count for Total Bacteria in Human Intestinal Fluid

    Scottsdale/Phoenix, AZ

  5. Electronic Nose Identification of Fasting and Non-fasting Breath Profiles

    Rochester, MN

  6. Small Bowel Microbiota Characterization in Healthy Individuals Before and After Consumption of a Western Diet

    Rochester, MN

  7. A Study to Compare the Effectveness of Colon Capsule Endoscopy versus Computed Tomographic Colonography in Screening to Identify Colon Polyps

    Rochester, MN

  8. A Study to Evaluate Total Bacterial Count in Human Duodenal/Jejunal Fluid During Upper Endoscopy

    Scottsdale/Phoenix, AZ

  9. Quality of Life After Endoscopic Skull Base Surgery

    Rochester, MN

  10. A Study of Endolumenal Functional Lumen Imaging Probe (EndoFLIP) for Gastroesophageal Reflux Disease after Laparoscopic Sleeve Gastrectomy

    Rochester, MN

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