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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 31-40 of 101 for

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  1. A Study to Assess Neuromuscular Ultrasound to Predict the Duration of Mechanical Ventilation.

    Rochester, MN

  2. A Study to Determine Serum and Urine Reference Ranges in Patients with Normal Renal Function Being Administered Gadobutrol for an Enhanced Magnetic Resonance Imaging (MRI)

    Rochester, MN

  3. A Study to Determine the Feasibility of Doppler Ultrasound of Large Arterial Systems of the Brain as Vascular Involvement Markers in Presbyacusis and Presbyvestibulopathy

    Jacksonville, FL

  4. Evaluation of Advanced Methods for Improved Imaging in Musculoskeletal MRI

    Rochester, MN

  5. A Study Comparing the Effective Use of a Compact MRI Scanner to Other Similar Scanners

    Rochester, MN

  6. Ultrasound Evaluation of Synovitis

    Rochester, MN

  7. A Study to Evaluate the Use of Lung and intra-abdominal vessels Ultrasond for Intradialytic Complications in Hospitalized Patients on Intermittent Hemodialysis

    Rochester, MN

  8. A Study to Evaluate the Patient Experience Regarding Image-Guided Percutaneous Breast Biopsy

    Jacksonville, FL

  9. A Study of the Role Connective Tissue and Wound Healing Characteristics Play in Patients with Multiple Brain Aneurysms

    Rochester, MN

  10. A Study to Evaluate the Adaptive Image Receive (AIR) Coil System for Patients Undergoing MR Imaging Simulation

    Rochester, MN

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