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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 131-140 of 2189 for surgery

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  1. Standard or Comprehensive Radiation Therapy in Treating Patients With Early-Stage Breast Cancer Previously Treated With Chemotherapy and Surgery

    Albert Lea, MN, Jacksonville, FL, La Crosse, WI, Mankato, MN, Rochester, MN

  2. Open Vs Robotic-Assisted Radical Cystectomy: A Randomized Trial

    Scottsdale/Phoenix, AZ, Rochester, MN

  3. A Study of Computer Simulation of Endovascular Repair of Cerebral Aneurysms Aneurysms

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

  4. Reverse Total Shoulder Arthroplasty versus Nonoperative Treatment of 3 & 4-Part Proximal Humerus Fractures

    Rochester, MN

  5. A Study to Evaluate NextScience® Xperience™ versus Normal Saline Irrigation Solution for Decreasing Bioburden After Primary Total Hip and Knee Arthroplasty

    Jacksonville, FL

  6. Robotic vs. Open NSM for Early Stage Breast Cancer

    Jacksonville, FL, Rochester, MN

  7. Vaccine Therapy With Bevacizumab Versus Bevacizumab Alone in Treating Patients With Recurrent Glioblastoma Multiforme That Can Be Removed by Surgery

    Rochester, MN

  8. Ultrasonic Energy for Pulmonary Artery Branch Sealing During VATS Lobectomy

  9. Pericardial Resection to Treat Heart Failure

    Rochester, MN

  10. A Study of Minimally Invasive Pericardiotomy as a New Treatment for Heart Failure

    Rochester, MN

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