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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.

Study phase

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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 451-460 of 2195 for surgery

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  1. Wearables for Assessing Nontechnical and Technical Skills

  2. Stereotactic Body Radiotherapy (SBRT) Versus Sublobar Resection for High-Risk Patients with Early Stage Non-Small Lung Cancer (NSCLC)

    Rochester, MN

  3. Treatment of Thrombocytopenia in Patients With Chronic Liver Disease Undergoing an Elective Procedure

    Rochester, MN

  4. Ultrasound Utility in Carpal Tunnel Syndrome

    Scottsdale/Phoenix, AZ

  5. Efficacy of Riluzole in Surgical Treatment for Cervical Spondylotic Myelopathy (CSM-Protect)

    Rochester, MN

  6. A Study of the Relationship between Recruitment Maneuvers and Blood Volume Status in Critically Ill Patients

    Rochester, MN

  7. Prehospital Tranexamic Acid Use for Traumatic Brain Injury

  8. Utilization and Storage of Liposuction Aspirate in Humans

    Jacksonville, FL

  9. Studies using Doubly Labeled Water in Measuring Total Energy Expenditure

    Rochester, MN

  10. A Study to Evaluate Cardiac Output and Recovery Time

    Jacksonville, FL

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