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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 221-230 of 2188 for surgery

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  1. Clinical Research Study With Clazosentan to Evaluate Its Effects on Preventing Complications Due to the Narrowing of the Blood Vessels (Vasospasm) in the Brain, Caused by Bleeding Onto the Surface of the Brain (REACT)

    Jacksonville, FL

  2. Endoscopic Gastric Reduction for Weight Management

    Rochester, MN

  3. Tranexamic Acid in Revision Total Joint Arthroplasty

    Rochester, MN

  4. Intrapatient Comparison of Urinary Radioactivity Following Piflufolastat (18F) and Flotufolastat (18F) PET in Men With Low PSA Biochemical Recurrence of Prostate Cancer Following Radical Prostatectomy

    Scottsdale/Phoenix, AZ, Jacksonville, FL

  5. A Study to Evaluate Preoperative Oral Microbiota-Based Investigational New Drug to Target Immune Response in Patients with Operable Stage I-III Breast Cancer

    Jacksonville, FL

  6. Inolitazone Dihydrochloride and Paclitaxel in Treating Patients With Advanced Anaplastic Thyroid Cancer

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

  7. Treatment In Thoracic Aortic Aneurysm: Surgery Vs Surveillance

    Rochester, MN

  8. Comparison of Different Types of Surgery in Treating Patients with Stage IA Non-Small Cell Lung Cancer

    Rochester, MN

  9. A Study to Determine How BI 907828 is Taken up in the Tumor and to Determine the Highest Dose of BI 907828 That Could be Tolerated in Combination With Radiation Therapy in People With a Brain Tumor Called Glioblastoma

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

  10. Visual Evoked Potential Reliability during Non-Cranial Surgery

    Rochester, MN

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