Understanding clinical trials | St. Joseph's Heart & Vascular Institute | Dignity Health | Dignity Health Understanding Clinical Trials A clinical study involves research using human participants that is intended to add to medical knowledge. The results of these studies can make a difference in the care of future patients by providing information about the benefits and risks of therapeutic, preventative, or diagnostic products or interventions. To help potential volunteers better understand what it means to participate in a clinical trial, we’ve provided links to additional information below. Phases of a Clinical Trial Questions for Your Doctor Informed Consent Research Subject Bill of Rights FAQ Resources Glossary of Terms Understanding Clinical Trials Clinical Trial Resources Clinical Trials FAQ Informed Consent Phases of a Clinical Trial Questions for your Doctor Research Subject's Bill of Rights