Developed by the Task Force on Sedation and Analgesia by Non-Anesthesiologists: Jeffrey B. Gross, M.D. (Chair), Farmington, Connecticut; Peter L. Bailey, M.D., Salt Lake City, Utah; Robert A. Caplan, M.D., Seattle, Washington; Richard T. Connis, Ph.D. (Methodologist), Woodinville, Washington; Charles J. Cote, M.D., Chicago, Illinois; Fred G. Davis, M.D., Burlington, Massachusetts; Burton S. Epstein, M.D., Washington, D.C.; Patricia A. Kapur, M.D., Los Angeles, California; John M. Zerwas, M.D., Houston, Texas; and Gregory Zuccaro, Jr., M.D., Cleveland, Ohio.Accepted for publication November 28, 1995. Supported by the American Society of Anesthesiologists, under the direction of James F. Arens, M.D., Chairman of the Committee on Practice Parameters. Approved by the House of Delegates, October 25, 1995. These guidelines received official endorsement by the Governing Board of the American Society for Gastrointestinal Endoscopy. A list of the references used to develop these guidelines is available by writing to the American Society of Anesthesiologists.Address correspondence to Dr. Gross: Department of Anesthesiology (M/C 2015), University of Connecticut School of Medicine, Farmington, Connecticut 06030-2015.Address reprint requests to the American Society of Anesthesiologists: 520 North Northwest Highway, Park Ridge, Illinois 60068-2573.