Each year a highlight of the Annual Meeting of the American Association for Respiratory Care, the RESPIRATORY CARE Open Forum, provides a platform for the reporting and discussion of some of the clinical studies, method and device evaluations, and case reports completed by members and friends during the previous year. During the 1990 Open Forum in New Orleans, Louisiana, December 8-11, more than 90 papers will be pre-sented-clustered into groups of similar topics or into minisymposia. The abstracts of those papers are published here, sequenced as they will be presented. An index of the authors appears on Page 1147, with Presenters designated by boldface type.