In April of 1991, 425 partICIpants from 18 countries met in Hamamatsu in Japan for the 6th International Symposium on Computing in Anesthesia and Intensive Care (lSCAIC). The meeting was one of the most spectacular academic and fruitful in the history of ISCAIC. We had four days of fascinating presentations and discussions covering many areas of technology in Anesthesia and intensive care. New technologies were presented and old technology reexamined. The measures of success of the meeting were the excellent research material in oral and poster presentations, and state of the art reviews of the latest issues by distinguished worldwide key speakers. It must be sure that the meeting was most effective to promote and disseminate up-to-date information in these fields across the participating countries. The aim of this book is to record the exciting achievements of the meeting and extend them further among our colleagues. We hope the readers of this book will share the same excitation as well as the latest information in this speciality. Finally we would like to extend our deepest gratitude to all participants and others for the contribution to the compilation of this book. Kazuyuki Ikeda, M.D.