1Datex-Ohmeda Division, Instrumentarium Corp., Helsinki, Finland
2Department of Anesthesia, Eye and Ear Hospital, Helsinki University Hospital, Helsinki, Finland
3Department of Anesthesia, Surgical Hospital, Helsinki University Hospital, Helsinki, Finland
4Department of Anesthesia, Tampere University Hospital, and University of Tampere, Medical School, Tampere, Finland
5Instrumentarium Corp., Helsinki, Finland
Address: Hanna Viertiö-Oja Datex-Ohmeda Division, Instrumentarium Corp., PO BOX 900, FIN-00031 Datex-Ohmeda, Finland. e-mail: [email protected]
Work performed for Datex-Ohmeda Division, Instrumentarium Corp., Helsinki, Finland, and presented in part at the 27th Congress of the Scandinavian Society of Anesthesiology, and Intensive Care Medicine, Helsinki, Finland, August 16–20, 2003.