Affiliation: | D.L. Greenhalgh, MB, ChB, FRCA, Consultant, Departments of Anaesthesia, Wythenshawe Hospital, Manchester M23 9LT.;D. Barman, MB, ChB, FRCA, Senior Registrar, Departments of Anaesthesia, Wythenshawe Hospital, Manchester M23 9LT.;T.L. Hooper. MD, FRCS, Consultant, Departments of Cardiothoracic Surgery, Wythenshawe Hospital, Manchester M23 9LT. |