A patient monitoring system for cardiopulmonary bypass surgery has been developed. This monitoring system uses a SWAN 286-10 computer (fully IBM PC/AT compatible) and a DT280l-A Input/Output board to monitor seven surgical parameters. This system monitors six temperatures, the hemoglobin content, the arterial oxygen saturation, the venous oxygen saturation, the oxygen consumption, and the blood flow rate through the cardiopulmonary bypass circuit. Additionally, there are three individual timers available. Details and the evaluation of the hardware and software design of this monitoring system are presented. Also, recommendations for clinical use are discussed. / Master of Science / incomplete_metadata