부산대학교 도서관

During cardiac surgery, an extracorporeal circulation system is used. This implies that the lungs are disconnected from the body during the procedure. In order to reduce potential tissue damage, a mild hypothermia is applied to the lungs. An improved comprehension of lung heat transfer dynamics may enhance the control of such hypothermia.A thermal model based upon the thermal two-port network allows to have a broad frequency domain validity, which allow to have a valid model over the human breathing frequency range. This formalism can be adapted in order to also include the effect of blood flow, which is a natural thermal regulator for the human body. This is achieved through the combination of the thermal two-port network and the bio-heat equation.Besides the physical modeling, system identification may also be important. If one wants to track model parameter fluctuations during a procedure, a real-time system identification method is desired. Therefore, recursive methods will be developed.