抄録
Artificial respirators are widely used for patients with little or no autonomous breathing ability. Doctors are required to pay scrupulous attention for the use of the artificial respirators. And doctors must set the artificial respirator in consideration of each patient's pulmonary characteristic. However, we do not understand the pulmonary characteristic of the patient by the measurement of data. Therefore, the setting of the artificial respirator is decided by the experience and the intuition of the doctor now. Purpose of this study are to develop a method to estimate the static P － V curve and the pulmonary elastance of the patient and to set a ventilation condition of the artificial respirator. The static P － V curve and the pulmonary elastance expresses the important feature of the lung, and the static P － V curve is a basis for deciding the air-way pressure limit value. In our previous work, we have presented an estimation technique of the pulmonary elastance by fuzzy logic. Parameters of the pulmonary elastance (fE(V)) are different in each fuzzy rules. Then, it is said that other parameters do not change in a short time(one cycle breath). Nevertheless, in the previous study, these parameters were estimated to be different values in parameters estimation of each fuzzy rule. It is considered that the estimated precision of the static P － V curve is influenced by these values. We solve this problem using new estimation procedure. In addition, a ventilation condition of the artificial respirator is set using estimated static P － V curve.
