著者

藤本 哲男

出版者

日本運動生理学会

雑誌

日本運動生理学雑誌 (ISSN:13403036)

巻号頁・発行日

vol.4, no.2, pp.161-166, 1997-08-30

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The purpose of this experiment was to test whether a mechanical circulatory simulator (MCS), which has been developed in order to evaluate characteristics of artificial organs, could be used to simulate exercise stress tests. The MCS consists of an atrium, an aorta and a ventricle which is driven by a DC motor. It is important to reproduce natural hemodynamic conditions in the MCS. At first, a computational simulation model, which can simulate natural circulatory reactions to exercise stress tests, was developed. Utilizing an algorithm in the model, a blood pressure control system was installed in the MCS. A personal computer used aortic pressure feedback to calculate proper cardiac output, heart rate and total peripheral resistance to control the MCS. Hemodynamic data including aortic pressure, heart rate, cardiac output and total peripheral resistance obtained in the MCS was similar to that from exercise stress tests conducted on a goat using a treadmill (3.2km/h). As a result, the new MCS, with the blood pressure control system, is now considered more effective than previous simulators in exercise stress testing for the aged.