気泡型人工肺の内部流動に伴う発生ノイズ

概要

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An artificial lung used as a supplementary means during open heart surgery is one of the artificial organs. At the present time, the artificial lung of bubble oxygenator and membrance oxygenator are in clinical use. Both type of the oxygenators have merits and demerits, respectivelly. For the bubble oxygenator, the destruction and degeneration of the components in blood come particullarly into question. In this work, noise spectra generated in the internal flow of the bubble oxygenator is measured. The noise generated at high flow volume of O_2 attains high sound pressure level, which would be the cause of hemolysis. The bubbles generated in the mixing chamber of this artificial lung are observed by a strobo photographing, then the bubbles are 0.5 to 4 mm in diameter. By comparison between the natural frequency of the bubbles and the frequency of noise spectra, it seems that the noise generated in the bubble oxygenator is caused by the natural motion of bubbles.
一般社団法人日本機械学会の論文
1990-11-25