Proceedings of the
International Conference on Mechanical Engineering 2009
(ICME2009) 26- 28 December 2009, Dhaka, Bangladesh

ICME09-FM-21

REDISTRIBUTED GAS EXCHANGE MECHANISM IN HUMAN
LUNG’S PERIPHERALS

M. U. Ahmmed, H. Hirahara and T. Yamamoto
Graduate School of Science and Engineering,
Saitama University, Shimo-Okubo, Sakura, Saitama,338-8570, Japan

ABSTRACT

The velocity distribution was investigated with particle image velocimetry (PIV) in a real size model of human’s lung peripherals. The working gas is air and the oil mist was used as a tracer. The unsteady velocity profile was obtained with phase locked image capturing, and the data was processed in statistically. The target region of this study is between the 18th to 20th bifurcations in lung’s airway. The fundamental respiratory flow was investigated in the present experiment under the high frequency oscillatory ventilation (HFOV) mode for the different compliance conditions, which is important for the clinical treatment. According to the mean flow analysis, the phase delay was estimated theoretically and obtained experimentally. The phase delay in the mean flow was very small, however the obvious flow mixing was observed in the air path lines.

Keywords: Human lung, PIV, Compliance, HFOV, Redistribution of Gas.

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