A new dimensionless index for evaluating cell stiffness-based deformability in microchannel

Chia-Hung Tsai*, Shinya Sakuma, Fumihito Arai, Makoto Kaneko


研究成果: Article同行評審

42 引文 斯高帕斯(Scopus)


This paper proposes a new index for evaluating the stiffness-based deformability of a cell using a microchannel. In conventional approaches, the transit time of a cell through a microchannel is often utilized for the evaluation of cell deformability. However, such time includes both the information of cell stiffness and viscosity. In this paper, we eliminate the effect from cell viscosity, and focus on the cell stiffness only. We find that the velocity of a cell varies when it enters a channel, and eventually reaches to equilibrium where the velocity becomes constant. The constant velocity is defined as the equilibrium velocity of the cell, and it is utilized to define the observability of stiffness-based deformability. The necessary and sufficient numbers of sensing points for evaluating stiffness-based deformability are discussed. Through the dimensional analysis on the microchannel system, three dimensionless parameters determining stiffness-based deformability are derived, and a new index is introduced based on these parameters. The experimental study is conducted on the red blood cells from a healthy subject and a diabetes patient. With the proposed index, we showed that the experimental data can be nicely arranged.

頁(從 - 到)1187-1195
期刊IEEE Transactions on Biomedical Engineering
出版狀態Published - 1 1月 2014


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