14 December 2006 Development of blood extraction pump by shape memory alloy actuator for bio-MEMS
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In actuator capabilities of a blood extraction, a quick response, a high output power and a highly precise deflection of the smart material actuator for the blood extraction micro pump are prerequisite for a precise control of the amount of blood extraction. In Bio-MEMS fields, the development of a micro pump driven by an electromagnetic power, a piezoelectric element, electrostatic power and a shape memory alloy (SMA) such as a smart material type and a vacuum type, are investigated. However, the piezoelectric micro pump has a slow extraction speed. On the other hand, a vacuum type micro pump can extract blood very fast, however, it cannot deliver a drug as a drug delivery system(DDS.). In this research, we focus on the development of SMA type micro pump to extract blood by negative pressure generated in extraction chamber using SMA. Because, SMA shows high work output per unit volume, high power to mass ratio and the capability of being driven without high applied electric fields. In this research, the most significant factors in the factors of a needle length, an inner and an outer diameter, numbers of cuts for the SMA disk are optimized by using the experimental design method, which can estimate priority factors from a comparatively small number of experiments are investigated. In the design of factors for the SMA type micro pump, a reduction of the inner and outer diameter of the needle, the blood extraction volume and extraction time are effective factors in order to mitigate a burden of diabetic patients. The effect of the length of the needle, and especially the inner diameter of the needle showed 50% of contributing rate contribution for blood extraction volume.
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Kazuyoshi Tsuchiya, Kazuyoshi Tsuchiya, Yuuki Shimazu, Yuuki Shimazu, Yasutomo Uetsuji, Yasutomo Uetsuji, Eiji Nakamachi, Eiji Nakamachi, "Development of blood extraction pump by shape memory alloy actuator for bio-MEMS", Proc. SPIE 6416, Biomedical Applications of Micro- and Nanoengineering III, 64160A (14 December 2006); doi: 10.1117/12.695194; https://doi.org/10.1117/12.695194

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