Nano Archive

Pulsation sensor integrated with microvascular holding actuator for thrombosis monitoring

Mineta, Takashi and Kida, Nozomi and Nomura, Satoshi and Makino, Eiji and Sugawara, Takashi and Toh, Satoshi and Shibata, Takayuki (2008) Pulsation sensor integrated with microvascular holding actuator for thrombosis monitoring. Sensors and Actuators A: Physical, 143 (1). 14 - 19.

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Official URL: http://www.sciencedirect.com/science/article/B6THG...

Abstract

In this paper, we describe a micro-pulsation sensor, which is integrated with a TiNiCu ternary shape memory alloy (SMA) thin film actuator arm for microvascular holding. The actuator arm has micro-heaters to heat up the SMA film locally for actuations of holding and releasing a fine blood vessel. Pulsation was detected successfully by a mechanical deflection of an SMA cantilever, on which strain gauges of Pt thin film lines were formed. Obtained sensitivities of the displacement measurement of the cantilever were about 0.1 mV/μm and 0.08 mV/μm for static and dynamic deflections, respectively. In vivo measurement of a femoral artery pulsation of a laboratory rat was conducted. The sensor could detect a normal pulsation waveform with amplitude of about 3.5 mV. The sensor could also successfully detect a decrease of amplitude of pulsation waveform caused by a bloodstream obstruction.

Item Type:Article
Additional Information:Micromechanics Section of Sensors and Actuators (SAMM), based on contributions revised from the Technical Digest of the IEEE 20th International Conference on Micro Electro Mechanical Systems (MEMS 2007) - MEMS 2007, IEEE 20th International Conference on Micro Electro Mechanical Systems
Uncontrolled Keywords:Shape memory alloy; Actuator; Pulsation sensor; Blood vessel; Thrombosis
Subjects:Analytical Science > Nanotechnology for sensing and actuating
Biomedical Science > Nanotechnology for human health
Material Science > Nanostructured materials
Biomedical Science > Nanomedicine
ID Code:4915
Deposited By:SPI
Deposited On:09 Apr 2009 16:28
Last Modified:09 Apr 2009 16:28

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