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Vol. 139, No. 4, April 2012, pp. 63-78

 

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Simulation and Design Optimization of Piezoelectricaly Actuated Valveless Blood Pump for Hemofiltration System

 

* Shahzadi Tayyaba, Nitin Afzulpurkar, Muhammad Waseem Ashraf

School of Engineering and Technology, Asian Institute of Technology (AIT), Bangkok, Thailand

E-mail: Shahzadi.Tayyaba@ait.ac.th, Muhammad.Waseem.Ashraf@gmail.com, nitin@ait.ac.th

 

 

Received: 5 February 2012   /Accepted: 23 April 2012   /Published: 30 April 2012

 

Digital Sensors and Sensor Sysstems

 

Abstract: Kidney failure is expanding almost exponentially in the world at present. So, there is an urgent need to develop highly efficient and low cost system capable of blood filtration for the patients who need to remove the waste products from their blood to save their lives. This paper presents a novel design of MEMS based hemofiltration (HF) system. The proposed HF system consists of four modules that are electronic module, blood transport module, blood filtration module and drug delivery module. Coupled multifield analysis of MEMS based piezoelectrically actuated polymeric valveless micropump has been performed for HF system. Micropump comprises of thee serial actuators, nozzle/diffuser elements and three chambers. Effects of various parameters such as actuator thickness, frequency, voltage, nozzle/diffuser angle, power consumption on flow rate have been investigated during the multifield and theoretical analysis. The maximum deflection of 6.808 μm has been observed at applied 105 V. Maximum flow rate of 519 μL/min has been obtained at 200 Hz with applied 105 V by keeping thickness constant 0.2 mm with power consumption 45 mW.

 

Keywords: Hemofiltration system, MEMS, Piezoelectric micropump, Coupledmultifield

 

 

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