Investigations of DC Electro-Osmotic (DCEO) micro pumps for an orthopaedic implant applications
by Prachya Mruetusatorn, Mohamed R. Mahfouz, Jie (Jayne) Wu
International Journal of Biomedical Engineering and Technology (IJBET), Vol. 3, No. 1/2, 2010

Abstract: This paper investigates the feasibility and design of an Electro-Osmotic pump to deliver interstitial fluids to chemical sensing devices inside orthopaedic implants for prognostic feedback. Attention is given to pump parameters, e.g., pump geometries, power consumption, and fluid properties (ionic strength, viscosity). The fabrication of micro-pumps is simple and inexpensive by soft lithography, with no need of cleanroom. The micro-pumps are interfaced with an external load for sample delivery where flow rates of 0.017-0.097 μL/min are generated under electric fields of 10−50 V/cm with less than 2.5-μW power consumption. The overall results well agree with theoretic prediction.

Online publication date: Mon, 30-Nov-2009

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