ACTUATOR 2014 Manuscript A6.3

ACTUATOR 2014 Manuscript A6.3

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Author: Hubert Borgmann
Length: 4 page(s)
Written: Apr 2015
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Views: 2139

Category: Sciences & Research » Engineering  |  Work: Article
Keywords: micropump, piezo, actuator, glaucoma, phthisis, CLPT, model, optimization

Manuscript A6.3 published in Conference Proceedings ACTUATOR 2014

Optimization of a Piezoelectric Micropump Actuator for Medical Application in Glaucoma and Phthisis
Therapy

C.W. Jenke1, S. Kibler1, Y. Gao1, A. Hollot², T. Neuhann3, B. Kirchhof4, B. Montag5, M. Geiger6,
J. Neitzel7, C. Kutter1, M. Richter1
1Fraunhofer EMFT, München, Germany
2DUALIS MedTech GmbH, Seefeld, Germany
3Augenärzte Prof. Thomas Neuhann & Kollegen, München, Germany
4Klinikum der Universität zu Köln, Köln, Germany
5Geuder AG, Heidelberg, Germany
6Binder Elektronik GmbH, Sinsheim, Germany
7jvi GmbH, Deckenpfronn, Germany

Abstract
The goal in this project was to design a micropump that enables a therapy for the eye diseases glaucoma and phthisis. By adding or removing eye liquid with an implant system, the intraocular pressure is to be manipulated to a healthy level. The main challenges of the implant are to fulfill the fluidic requirements as well as minimize the overall system size to fit within the eye cavity. A piezoelectric micropump actuator has been optimized to address the requirements of flow rates _6μl/min and a pressure ability of _120kPa while limiting the operating voltage to 150V and providing good energy efficiency to minimize the implant size. A Mathematica simulation has been performed to balance different performance values like the inverse proportional maximum pressure ability and flowrate. Driving the piezo at a pump frequency of 25Hz the estimated real flow rate will be around
110μl/min. Applying the necessary average flow rate of 2μl/min for glaucoma patients the system only needs to be active for less than half an hour per day, making a treatment adjusted by a physician feasible.


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Member since: Mar 2015
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Hubert Borgmann, MESSE BREMEN,
Project Manager ACTUATOR, International Conference and Exhibition on New Actuators and Drive Systems, Bremen, Germany, and Editor of the ACTUATOR Conference Proceedings (www.actuator.de)
Project Manager ITHEC, International Conference and Exhibition on Thermoplastic Composites, Bremen, Germany, and Editor of the ITHEC Conference Proceedings (www.ithec.de)

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