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Implementation of wireless power transfer and communications for an implantable ocular drug delivery system

Implementation of wireless power transfer and communications for an implantable ocular drug delivery system

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  • Author(s): T.B. Tang 1 ; S. Smith 1 ; B.W. Flynn 1 ; J.T.M. Stevenson 1 ; A.M. Gundlach 1 ; H.M. Reekie 1 ; A.F. Murray 1 ; D. Renshaw 1 ; B. Dhillon 2 ; A. Ohtori 3 ; Y. Inoue 3 ; J.G. Terry 1 ; A.J. Walton 1
    • View affiliations
    • Affiliations: 1: Institute for Integrated Micro and Nano Systems (Part of Institute of Integrated Systems, Edinburgh Research Partnership), School of Engineering and Electronics, The University of Edinburgh, Edinburgh, UK
      2: Institute for Integrated Micro and Nano Systems (Part of Institute of Integrated Systems, Edinburgh Research Partnership), School of Engineering and Electronics, Princess Alexandria Eye Pavilion, Edinburgh, UK
      3: Institute for Integrated Micro and Nano Systems (Part of Institute of Integrated Systems, Edinburgh Research Partnership), School of Engineering and Electronics, Senju Pharmaceutical Co. Ltd., Kobe, Japan
  • Source: Volume 2, Issue 3, September 2008, p. 72 – 79
    DOI:  10.1049/iet-nbt:20080001 , Print ISSN 1751-8741, Online ISSN 1751-875X
© The Institution of Engineering and Technology
Published

A wireless power transfer and communication system based on near-field inductive coupling has been designed and implemented. The feasibility of using such a system to remotely control drug release from an implantable drug delivery system is addressed. The architecture of the wireless system is described and the signal attenuation over distance in both water and phosphate buffered saline is studied. Additionally, the health risk due to exposure to radio frequency (RF) radiation is examined using a biological model. The experimental results demonstrate that the system can trigger the release of drug within 5 s, and that such short exposure to RF radiation does not produce any significant (≤1 °C) heating in the biological model. The conclusion of the work is that this system could replace a chemical battery in an implantable system, eliminating the risks associated with battery failure and leakage and also allowing more compact designs for applications such as drug delivery.

Inspec keywords: biomedical electronics; biomedical communication; inductive power transmission; biological effects of radiation; prosthetic power supplies; drug delivery systems; eye

Other keywords: implantable ocular drug delivery system; near field inductive coupling; wireless power transfer system; radiofrequency radiation exposure; water media signal attenuation; remote drug release control; wireless system architecture; phosphate buffered saline media signal attenuation; biological model; health risk; wireless communication system

Subjects: Patient care and treatment; Prosthetics and orthotics; Radio links and equipment; Biomedical communication; Health Physics; Other power transmission

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