Ultrasonic distance detection for a closed-loop spinal cord stimulation system

E.A. Dijkstra, J. Holsheimer, Wouter Olthuis, Piet Bergveld

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    4 Citations (Scopus)
    83 Downloads (Pure)

    Abstract

    When stimulating the spinal cord at a constant strength, the current density in the spinal cord and thus the effects on chronic, intractable pain and vascular insufficiency will change with body position, due to the varying separation of the spinal cord and the stimulating electrode. The current density in the spinal cord has to remain between the perception and discomfort threshold (stimulation window) for a good therapeutic effect, i.e. that the patient does not suffer from pain. The stimulation window is very small. In current SCS systems the stimulus applied to the electrode is set at a constant value. A major improvement could be achieved when the distance between stimulation electrode and spinal cord could be measured and used to control the stimulus amplitude in a closed-loop system. An ultrasonic piezoelectric transducer was chosen to measure the distance between the electrode and the spinal cord
    Original languageUndefined
    Title of host publicationProceedings 19th annual International conference IEEE Eng. in Medical & Biological Society
    Place of PublicationChicago, USA
    PublisherIEEE
    Pages1954-1957
    Number of pages4
    ISBN (Print)CD-ROM 0-7803-4
    DOIs
    Publication statusPublished - 30 Oct 1997
    Event19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 1997 - Chicago, United States
    Duration: 30 Oct 19972 Nov 1997
    Conference number: 19

    Publication series

    Name
    PublisherIEEE
    Volume5

    Conference

    Conference19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 1997
    Abbreviated titleEMBC
    CountryUnited States
    CityChicago
    Period30/10/972/11/97

    Keywords

    • METIS-114290
    • IR-17395

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