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Deep Brain Stimulation with Simultaneous fMRI in Rodents
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Optimization-Based Contact Fault Alleviation in Deep Brain Stimulation Leads.

Ruben Cubo, Mattias Astrom, Alexander Medvedev

    IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
    |January 12, 2018
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    Summary

    This study introduces an optimization method to manage faulty electrodes in deep brain stimulation (DBS) for conditions like Parkinson's Disease. The approach ensures treatment resilience by adjusting stimulation on remaining or neighboring contacts.

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    Area of Science:

    • Neurosurgery
    • Biomedical Engineering
    • Neurological Disorders

    Background:

    • Deep brain stimulation (DBS) is a critical neurosurgical treatment for Parkinson's Disease and other neurological conditions.
    • Increasing hardware complexity and electrode contacts in DBS leads raise concerns about potential contact failures.
    • Ensuring the reliability and therapeutic efficacy of chronic DBS is essential.

    Purpose of the Study:

    • To propose and evaluate an optimization-based approach for alleviating the impact of faulty DBS electrode contacts.
    • To enhance the resilience of field steering DBS therapy in the presence of hardware malfunctions.
    • To compare different fault compensation strategies for maintaining therapeutic outcomes.

    Main Methods:

    • Developed an optimization-based fault detection and alleviation scheme for DBS.
    • Investigated two compensation strategies: increasing amplitude on active contacts and using neighboring contacts.
    • Compared fault compensation methods against pre-fault stimulation parameters.
    • Utilized a model-based optimization procedure to designate alleviating contacts.

    Main Results:

    • Both amplitude adjustment and using neighboring contacts effectively compensate for faulty DBS contacts.
    • Model-based optimization is necessary for designating appropriate alleviating contacts.
    • Increased number of stimulating contacts enhances robustness to contact faults, albeit with decreased selectivity.

    Conclusions:

    • The proposed optimization approach effectively mitigates the impact of faulty DBS contacts, ensuring treatment resilience.
    • Field steering DBS systems can be made more robust through intelligent fault management strategies.
    • Future DBS systems with more contacts may offer improved fault tolerance, requiring careful consideration of selectivity trade-offs.