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Comparative analysis of explanted DBS electrodes.

Michele Rizzi1,2, Alessandro De Benedictis3, Giuseppe Messina4

  • 1Department of Neurosurgery, IRCCS Foundation Neurological Institute "Carlo Besta", Milan, Italy. michele.rizzi@live.it.

Acta Neurochirurgica
|September 9, 2015
PubMed
Summary
This summary is machine-generated.

Deep brain stimulation (DBS) electrode wear is linked to implantation duration, not device malfunction. This study shows time-related degradation of the external layer, crucial for predicting hardware issues.

Keywords:
DBSElectrodes analysisEnergy dispersive X-rayEnvironmental biodegradationExplanted electrodesScanning electron microscope

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Area of Science:

  • Neuroscience
  • Biomaterials Science
  • Medical Device Engineering

Background:

  • Hardware complications are common in deep brain stimulation (DBS) systems.
  • Microscopy and spectroscopy are key for analyzing malfunctioning DBS electrodes.
  • Previous work identified morphological and chemical changes in a malfunctioning electrode.

Observation:

  • Two explanted DBS electrodes, not removed due to system failure, were analyzed.
  • Scanning electron microscopy and energy-dispersive X-ray spectroscopy were employed.
  • Results were compared to new and previously analyzed malfunctioning electrodes.

Findings:

  • External polyurethane wear on DBS electrodes correlates with implantation time.
  • This degradation is independent of electrode function and therapy parameters.
  • This is the first study demonstrating time-related degradation of the DBS electrode external layer.

Implications:

  • Understanding time-related material degradation is vital for DBS hardware reliability.
  • Analysis of morphological and chemical properties can predict hardware impairment.
  • Findings can inform the development of more bio-stable DBS systems.