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Electrode movement prevention - an animal model.

V Masopust1, I Petríková, M Mlček

  • 1Department of neurosurgery and neurooncoogy, First Faculty of Medicine, Charles University, Prague, Czech Republic. masopust.vaclav@gmail.com.

Physiological Research
|June 11, 2019
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Summary

Lateral migration of spinal cord stimulation (SCS) electrodes is a common issue. New fixation techniques using two anchors and a loop significantly reduce both lateral and longitudinal electrode migration, improving SCS device reliability.

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Area of Science:

  • Neurosurgery
  • Biomedical Engineering
  • Medical Devices

Background:

  • Electrode migration is a frequent complication in spinal cord stimulation (SCS).
  • While longitudinal migration is largely resolved, lateral migration remains a significant challenge.
  • Effective electrode fixation is crucial for long-term SCS efficacy and patient outcomes.

Purpose of the Study:

  • To introduce and evaluate novel electrode fixation methods to minimize lateral migration in SCS.
  • To assess the efficacy of a new fixation protocol in controlling both lateral and longitudinal electrode displacement.
  • To provide a statistically validated method for reducing SCS electrode migration in clinical practice.

Main Methods:

  • A pig model was utilized to test a new SCS electrode fixation protocol.
  • Two optical methods, digital image stereo-correlation and digital image processing, were employed to measure electrode displacement.
  • Three distinct lead fixation protocols were compared, including fixation with two anchors and a loop.

Main Results:

  • Fixation using two anchors significantly reduced overall electrode displacement.
  • The combined fixation of two anchors and a loop reduced lateral migration by 62.5% and longitudinal migration by 94.1%.
  • Statistical analysis confirmed significant differences between the fixation protocols (alpha=0.001).

Conclusions:

  • The novel electrode fixation method, particularly with two anchors and a loop, is highly effective in reducing both lateral and longitudinal migration.
  • The observed reduction in electrode displacement is statistically significant, supporting the clinical utility of the new method.
  • This improved fixation technique holds promise for enhancing the reliability and long-term success of spinal cord stimulation therapy.