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Bio-heat transfer model of deep brain stimulation-induced temperature changes
Maged M Elwassif1, Qingjun Kong, Maribel Vazquez
1Department of Biomedical Engineering, The City College of New York of The City University of New York, NY 10031, USA.
Journal of Neural Engineering
|November 25, 2006
Summary
Deep brain stimulation (DBS) can increase surrounding brain tissue temperature by up to 0.8°C. This study models thermal effects, revealing temperature changes depend on stimulation and tissue parameters.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Medical Physics
Background:
- Deep brain stimulation (DBS) is increasingly used for refractory neurological and psychiatric disorders.
- Physiologic effects of DBS are not fully understood, with prior research focusing on electrical polarization.
- The thermal impact of DBS on brain tissue requires investigation.
Purpose of the Study:
- To investigate the thermal effects of chronic deep brain stimulation (DBS).
- To quantify the magnitude and spatial distribution of DBS-induced temperature changes.
- To analyze the influence of various stimulation and tissue parameters on DBS-induced heating.
Main Methods:
- Utilized finite element modeling (FEM) to simulate DBS scenarios.
- Investigated parameters including stimulation waveform, lead design, and tissue properties (electrical/thermal conductivity, blood perfusion, metabolic heat generation).
- Assessed lead thermal conductivity and heat dissipation through the electrode.
Main Results:
- Clinical DBS protocols can elevate surrounding brain tissue temperature.
- Temperature increases can reach up to 0.8°C.
- The extent of temperature change is contingent upon specific stimulation parameters and brain tissue characteristics.
Conclusions:
- DBS generates measurable thermal effects in surrounding brain tissue.
- Finite element modeling provides valuable insights into DBS-induced temperature variations.
- Understanding these thermal effects is crucial for optimizing DBS therapy and patient safety.
