Longitudinal Follow-up of Impedance Drift in Deep Brain Stimulation Cases

Abstract

The drift in impedance observed primarily within the first 6 months is in keeping with prior studies and is likely due to surgical micro-lesioning effects and brain parenchyma remodeling at the electrode-tissue interface, typically at values approximating 1,000 <i>Ω</i>. The differences in impedance trends over time in the various DBS targets may be due to underlying differences in structure and tissue composition.