Lead Migration
Unwanted movement of implanted electrode leads from their original therapeutic position.
Full Definition
Lead migration refers to the displacement of implanted neuromodulation electrodes from their intended anatomical position after initial placement. This complication can occur due to factors such as inadequate anchoring, patient movement, tissue changes, or mechanical stress on the lead system. Migration may result in loss of therapeutic effect, uncomfortable sensations, or stimulation of unintended areas. The condition often requires surgical revision to reposition the leads or replace the entire system. Lead migration is one of the most common complications in neuromodulation procedures, with rates varying depending on the specific procedure, lead design, and anchoring techniques used.
Usage
Usage note: Distinguish from lead fracture, which involves physical damage to the electrode.
In Context
- "Imaging confirmed lead migration as the cause of decreased stimulation efficacy three months post-implantation." — Diagnostic imaging report
- "Improved anchoring techniques have significantly reduced lead migration rates in recent clinical series." — Surgical outcomes study