Electrode dysfunctions in patients with deep brain stimulation: a clinical retrospective study

Area of Science:

• Neuroscience
• Biomedical Engineering
• Medical Devices

Background:

• Deep brain stimulation (DBS) hardware complications, including electrode fractures, can necessitate revision surgery.
• Subtle dysfunctions like short circuits or disconnections in DBS electrodes decrease treatment efficacy.
• Impedance measurements are crucial for detecting technical issues in DBS systems.

Observation:

• A retrospective analysis of 591 patients undergoing DBS for movement disorders was conducted.
• Systematic impedance checks were performed on 1,142 electrodes between 2005 and 2010.
• Data on electrode dysfunctions and their timing relative to surgery or generator replacement were collected.

Findings:

• Technical dysfunctions occurred in 3.2% of electrodes (36/1,142), with short circuits being most common.
• Following 109 impulse generator replacements, an additional 16 electrodes showed technical issues, primarily short circuits.
• Short circuits often occurred early post-surgery, while disconnections and loose contacts were more prevalent in long-term use.

Implications:

• Technical electrode dysfunctions, though infrequent, significantly affect DBS efficacy.
• In most cases, adjusting DBS programming can resolve issues and prevent the need for surgical intervention.
• Impedance monitoring is vital for early detection and management of DBS hardware problems.