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Related Experiment Video

Updated: Jul 1, 2025

Microelectrode Guided Implantation of Electrodes into the Subthalamic Nucleus of Rats for Long-term Deep Brain Stimulation

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Do Antibiotic-Impregnated Envelopes Prevent Deep Brain Stimulation Implantable Pulse Generator Infections? A

Michael Colditz¹, Tomas Heard¹, Peter Silburn¹

¹School of Medicine, University of Queensland, Brisbane, Queensland, Australia.

Stereotactic and Functional Neurosurgery

|March 10, 2024

Summary

Using an antibiotic envelope during deep brain stimulation (DBS) implanted pulse generator (IPG) replacement did not reduce infection rates in this study. Further research is needed to find cost-effective ways to lower IPG revisions and infections.

Keywords:

Antibiotic envelope infection Deep brain stimulation Implantable pulse generator

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Area of Science:

Neurosurgery
Infectious Disease Prevention
Medical Device Technology

Background:

Deep brain stimulation (DBS) implanted pulse generator (IPG) replacement infections are rare but serious, often necessitating system removal.
An antibiotic envelope, proven effective for cardiac implantable electronic devices (IEDs), releases minocycline and rifampicin to prevent infections.

Purpose of the Study:

To evaluate if using an antibiotic envelope during DBS IPG replacement reduces the incidence of post-operative infections.

Main Methods:

A prospective randomized study involved 427 patients undergoing routine IPG replacement.
Patients were assigned to receive IPG replacement with or without an antibiotic envelope, excluding those with prior DBS infections.
Infections requiring antibiotic therapy or IPG removal/revision were recorded over a minimum 12-month follow-up period.

Main Results:

The overall infection rate after IPG replacement was 2.1% (9/427).
Six infections occurred in the antibiotic envelope group (3.0%) and three in the non-envelope group (1.3%), with no statistically significant difference (p = 0.66).
The study groups were comparable regarding infection risk factors.

Conclusions:

This randomized trial demonstrated that antibiotic envelopes do not significantly reduce infection rates following routine DBS IPG replacement.
Additional research is necessary to identify effective and economical strategies for minimizing IPG revisions and infections.