6 فروردین 1399

Using Preimplanted Deep Brain Stimulation Electrodes

Abstract
Background: Chronic stimulation of the thalamus is a surgical option in the management of intractable Holmes tremor.Patients with deep brain stimulation (DBS) can encounter infection as a postoperative complication, necessitating explantation of the hardware. Some studies have reported on the technique and the resulting efficacy of therapeutic lesioning through implanted DBS leads before their explantation. Case Description: We report the case of a patient with Holmes tremor who had stable control of symptoms ith DBS of the nucleus ventralis intermedius of the thalamus (VIM) but developed localized infection over the extension at the neck, followed by gradual loss of a therapeutic effect as the neurostimulator reached the end of its service life. Three courses of systemic  ntibiotic therapy failed to control the infection. After careful consideration, we decided to make a rescue lesion through the implanted lead in the right VIM before explanting the complete DBS hardware. The tremor was well controlled after the rescue lesion  rocedure, and the effect was sustained during a 2-year follow-up period. Conclusion: This case and the previously discussed ones from the literature demonstrate that making a rescue lesion through the DBS lead can be the last plausible option in cases where the  BS system has to be explanted because of an infection and reimplantation is a remote possibility.

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