Neuromodulation : journal of the International Neuromodulation Society
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To evaluate the long-term course of DBS electrodes with short-circuited contacts. ⋯ An increasing cumulative incidence demonstrates the clinical importance of short circuits. In the majority of electrodes, short circuits are restricted and remain restricted to two contacts during long-term stimulation.
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Avoiding Internal Capsule Stimulation With a New Eight-Channel Steering Deep Brain Stimulation Lead.
Novel deep brain stimulation (DBS) lead designs are currently entering the market, which are hypothesized to provide a way to steer the stimulation field away from neural populations responsible for side effects and towards populations responsible for beneficial effects. The objective of this study is to assess the performances of a new eight channel steering-DBS lead and compare this with a conventional cylindrical contact (CC) lead. ⋯ Currently, clinical trials are set up in Europe with a similar design as the steering-DBS lead. Our results illustrate the importance of the orientation of the new steering-DBS lead in avoiding side effects induced by stimulation of IC fibers. Therefore, in clinical trials sufficient attention should be paid to implanting the steering DBS-lead in the most effective orientation.
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In closed-loop on-demand control (ODC) of deep brain stimulation (DBS), stimulation is applied only when symptoms appear. Following stimulation of a fixed duration, DBS is switched off until the symptoms reappear. By repeating these demand-driven cycles, the amount of stimulation delivered can be decreased, thereby reducing DBS side-effects and improving battery-life of the pulse-generator. This article introduces Ro metric for quantification of degree of benefit of ODC and explores candidate selection in tremor-dominant Parkinson's disease (PD). ⋯ Ro values can be used for selection of optimal DS* in ODC. Three of nine patients were found to be tremor-free without stimulation for >50% of total time with even up to 80% in one patient. Patients with low Ro may not benefit from ODC in DBS, where the trade-off between having side-effects and using ODC system will need to be assessed.
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Deep brain stimulation (DBS) of the globus pallidus pars interna (GPi) and the subthalamic nucleus (STN) are established treatment option in Parkinson's disease (PD). If DBS does not provide the desired effect, re-operation to the alternative target is a treatment option, but data on the effect of re-operation are scarce. ⋯ Re-operation to a different target due to lack of effect appears to have a limited chance of leading to objective improvement if the leads were correctly placed during initial surgery.
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Deep brain stimulation (DBS) is a well-established therapy for otherwise intractable movement disorders. Thus far, most patients receive nonrechargeable implantable pulse generators (IPG). Eventually, another intervention to replace the IPG is inevitable. ⋯ Our findings imply that IPG longevity is shorter in the Activa PC compared to the Kinetra. Higher TEED and more frequent IPG replacements might reduce IPG longevity.