• Neuromodulation · Dec 2023

    Deep Brain Stimulation of the Central Lateral and Ventral Posterior Thalamus for Central Poststroke Pain Syndrome: Preliminary Experience.

    • Andreas Nowacki, David Zhang, Sabry Barlatey, Janine Ai-Schläppi, Jan Rosner, Marcel Arnold, and Claudio Pollo.
    • Department of Neurosurgery, Inselspital, Bern University Hospital, University Bern, Bern, Switzerland. Electronic address: neuro.nowacki@gmail.com.
    • Neuromodulation. 2023 Dec 1; 26 (8): 174717561747-1756.

    ObjectiveThe beneficial effects of thalamic deep brain stimulation (DBS) at various target sites in treating chronic central neuropathic pain (CPSP) remain unclear. This study aimed to evaluate the effectiveness of DBS at a previously untested target site in the central lateral (CL) thalamus, together with classical sensory thalamic stimulation (ventral posterior [VP] complex).Materials And MethodsWe performed a monocentric retrospective study of a consecutive series of six patients with CPSP who underwent combined DBS lead implantation of the CL and VP. Patient-reported outcome measures were recorded before and after surgery using the numeric rating scale (NRS), short-form McGill pain questionnaire (sf-MPQ), EuroQol 5-D quality-of-life questionnaire, and Beck Depression Inventory. DBS leads were reconstructed and projected onto a three-dimensional stereotactic atlas.ResultsNRS-but not sf-MPQ-rated pain intensity-was significantly reduced throughout the follow-up period of 12 months compared with baseline (p = 0.005, and p = 0.06 respectively, Friedman test). At the last available follow-up (12 to 30 months), three patients described a more than 50% reduction. Two of the three long-term responders were stimulated in the CL (1000 Hz, 90 μs, 3.5-5.0 mA), whereas the third preferred VP complex stimulation (50 Hz, 200 μs, 0.7-1.2 mA). No persistent procedure- or stimulation-associated side effects were noted.ConclusionsThese preliminary findings suggest that DBS of the CL might constitute a promising alternative target in cases in which classical VP complex stimulation does not yield satisfactory postoperative pain reduction. The results need to be confirmed in larger, prospective series of patients.Copyright © 2022 International Neuromodulation Society. Published by Elsevier Inc. All rights reserved.

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