Σφακιανάκης Αλέξανδρος
ΩτοΡινοΛαρυγγολόγος
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Τρίτη 5 Ιουνίου 2018

Objective Predictors of 'Early Tolerance' to Ventral Intermediate Nucleus of Thalamus Deep Brain Stimulation in Essential Tremor Patients

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Publication date: Available online 5 June 2018
Source:Clinical Neurophysiology
Author(s): Shabbir Hussain Merchant, Sheng-Han Kuo, Yu Qiping, Linda Winfield, Guy McKhann, Sameer Sheth, Seth L. Pullman, Blair Ford
ObjectiveTo identify pre-operative clinical and computerized spiral analysis characteristics that may help ascertain which patients with Essential Tremor (ET) will exhibit 'early tolerance' to ventral intermediate nucleus of thalamus (Vim) deep brain stimulation (DBS).MethodsIdentification of comparative characteristics of defined cases of 'early tolerance' versus patients with sustained satisfactory response treated with Vim DBS surgery for medically-refractory ET, based on retrospective chart review by a clinician blinded to the findings of computerized spiral analysis.ResultsStatistically significant differences in two spiral analysis indices, SWVI and DoS, were found in the dominant upper limbs of patients who developed 'early tolerance', whereas the clinical characteristics were not significantly different.ConclusionObjective measurements of upper limb kinematics using graphonomic tests like spiral analysis should be considered in the pre-operative evaluation for DBS, especially in the setting of moderate-severe predominantly action and proximal postural tremors.SignificanceOurs is the first investigation looking into the pre-operative clinical and objective physiologic characteristics of the patients who develop 'early tolerance' to Vim DBS for the treatment of essential tremor. The study has significant implications for pre-operative evaluation and potential surgical target selection for the treatment of tremors.



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