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Journal Article

Deep-brain-stimulation does not impair deglutition in Parkinson's disease

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Kipping,  Judy
Hertie-Institute for Clinical Brain Research, Eberhard Karls University Tübingen, Germany;
Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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Citation

Lengerer, S., Kipping, J., Rommel, N., Weiss, D., Breit, S., Gasser, T., et al. (2012). Deep-brain-stimulation does not impair deglutition in Parkinson's disease. Parkinsonism & Related Disorders, 18(7), 847-853. doi:10.1016/j.parkreldis.2012.04.014.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0010-150D-6
Abstract
Objective
A large proportion of patients with Parkinson's disease develop dysphagia during the course of the disease. Dysphagia in Parkinson's disease affects different phases of deglutition, has a strong impact on quality of life and may cause severe complications, i.e. aspirational pneumonia. So far, little is known on how deep-brain-stimulation of the subthalamic nucleus influences deglutition in PD.

Methods
Videofluoroscopic swallowing studies on 18 patients with Parkinson's disease, which had been performed preoperatively, and postoperatively with deep-brain-stimulation-on and deep-brain-stimulation-off, were analyzed retrospectively. The patients were examined in each condition with three consistencies (viscous, fluid and solid). The ‘New Zealand Index for Multidisciplinary Evaluation of Swallowing (NZIMES) Subscale One’ for qualitative and ‘Logemann-MBS-Parameters’ for quantitative evaluation were assessed.

Results
Preoperatively, none of the patients presented with clinically relevant signs of dysphagia. While postoperatively, the mean daily levodopa equivalent dosage was reduced by 50% and deep-brain-stimulation led to a 50% improvement in motor symptoms measured by the UPDRS III, no clinically relevant influence of deep-brain-stimulation-on swallowing was observed using qualitative parameters (NZIMES). However quantitative parameters (Logemann scale) found significant changes of pharyngeal parameters with deep-brain-stimulation-on as compared to preoperative condition and deep-brain-stimulation-off mostly with fluid consistency.

Conclusion
In Parkinson patients without dysphagia deep-brain-stimulation of the subthalamic nucleus modulates the pharyngeal deglutition phase but has no clinically relevant influence on deglutition. Further studies are needed to test if deep-brain-stimulation is a therapeutic option for patients with swallowing disorders.