DBS Electrodes With Single Disconnected Contacts: Long-Term Observation and Implications for the Management

Open and short circuits of electrode contacts are important technical dysfunctions of DBS. Here, we report on another type of dysfunction restricted to a single electrode contact: impedance instability within regular absolute values. After 9-year subthalamic DBS, a Parkinson patient developed unilateral motor symptoms and intermittent dysaesthesia due to impedance instability of the active contact. DBS efficacy could be restored without surgical revision by activation of the neighboring contact. During 3-year-follow-up, impedances of the dysfunctional contact varied between 1 and 3 kΩ whereas the other three contacts remained stable. Impedance documentation is crucial to identify such dysfunctions.

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Unstable impedance of a single electrode contact resulting in loss of DBS therapy—a case report

Allert

Lindlau²,

Quindt³

et al. 2018

Acta Neurochir

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DBS dysfunction mimicking transient ischemic attacks—a case report

et al. 2020

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Surgical Treatment of Parkinson Disease

Mitchell

Ostrem

2020

Neurologic Clinics

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DBS Electrodes With Single Disconnected Contacts: Long-Term Observation and Implications for the Management

Cited by 3 publications

References 23 publications

Unstable impedance of a single electrode contact resulting in loss of DBS therapy—a case report

Unstable impedance of a single electrode contact resulting in loss of DBS therapy—a case report

DBS dysfunction mimicking transient ischemic attacks—a case report

Surgical Treatment of Parkinson Disease

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