Impedance measuring device and method on basis of deep brain stimulator electrodes

Abstract

The invention discloses an impedance measuring device and method on the basis of deep brain stimulator electrodes. The device comprises a pulse emitting circuit, a signal amplifying circuit, an analog-to-digital conversion circuit, a processing controller, an electrode terminal selection module and the deep brain stimulator electrodes, wherein an output end of the processing controller is connected to a control end of the pulse emitting circuit and a control end of the electrode terminal selection module, an output end of the pulse emitting circuit is connected to the deep brain stimulator electrodes through the electrode terminal selection module, an input end of the signal amplifying circuit is connected to the deep brain stimulator electrodes through the electrode terminal selection module, and an output end of the signal amplifying circuit is connected to the processing controller through the analog-to-digital conversion circuit. The device and method can measure a contact impedance value between the deep brain stimulator electrodes and brain tissue and an impedance value among different pieces of the brain tissue.

Description

technical field [0001] The invention belongs to the field of implantable medical devices, and relates to an impedance measurement device and method based on electrodes of a deep brain stimulator. Background technique [0002] Deep brain stimulator (Deep Brain Stimulation, DBS) is to stimulate the brain nucleus by sending out electrical pulse signals to regulate abnormal neural circuits. Due to its minimally invasive nature, DBS has become a routine surgical method for the treatment of movement disorders such as essential tremor, Parkinson's disease, and dystonia. [0003] During DBS surgery, the placement position and contact effect of stimulating electrodes will have a significant impact on the therapeutic effect of DBS. The position of the electrode and the quality of the contact effect will directly affect the stimulation effect of the discharge pulse on the nuclei, thereby affecting the treatment of the disease. In actual operation, it can be judged by detecting the con...

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Problems solved by technology

The position of the electrode and the quality of the contact effect will directly affect the stimulation effect of the discharge pulse on the nuclei, thereby affecting the treatment of the disease. In actual operation, it can be judged by detecting the contact impedance value between the electrode of the deep brain stimulator and the brain tissue The contact effect between the electrode of the deep brain stimulator and the brain tissue. In addition, during the stimulation process, it is necessary to detect the impedance value between the brain tissue to adjust the stimulation parameters, so as to achieve a better stimulation effect. The contact impedance value between the stimulator electrode and the brain tissue, and the impedance value between the brain tissue related technical literature

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