Selective Neuromodulation Apparatus with Impedance Feedback
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Solution Overview
Problem
Traditional neuromodulation systems face challenges with incorrect electrode placement and reduced efficacy due to non-invasive methods relying on pre-set intensity and non-specific targeting of nerve stimulation, leading to potential nerve damage and suboptimal therapeutic outcomes.
Innovation Solution
A neuromodulation apparatus with a plurality of active electrodes and a reference electrode, a pulse generator, and a control unit that measures resistance and current-voltage characteristics to selectively deliver pulses, adjusting pulse shape and electrode selection based on patient response and movement detection, ensuring precise targeting of nerves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If non-invasive electrodes are placed on skin based on pre-set factory intensity and expected position, then the device complexity is reduced and ease of operation is improved, but the manufacturing precision of electrode placement deteriorates and reliability of nerve targeting worsens
Solution Approach 1:
The system performs self-positioning by automatically detecting impedance characteristics at multiple electrode sites and selecting the optimal electrode pair for nerve stimulation without requiring manual positioning by the operator. The control unit autonomously measures impedance values and determines which electrodes are closest to the target nerve based on these measurements.
Solution Approach 2:
The system incorporates impedance measurement feedback to continuously monitor and evaluate electrode-to-nerve proximity. By measuring electrical impedance between active electrodes and reference electrodes, the system receives feedback about tissue characteristics and adjusts electrode selection accordingly to maintain optimal positioning.
2Reliability
If multiple active electrodes are used with selective pulse transmission controlled by impedance measurement, then the reliability of nerve targeting is improved and manufacturing precision of placement is improved, but the device complexity increases
Solution Approach 1:
The electrode array is divided into multiple independently controllable active electrodes, each capable of receiving or transmitting pulses separately. This segmentation allows the system to selectively activate specific electrodes based on impedance measurements, thereby improving targeting reliability while managing complexity through modular control.
Solution Approach 2:
The control unit performs multiple functions: it measures impedance between electrode pairs, processes the measured values to determine optimal electrode selection, controls pulse generation timing and intensity, and monitors patient responses. This multi-functionality consolidates complexity into a single intelligent control unit rather than requiring separate dedicated components for each function.
3Manufacturing precision
If traditional needle electrodes are inserted into immediate vicinity of nerve, then the manufacturing precision of electrode placement is improved, but the object-affected harmful factors increase due to risk of nerve damage
Solution Approach 1:
Electrical impedance measurements serve as an intermediary indicator of electrode-to-nerve proximity. Instead of directly inserting electrodes near the nerve (which causes harm), the system uses impedance characteristics of the tissue between the electrode and nerve as a safe mediator to infer and optimize positioning without direct contact with the nerve.
Solution Approach 2:
The patent replaces the mechanical insertion method (needle electrodes physically inserted near the nerve) with an electrical field-based method. By using electrical impedance measurements and controlled current stimulation through surface electrodes, the system achieves nerve targeting without mechanical invasion, thereby eliminating the associated risks of nerve damage.
4Ease of operation
If factory pre-set intensity is used for neuromodulation pulses, then the ease of operation is improved, but the adaptability to individual patient anatomy deteriorates
Solution Approach 1:
The system transitions from static factory-pre-set intensity values to dynamic, adaptive intensity control. The control unit continuously measures impedance characteristics, processes these values in real-time, and adjusts pulse intensity and electrode selection dynamically based on the specific patient's anatomy and tissue properties, thereby achieving both ease of operation and high adaptability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the accuracy and efficacy of neuromodulation by optimizing electrode placement and pulse delivery, improving therapeutic outcomes and reducing the risk of nerve damage.
Implementation Method 1
a control unit coupled to the electrical pulse generator and adapted to measure a resistance and/or a current-voltage characteristic between each active electrode of the plurality of active electrodes and the at least one reference electrode
Data Source
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AI summary
A neuromodulation apparatus and method of using the same. The neuromodulation apparatus has a plurality of active electrodes electrically isolated from each other and arranged in at least one electrodes array, at least one reference electrode, a pulse generator electrically connected to each active electrode of the plurality of active electrodes and configured to selectively transmit electric pulses to each of the plurality of active electrodes and a control unit coupled to the electrical pulse generator and adapted to measure a resistance and/or a current-voltage characteristic between each active electrode of the plurality of active electrodes and the at least one reference electrode.