Neurostimulation Grounding Electrode Positioning for Noise Reduction
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Solution Overview
Problem
Current neurostimulation systems face challenges in achieving precise spatial control over electrical stimulation and recording, leading to unwanted side effects and noise interference, particularly with thin film leads that struggle to incorporate a grounding electrode effectively.
Innovation Solution
A neurostimulation system with a grounding electrode positioned between two modules, connected via a cable, allowing for precise control of stimulation fields and reduced noise interference by establishing a defined return path for stimulation signals, thereby improving the signal-to-noise ratio and minimizing tissue encapsulation risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a grounding electrode is incorporated into thin film leads, then noise interference is reduced and signal-to-noise ratio is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The system is divided into separate modules: a pulse generator module and an electrode module with switch matrix. The grounding electrode is incorporated into the electrode module rather than the thin film lead, segmenting the grounding function from the lead structure to reduce manufacturing complexity while maintaining noise reduction benefits
Solution Approach 2:
A connecting cable serves as an intermediary component between the pulse generator and electrode module, carrying both stimulation signals and grounding connections. This mediator allows the grounding electrode to be positioned in the electrode module without requiring direct integration into the thin film lead structure
2Manufacturing precision
If a grounding electrode is positioned close to the electrodes, then the return path is shortened and stimulation precision is improved, but tissue encapsulation risk increases
Solution Approach 1:
The switch matrix enables dynamic reconfiguration of electrode connections, allowing the system to select different electrode combinations and grounding configurations based on treatment requirements. This dynamic capability allows optimization of the return path length while managing tissue encapsulation risk through programmable control
Solution Approach 2:
The system can change electrical parameters such as pulse width, amplitude, and electrode selection through the switch matrix. By adjusting these parameters, the effective return path characteristics can be modified to achieve precise spatial control while minimizing adverse tissue reactions
3Manufacturing precision
If multiple electrodes are selectively coupled via switch matrix, then stimulation field precision is improved, but device complexity increases
Solution Approach 1:
The switch matrix provides multi-functionality by enabling selective coupling between the pulse generator and multiple electrodes. A single switch matrix component performs the function of multiple discrete connections, allowing precise spatial control of stimulation fields while reducing the overall number of components needed
Solution Approach 2:
The switch matrix automatically routes stimulation signals to the selected electrode configuration based on control inputs. This self-routing capability eliminates the need for manual reconfiguration or additional control mechanisms, achieving precise spatial control through automated internal switching
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
The system achieves enhanced precision in neurostimulation and neurorecording by focusing the stimulation field and reducing noise, leading to improved therapeutic benefits and minimized side effects.
Implementation Method 1
The grounding electrode may be carried on a connecting cable that transfers power and/or stimulation signals between the first and second modules
Implementation Method 2
generating, by a pulse generator within a first housing of a first module, a stimulation signal, transmitting, by a connecting cable that connects the first module to a second module
Data Source
AI summary
The disclosure describes devices and systems that include a grounding electrode. In one example, a system may include a first module including a pulse generator within a first housing, a second module comprising a switch matrix within a second housing distinct from the first housing, a connecting cable that connects the first module to the second module, a grounding electrode disposed distal of the first module and proximal of the second module, and a plurality of electrodes disposed distal of the second module, wherein each electrode of the plurality of electrodes are selectively coupled to the pulse generator via the switch matrix. These devices or system can be used to provide neurostimulation and/or neurorecording.