Common Electrode Cyclic Voltammetry for Dynamic DBS
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Solution Overview
Problem
Deep brain stimulation (DBS) therapy often interacts with high medication levels, leading to undesired side effects due to variable medication absorption and compliance, necessitating objective measurement and monitoring of neurotransmitter levels to adjust therapy settings effectively.
Innovation Solution
An integrated cyclic-voltammetry and DBS-therapy system using common electrodes for both neurotransmitter measurement and stimulation delivery, enabling continuous feedback loop for precise and dynamic adjustment of stimulation therapy based on measured neurotransmitter levels, allowing for long-term monitoring and reduction of side effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate electrodes are used for neurotransmitter sensing and stimulation therapy, then sensing precision is improved, but device complexity and lead surface area increase
Solution Approach 1:
The patent applies multi-functionality by enabling common electrodes to perform both neurotransmitter sensing via cyclic voltammetry and stimulation therapy delivery. The same electrode serves dual purposes: detecting dopamine levels through electrochemical measurements and delivering DBS therapy currents, thereby eliminating the need for separate dedicated sensing electrodes and reducing lead complexity while maintaining functional capabilities
2Device complexity
If common electrodes are used for both sensing and stimulation, then device complexity is reduced, but measurement precision may deteriorate due to interference
Solution Approach 1:
The patent implements periodic action by alternating between sensing mode and stimulation mode in time-interleaved cycles. During sensing periods, the electrode performs cyclic voltammetry measurements to detect neurotransmitter levels; during stimulation periods, the same electrode delivers therapy currents. This temporal separation prevents interference between the two functions while maintaining measurement precision through regular monitoring cycles
Solution Approach 2:
The system employs feedback by continuously monitoring neurotransmitter levels through cyclic voltammetry and using this information to dynamically adjust stimulation therapy parameters. The measured dopamine levels feed back to the control system, which automatically modulates stimulation intensity to maintain optimal therapeutic effect, thereby ensuring measurement precision translates into effective therapy adjustment
3Ease of operation
If fixed stimulation therapy settings are used, then device operation is simple, but adaptability to varying neurotransmitter levels deteriorates
Solution Approach 1:
The patent applies dynamics by transitioning from fixed, static stimulation settings to dynamic, adaptive therapy delivery. The system continuously measures neurotransmitter levels and automatically adjusts stimulation parameters in real-time based on physiological state changes. This dynamic adaptation ensures optimal therapy effectiveness across varying conditions while maintaining ease of operation through automated closed-loop control that eliminates complex manual reprogramming
4Quantity of substance
If medication levels are monitored through subjective patient reports, then measurement cost is low, but measurement precision and objectivity deteriorate
Solution Approach 1:
The patent replaces the subjective, non-instrumental method of patient self-reporting with an objective electrochemical sensing system. Cyclic voltammetry technology measures neurotransmitter levels directly through electrical signals, providing quantitative, objective data about medication absorption and dopamine levels. This substitution of mechanical/electrical measurement for subjective reporting dramatically improves measurement precision and reliability while providing continuous monitoring capability
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 enables precise and adaptable DBS therapy by monitoring neurotransmitter levels, reducing side effects and improving treatment efficacy by correlating measurement and therapy directly at the target site, enhancing medication compliance monitoring and absorption status.
Implementation Method 1
determining, based on the electrical current, a value representative of a concentration of dopamine in the brain of the patient
Data Source
AI summary
A stimulation therapy system dynamically modifies therapy intensity based on measured neurotransmitter levels. In some examples, the system delivers, via an electrode implanted in a brain of a patient and stimulation circuitry, an electrical stimulus; monitors an electrical current generated by the stimulation circuitry to deliver the electrical stimulus; determines, based on the electrical current, a value representative of a concentration of dopamine in the brain of the patient; determines, based on the value representative of the concentration of dopamine, a value for one or more stimulation parameters that at least partially define electrical stimulation therapy; and delivers, via the electrode, the electrical stimulation therapy.