Two-Stage Neurostimulation for Reducing Side Effects
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Solution Overview
Problem
Current non-invasive neurostimulation methods for treating neurological and psychiatric disorders often require high stimulus intensities to achieve therapeutic effects, which can lead to side effects and reduced effectiveness, especially when using low intensities to minimize discomfort and target specificity.
Innovation Solution
A two-stage neurostimulation approach using a device with a control unit and stimulation unit that alternates between a rapidly varying sequence at low stimulus intensity and a slowly varying sequence at higher intensity, allowing for robust therapeutic effects while minimizing side effects and increasing treatment efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high stimulus intensities are used to achieve therapeutic effects, then treatment effectiveness is improved, but side effects increase and patient comfort deteriorates
Solution Approach 1:
The patent applies periodic action by using alternating sequences of rapidly varying and slowly varying stimulus patterns. The stimulation is delivered in periodic cycles where high-intensity stimuli are interspersed with low-intensity stimuli, creating a rhythmic pattern that maintains therapeutic effectiveness while reducing cumulative side effects. This periodic alternation allows the neural tissue to recover between high-intensity pulses.
Solution Approach 2:
The patent implements parameter changes by dynamically varying multiple stimulation parameters including intensity, frequency, and temporal pattern. The system switches between different stimulation modes (rapidly varying sequence vs. slowly varying sequence) and adjusts parameters such as stimulus duration, inter-stimulus intervals, and amplitude to optimize the balance between therapeutic effect and side effect minimization.
2Object-affected harmful factors
If low stimulus intensities are used to minimize side effects, then patient comfort is improved, but treatment effectiveness decreases
Solution Approach 1:
The periodic alternation between low-intensity and high-intensity stimulation sequences ensures that low-intensity stimuli (which improve comfort) are supplemented by periodic high-intensity bursts (which maintain effectiveness). The low-intensity phases allow patient comfort while the periodic high-intensity phases ensure sufficient neural modulation for therapeutic effect.
Solution Approach 2:
The system employs dynamic adaptation by continuously adjusting stimulation parameters based on real-time feedback and pre-programmed protocols. The stimulation intensity and pattern are not static but dynamically modulated, switching between conservative low-intensity modes and more aggressive high-intensity modes to maintain effectiveness while minimizing side effects throughout the treatment session.
3Reliability
If high stimulus intensities are used to overcome pathological synchronization, then desynchronization effect is improved, but patient discomfort increases
Solution Approach 1:
The periodic alternation between rapidly varying and slowly varying sequences creates a rhythmic stimulation pattern that achieves desynchronization through repeated cycles. The high-intensity phases provide strong desynchronization effects while the low-intensity phases provide recovery time, maintaining overall desynchronization effectiveness without sustained patient discomfort.
Solution Approach 2:
The patent segments the stimulation protocol into distinct phases: rapidly varying sequences for strong desynchronization effect and slowly varying sequences for comfort and consolidation. This segmentation allows each phase to perform its specialized function optimally while the combination achieves the overall therapeutic goal with improved patient tolerance.
Data Source
AI summary
A device for stimulating neurons that includes a non-invasive stimulation unit for generating stimuli in stimulation channels. A control unit controls the stimulation unit during first and second time intervals in different stimulation modes. The control unit controls the stimulation unit during 75% or more of the first time interval in the first stimulation mode to repeatedly generate sequences of stimuli and the order in which the stimulation channels generate stimuli is constant for not more than 5 successively generated sequences and then varied. The control unit controls the stimulation unit during 75% or more of the second time interval in a second stimulation mode such that the stimulation channels repeatedly generate sequences of stimuli and the order in which the stimulation channels generate stimuli is constant for at least 25 successively generated sequences and then varied.