Spinal Cord Stimulation Using Multi-Frequency Segmentation
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Solution Overview
Problem
Current spinal cord stimulation (SCS) techniques have shown variable clinical success and limited improvement in efficacy, with insufficient attention to temporal patterning and its effects on neuron activity in the dorsal horn pain processing circuit.
Innovation Solution
The method involves applying different patterns of electrical stimulation to distinct sub-populations of targeted neurological tissue at varying frequencies, using a pulse generator and electrode array to control and optimize the suppression of wide-dynamic range (WDR) neuron activity, thereby improving the efficacy and efficiency of SCS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional single-frequency electrical stimulation is applied to spinal cord tissue, then the stimulation system is simple to operate, but the clinical efficacy is variable and limited
Solution Approach 1:
The patent divides the spinal cord stimulation into multiple frequency components, applying different frequencies (e.g., 100 Hz and 200 Hz) to different sub-populations of nerve fibers simultaneously. This segmentation of the stimulation signal into distinct frequency bands allows for more targeted and effective modulation of pain pathways, improving clinical efficacy while maintaining manageable system complexity through programmable frequency delivery.
Solution Approach 2:
The patent employs multiple stimulation frequencies rather than a single frequency, changing the temporal parameter of the electrical stimulation. By delivering biphasic pulse trains at different frequencies to different fiber populations, the system optimizes activation of specific neural pathways involved in pain processing, thereby improving reliability of pain relief outcomes.
2Reliability
If high-frequency electrical stimulation is applied continuously to maximize pain relief, then the efficacy of stimulation is improved, but the average stimulation frequency and energy consumption increase
Solution Approach 1:
The patent employs periodic biphasic pulse trains delivered at specific frequencies (e.g., 100 Hz and 200 Hz) rather than continuous high-frequency stimulation. The periodic nature of the stimulation, with controlled pulse widths and inter-pulse intervals, allows for effective pain modulation while reducing overall energy consumption compared to continuous high-frequency delivery. The system achieves efficacy through optimized periodic activation rather than constant stimulation.
3Reliability
If multiple frequency patterns are applied to different sub-populations of neural tissue, then the suppression of WDR neuron activity is optimized, but the device complexity and programming requirements increase
Solution Approach 1:
The patent segments the neural tissue into different sub-populations based on fiber type and applies specific frequency patterns to each. By dividing the stimulation into targeted frequency bands that selectively activate different nerve fiber populations (e.g., A-beta fibers at 100 Hz, A-delta fibers at 200 Hz), the system optimizes suppression of wide-dynamic range (WDR) neurons while keeping the programming approach systematic and manageable through predefined frequency protocols.
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 significantly reduces WDR neuron activity, achieving greater pain relief and reducing the average stimulation frequency, resulting in more effective and efficient SCS compared to conventional methods.
Implementation Method 1
applying a first pattern of electrical stimulation to a first sub-population of targeted neurological tissue of a subject
Data Source
AI summary
Systems and methods for applying electrical stimulation to different sub-populations of targeted neurological tissue for optimizing spinal cord stimulation are disclosed. According to an aspect, a method includes applying a first pattern of electrical stimulation to a first sub-population of targeted neurological tissue of a subject. The method also includes applying a second pattern of electrical stimulation to a second sub-population of targeted neurological tissue of the subject, the second pattern of electrical stimulation being applied at a different frequency than the first pattern of electrical stimulation.