Implantable Pulse Generator with Arbitrator for Spinal Cord Stimulation
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Solution Overview
Problem
Current spinal cord stimulators face challenges with high power consumption, requiring frequent recharging and limited ability to generate diverse stimulation patterns simultaneously, making it difficult to effectively treat varying pain levels across different body areas.
Innovation Solution
An implantable pulse generator with a programmable signal generator that can operate without processor intervention, featuring control registers for stimulation channels, an arbitrator to prevent simultaneous channel activation, and high frequency generators for flexible pulse parameter programming, allowing for independent amplitude control and burst frequency modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the processor continuously controls signal generation, then stimulation patterns can be dynamically adjusted, but power consumption increases requiring frequent recharging
Solution Approach 1:
The patent divides the signal generation function into two parts: a programmable signal generator that operates autonomously using stored parameters, and a processor that only intervenes for initial programming and parameter updates. This segmentation allows the processor to remain in standby mode during signal generation, dramatically reducing power consumption while preserving the ability to dynamically adjust stimulation patterns when needed.
2Adaptability or versatility
If multiple stimulation channels operate simultaneously with different patterns, then treatment flexibility for varying pain levels improves, but power consumption and circuit complexity increase
Solution Approach 1:
The patent implements dynamic channel arbitration that allows multiple stimulation channels to be programmed with different patterns and parameters, but only one channel is actively stimulated at any given time. The arbitrator dynamically selects which channel to activate based on programmed conditions, providing treatment flexibility for varying pain levels while preventing simultaneous operation that would excessive power consumption.
3Adaptability or versatility
If multiple stimulation channels are programmed with different patterns, then ability to treat different body areas improves, but risk of power supply overload increases
Solution Approach 1:
The patent introduces an arbitrator circuit as an intermediary between the multiple programmed channels and the power supply. The arbitrator monitors the status of all channels and ensures that only one channel is activated at a time, preventing power supply overload while maintaining the ability to treat different body areas by switching between channels as needed.
Data Source
AI summary
An implantable pulse generator (IPG) that generates spinal cord stimulation signals for a human body includes an electrode driver for each electrode, which adjusts the amplitude of the timing signals and output an output current corresponding to the adjusted signals for transmission to the associated electrode so as to enable independent amplitude control of the stimulation signals for each stimulation pattern channel.