Neurostimulation Titration System with Feedback-Driven Dose Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current neurostimulation devices face challenges in efficiently titrating electrical stimulation therapy to minimize power consumption and prevent tolerance development, as they often require constant high doses that drain battery life and may lead to patient tolerance.
Innovation Solution
A system that adjusts electrical stimulation dosing based on patient feedback, transitioning from a loading dose to a maintenance dose that consumes less power, using a first device for the loading dose and a second, lower-powered device for the maintenance dose, with the option to deliver a rescue dose when needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a constant high dose of electrical stimulation is delivered to prevent tolerance development, then therapeutic effectiveness is maintained, but power consumption increases and battery life decreases
Solution Approach 1:
The system implements periodic action by delivering stimulation in alternating phases: a loading dose phase at high intensity to establish therapeutic effect and prevent tolerance, followed by a maintenance phase at lower intensity to sustain the effect with reduced power consumption. This periodic alternation between high and low dose states resolves the contradiction by ensuring therapeutic effectiveness during loading while minimizing power consumption during maintenance.
Solution Approach 2:
The loading dose serves as a preliminary action that prepares the system for subsequent maintenance. By delivering a high initial dose that establishes the therapeutic effect and prevents tolerance development upfront, the system enables later maintenance at lower doses, thereby resolving the power consumption issue while maintaining therapeutic effectiveness.
2Power
If a high-powered device is used to deliver loading doses, then adequate stimulation intensity is achieved, but device size and weight increase
Solution Approach 1:
The system segments the stimulation delivery function into two distinct operational modes: loading dose delivery and maintenance dose delivery. During loading doses, the full power capability of the device is utilized to provide adequate stimulation intensity. During maintenance phases, the device operates at lower power levels, allowing for reduced device size and weight while still meeting therapeutic requirements.
3Reliability
If frequent monitoring and adjustment of stimulation parameters is performed to optimize therapy, then therapeutic effectiveness improves, but device complexity and power consumption increase
Solution Approach 1:
The system implements dynamic parameter adjustment where stimulation parameters such as amplitude, pulse width, and frequency are varied based on the delivery phase (loading vs. maintenance) and patient response. This dynamic adaptation allows the system to optimize therapeutic effectiveness during loading doses while reducing parameter complexity during maintenance phases, resolving the contradiction between effectiveness and complexity.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor patient response to stimulation and automatically adjust parameters accordingly. During loading doses, feedback ensures adequate intensity is achieved; during maintenance, feedback fine-tunes parameters to maintain effectiveness with minimal adjustments, thereby improving therapeutic effectiveness without proportionally increasing device complexity.
Data Source
AI summary
An example system includes electrodes configured to deliver the electrical stimulation to a patient, and a device comprising processing circuitry configured to determine, for a patient, a loading dose of electric stimulation. The processing circuitry is also configured to cause electrical stimulation circuitry' to deliver, during a first time period, the loading dose to the patient, receive patient feedback representing a response of the patient to the loading dose, determine, based on patient feedback, a maintenance dose of electrical stimulation, and cause the electrical stimulation circuitry to deliver, and during a second time period that is after the first time period, a maintenance dose of electrical stimulation. Delivering the maintenance dose of electrical stimulation consumes less power than delivering the loading dose of electrical stimulation.