Implantable Myocardial Stimulation With Impedance Feedback
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Solution Overview
Problem
Conventional treatments for myocardial conditions, such as myocardial infarction, lack the capability to monitor and support therapeutic changes, including fibroblast activation, matrix metalloproteinase balance, collagen content, regional stiffness, tensile strength, compliance, and left ventricular remodeling, which are crucial for effective treatment outcomes.
Innovation Solution
A system comprising an electrical stimulator and monitor that applies stimulating electrical signals to the myocardial infarction region, using bipolar or unipolar leads to induce therapeutic changes, while monitoring electrical impedance to assess and control the treatment process, ensuring the signals remain confined to the infarction region and avoid viable tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional treatments for myocardial infarction are used, then basic medical care is provided, but the capability to monitor and support therapeutic changes is lacking
Solution Approach 1:
The patent implements a feedback mechanism where electrical impedance measurements are continuously taken from the myocardial infarction region and used to adjust stimulation parameters. The system monitors therapeutic changes in real-time and modifies treatment delivery based on measured impedance variations, creating a closed-loop control system that enhances treatment reliability while providing continuous therapeutic state information.
2Reliability
If stimulating electrical signals are applied to the myocardial infarction region, then therapeutic changes are produced, but there is risk of affecting viable tissue
Solution Approach 1:
The patent employs local quality by delivering electrical stimulation through catheter electrodes positioned specifically within the myocardial infarction region. The stimulation is localized to the infarcted tissue through precise electrode placement and controlled electrical field confinement, ensuring that viable surrounding tissue receives minimal to no stimulation while the infarction region undergoes desired therapeutic changes.
Solution Approach 2:
The patent uses electrical impedance as an intermediary parameter to guide and control stimulation delivery. By measuring impedance characteristics of the infarction region, the system identifies optimal stimulation parameters and thresholds that achieve therapeutic effects on infarcted tissue while maintaining safety margins for viable tissue protection.
3Loss of information
If electrical impedance monitoring is implemented, then therapeutic state can be assessed, but device complexity increases
Solution Approach 1:
The patent integrates multiple functions into a single implantable system: the same catheter electrodes used for electrical stimulation are also used for impedance measurement. The implantable pulse generator performs both stimulation delivery and impedance monitoring, eliminating the need for separate monitoring hardware and reducing overall device complexity while providing comprehensive therapeutic state assessment.
Data Source
AI summary
An implantable system can treat a myocardial condition, for example a myocardial infarction region. The system can selectively apply stimulating electrical signals to the myocardial infarction region. The region can respond to the stimulating electrical signals by undergoing favorable therapeutic change, for example an increase in thickness of the region. The system can monitor electrical impedance of the region as an indicator of degree of regional therapeutic change or of regional therapeutic state. The monitoring results can guide or control the application of stimulating electrical signals. For example, the application of stimulating electrical signals can stop once the monitor detects a sufficient degree of favorable therapeutic change and can resume if the monitor detects a threshold degree of therapeutic regression.