Leadless Cardiac Stimulation Device Distributed Logic
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Solution Overview
Problem
Conventional implantable cardiac rhythm management systems face challenges with lead-related issues such as fatigue failures, insulation failures, and difficulty in extraction, which can lead to ineffective treatment of cardiac arrhythmias like bradycardia and tachycardia.
Innovation Solution
The development of a leadless intrathoracic cardiac stimulation system using distributed logic for cardiac activity detection and energy delivery, comprising multiple autonomous devices implanted in various heart chambers, each with energy delivery circuitry, detection circuitry, and communication capabilities to coordinate therapy delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional implantable cardiac rhythm management systems use leads and electrodes to sense and deliver energy, then cardiac arrhythmia treatment is achieved, but lead-related issues such as fatigue failures, insulation failures, and difficulty in extraction occur
Solution Approach 1:
The patent removes the lead component entirely from the system. Instead of using transvenous leads that penetrate the heart muscle, the invention uses a leadless implantable cardioverter-defibrillator (ICD) with electrodes that are applied to the heart surface through a minimally invasive procedure, eliminating the mechanical lead structure that causes fatigue failures, insulation failures, and extraction difficulties
Solution Approach 2:
The patent replaces the mechanical lead system with an electronic sensing and energy delivery system. The ICD uses electronic sensors to detect cardiac electrical signals and electronic energy delivery circuits to terminate arrhythmias, substituting the mechanical lead structure with an all-electronic solution that eliminates mechanical wear and insulation degradation
2Reliability
If leadless intrathoracic cardiac stimulation system uses distributed logic with multiple autonomous devices, then lead-related issues are eliminated, but device complexity increases
Solution Approach 1:
The patent divides the cardiac rhythm management function into multiple independent ICD units, each capable of autonomous sensing and energy delivery. These segmented devices are implanted in different cardiac chambers or locations, with each unit operating independently but coordinated through communication circuits, allowing the system to achieve high reliability through redundancy while managing complexity through modular design
Solution Approach 2:
Each ICD unit in the distributed system is designed with autonomous decision-making capability, incorporating its own sensing circuits, processing logic, and energy delivery systems. The devices self-monitor their own function, detect arrhythmias independently, and execute treatment algorithms without requiring continuous external control, thereby reducing the complexity of centralized control systems
Data Source
AI summary
Systems and methods involve an intrathoracic cardiac stimulation device operable to provide autonomous cardiac sensing and energy delivery. The cardiac stimulation device includes a housing configured for intrathoracic placement relative to a patient's heart. A fixation arrangement of the housing is configured to affix the housing at an implant location within cardiac tissue or cardiac vasculature. An electrode arrangement supported by the housing is configured to sense cardiac activity and deliver stimulation energy to the cardiac tissue or cardiac vasculature. Energy delivery circuitry in the housing is coupled to the electrode arrangement. Detection circuitry is provided in the housing and coupled to the electrode arrangement. Communications circuitry may optionally be supported by the housing. A controller in the housing coordinates delivery of energy to the cardiac tissue or cardiac vasculature in accordance with an energy delivery protocol appropriate for the implant location.