Biventricular Cardiac Stimulator Automatic Switching Control
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Solution Overview
Problem
Biventricular cardiac stimulators often rely on right-ventricular sensing electrodes for timing, which can lead to suboptimal performance due to the higher dislocation rate of left-ventricular electrode lines, especially in the initial weeks after implantation, resulting in inadequate synchronization and potential ventricular tachycardia.
Innovation Solution
A programmable automatic switch in the pacemaker timer that can switch between primarily right-ventricular and primarily left-ventricular control based on stability parameters detected by the left-ventricular sensing unit, ensuring stable electrode position evaluation and adaptive control for improved synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If left-ventricular electrode lines are used for sensing and stimulation, then cardiac resynchronization therapy performance is improved, but the probability of electrode line dislocation increases
Solution Approach 1:
The system dynamically switches between primarily right-ventricular control and primarily left-ventricular control based on detected stability parameters. The programmable automatic switch in the pacemaker timer allows the system to adapt its control mode in real-time, transitioning from a static control architecture to a dynamic one that responds to electrode stability conditions.
Solution Approach 2:
The detection unit continuously monitors stability parameters characteristic of electrode position stability and feeds this information back to the pacemaker timer. This feedback mechanism enables the system to automatically adjust its control mode based on the current stability status of the left-ventricular electrode line, ensuring optimal performance while accounting for dislocation risks.
2Stability of the object's composition
If primarily right-ventricular control is used in the initial weeks, then electrode dislocation risks are reduced, but cardiac resynchronization therapy efficacy is compromised
Solution Approach 1:
The system is pre-programmed with the capability to operate in primarily right-ventricular control mode during the initial weeks after implantation, when electrode stability is compromised. This preliminary configuration allows the system to function safely during the critical early period, and the automatic switch will transition to primarily left-ventricular control once stability parameters indicate the electrode has stabilized.
3Adaptability or versatility
If automatic switching between control modes is implemented, then therapy optimization is improved, but device complexity increases
Solution Approach 1:
The pacemaker timer incorporates a programmable automatic switch that autonomously transitions between primarily right-ventricular control and primarily left-ventricular control based on stability parameter detection. This self-service mechanism eliminates the need for manual reprogramming by clinicians, allowing the device to automatically optimize its control mode in response to electrode stability conditions.
Data Source
AI summary
A biventricular cardiac stimulator has a right-ventricular sensing unit, having or connected to a terminal for a right-ventricular sensing electrode, a left-ventricular sensing unit, having or connected to a terminal for a left-ventricular sensing electrode, and a pacemaker timer, which is connected to the right-ventricular sensing unit and the left-ventricular sensing unit. The cardiac stimulator has a programmable automatic switch, which is effectively connected to the pacemaker timer to switch the pacemaker timer optionally between a primarily right-ventricular control and a primarily left-ventricular control, as well as an evaluation unit, which is effectively connected to the switch and is designed to detect and evaluate at least one stability parameter that is characteristic of the stability of the electrode position of the left-ventricular sensing electrode, whereby the programmable automatic switch is designed to automatically switch the pacemaker timer control as a function of a value of the detected stability parameter.