Leadless Pacing Device Coronary Sinus Segmentation
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Solution Overview
Problem
There is a need for alternative medical devices and delivery systems for cardiac pacing that can effectively sense and stimulate cardiac events without the limitations of conventional lead-based systems, particularly for leadless pacing devices that can be positioned and function within the coronary sinus.
Innovation Solution
A leadless pacing device with a housing positioned in the coronary sinus, a distal extension, electrodes, and a processing module that determines cardiac events based on near-field and far-field signals, generating stimulation pulses as needed, and a delivery system for precise placement within the heart.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a leadless pacing device is positioned within the coronary sinus to minimize tissue contact and allow blood flow, then device safety and blood flow are improved, but the ability to effectively sense and stimulate cardiac events across multiple chambers becomes more difficult
Solution Approach 1:
The device is segmented into distinct functional components: a housing positioned in the coronary sinus and a distal extension with electrodes that can contact cardiac tissue. This segmentation allows the housing to minimize tissue contact while the distal extension performs the sensing and stimulation functions effectively.
Solution Approach 2:
The distal extension acts as an intermediary between the housing (positioned in coronary sinus) and the cardiac tissue. It transmits sensing signals from the tissue to the processing module and delivers stimulation pulses from the power supply to the tissue, enabling effective cardiac event detection and treatment while the housing remains non-invasive.
2Device complexity
If a leadless pacing device integrates all components (power supply, processing module, electrodes) into a single housing, then device complexity is reduced, but the ability to position electrodes optimally for multi-chamber sensing and stimulation is limited
Solution Approach 1:
The device is divided into a housing containing the power supply and processing module, and a separate distal extension containing the electrodes. This segmentation maintains relative simplicity while providing the flexibility needed to position electrodes optimally for sensing and stimulating multiple cardiac chambers.
Solution Approach 2:
The distal extension extends the device into a different spatial dimension (distally beyond the housing), allowing electrodes to reach cardiac tissue in multiple chambers while the main housing remains positioned in the coronary sinus. This dimensional extension provides positioning flexibility without significantly increasing overall device complexity.
3Measurement precision
If a leadless pacing device uses near-field signals for sensing cardiac events, then sensing precision is improved, but the ability to detect events in distant chambers is reduced
Solution Approach 1:
The sensing function is segmented across multiple electrodes: the housing contains electrodes for sensing local events, while the distal extension contains additional electrodes that can detect events in more distant chambers. This segmentation enables the device to maintain high sensing precision for local events while also detecting distant chamber events.
Solution Approach 2:
The multiple electrodes distributed across the housing and distal extension serve universal sensing functions, with each electrode capable of detecting cardiac events in its local field. Collectively, they provide multi-chamber event detection capability while maintaining near-field sensing precision for each individual electrode.
Data Source
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AI summary
A leadless pacing device may include a housing, a distal extension extending distally of a distal end of the housing, one or more electrodes supported by the housing, a distal electrode supported by the distal extension, and a processing module located within an interior space of the housing and electrically coupled to the one or more electrodes supported by the housing and the distal electrode supported by the distal extension. The housing may be positioned within a coronary sinus and the distal extension may be positioned within a vessel extending from the coronary sinus. The processing module may determine whether cardiac events occurred based on near-field signals and/or far-field signals sensed using the one or more electrodes supported by the housing and the distal electrode. The processing module may generate cardiac stimulation pulses based on the determination of whether a cardiac event occurred and where it occurred.