Leadless Pacemaker Docking Member for Snare Retrieval
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Solution Overview
Problem
Conventional cardiac pacemakers require leads that can complicate implantation and retrieval, whereas leadless cardiac pacemakers lack efficient delivery and retrieval mechanisms, posing challenges in their deployment and removal from the heart.
Innovation Solution
The design incorporates a docking member with a head and neck portion, facilitating retrieval through a snare mechanism, and a delivery system with a driver mechanism for secure implantation, enabling efficient deployment and retrieval of leadless cardiac pacing devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If leadless cardiac pacemakers are designed without delivery and retrieval features, then the device structure is simpler, but implantation and retrieval become difficult and complicated
Solution Approach 1:
The docking member is segmented into distinct functional portions: a head portion for engagement with retrieval/snare devices, a neck portion for structural connection, and integration with the housing. This segmentation allows the retrieval mechanism to interact with specific portions of the device without requiring complex overall device redesign.
Solution Approach 2:
The docking member acts as an intermediary structure between the leadless pacemaker housing and external retrieval/snare devices. It provides a standardized interface that mediates the interaction between the implanted device and delivery/retrieval tools, enabling safe and effective procedural intervention without direct contact with the housing.
2Ease of operation
If conventional pacemakers with leads are used, then delivery and retrieval are well-established, but the procedure is more complex and carries higher complication risks
Solution Approach 1:
The lead component is extracted/removed from the pacemaker system entirely. The leadless pacemaker design eliminates the electrical lead that connects the pulse generator to the heart, thereby removing the source of many complications associated with lead-related infections, dislodgments, and tissue damage while maintaining delivery and retrieval capabilities through the docking member interface.
Solution Approach 2:
The delivery and retrieval functions are merged into a single integrated docking member structure. This unified component serves both as the attachment point for delivery catheters during implantation and as the engagement target for retrieval snares during removal, simplifying the overall device architecture compared to separate lead and generator systems.
3Ease of operation
If the docking member has a large radial dimension for easy snare engagement, then retrieval is easier, but the device profile becomes larger
Solution Approach 1:
The docking member exhibits local quality variations: the head portion has a larger radial dimension optimized for snare engagement and manipulation, while the neck portion transitions to a smaller profile that integrates compactly with the housing. This localized enlargement provides the necessary engagement features only where required, maintaining an overall compact device profile.
Solution Approach 2:
The docking member employs asymmetric geometry with the head portion extending radially to provide engagement surfaces for snares, while the neck portion tapers to a smaller diameter. This asymmetric design allows optimal snare interaction at the head while minimizing the overall volume contribution of the docking member to the device profile.
Data Source
AI summary
An implantable leadless cardiac pacing device and associated delivery and retrieval devices. The implantable device includes a docking member extending from the proximal end of the housing of the implantable device configured to engage with the delivery and/or retrieval device to facilitate delivery and/or retrieval of the implantable leadless cardiac pacing device.