Leadless Biostimulator Slidable Frame for Cardiac Pacing
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Solution Overview
Problem
Conventional cardiac pacing systems rely on implanted leads, which can be cumbersome and prone to complications, necessitating an improvement in the technology for more efficient and reliable cardiac stimulation.
Innovation Solution
The development of an implantable leadless biostimulator with extensible and retractable fixation tines, which can be precisely positioned and secured within the heart tissue using a transport system, allowing for both implantation and retrieval without the need for leads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lead-based cardiac pacing systems are used, then reliable cardiac stimulation can be achieved, but the system becomes cumbersome and prone to complications
Solution Approach 1:
The patent extracts and removes the lead component from the cardiac pacing system, transitioning from a lead-based system to a leadless system. The biostimulator is self-contained with integrated electrodes and fixation tines, eliminating the need for separate leads that connect the pulse generator to the heart, thereby reducing device complexity while maintaining stimulation reliability
Solution Approach 2:
The patent merges multiple functions into a single integrated biostimulator device. The housing contains the pulse generator, electrodes for cardiac stimulation, and fixation tines for anchoring are all combined in one implantable unit, eliminating the need for separate leads and reducing overall system complexity
2Reliability
If fixation tines are extended into target tissue, then reliable tissue anchorage is achieved, but the risk of tissue damage increases
Solution Approach 1:
The fixation tines are designed to be dynamically extendable and retractable rather than permanently fixed. During implantation, the tines extend to anchor the biostimulator to the tissue. For retrieval or repositioning, the tines can be retracted, providing dynamic control over tissue interaction and reducing permanent damage risk
Solution Approach 2:
The biostimulator is delivered to the target site using a transport system with catheter before the fixation tines are extended. This preliminary positioning allows precise placement at the correct location, ensuring that when the tines extend, they anchor to the intended tissue rather than surrounding structures, reducing harmful damage
3Manufacturing precision
If a transport system is used for precise positioning, then implantation accuracy is improved, but the procedure complexity increases
Solution Approach 1:
The transport system serves multiple functions: it delivers the biostimulator to the target site, positions it accurately, and can also be used for retrieval. The same catheter-based delivery system that provides precise positioning during implantation can be reused for device retrieval, reducing overall procedural complexity despite the initial complexity of the positioning system
Data Source
AI summary
An implantable biostimulator has fixation tines. A housing of the biostimulator has a longitudinal guide. A frame of the biostimulator movably engages the longitudinal guide. Fixation tines are at a distal end of the frame. Other embodiments are also described and claimed.