Leadless Pacing Device Coronary Sinus Leadlet Fixation
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Solution Overview
Problem
Current implantable medical systems for cardiac pacing and therapy delivery often require invasive procedures and may not effectively position electrodes within the coronary sinus or other heart chambers for optimal left ventricular and atrial therapy.
Innovation Solution
A medical system comprising an implantable device with leadlets that extend into the coronary sinus and penetrate heart tissue, allowing for the secure positioning of electrodes for left ventricular and atrial therapy, including a fixation device to anchor the device to heart tissue and enable independent electrical stimulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional implantable medical systems use leads to position electrodes in the coronary sinus, then electrode positioning capability is improved, but procedural invasiveness increases
Solution Approach 1:
The patent combines the pacemaker device with integrated leadlets into a single implantable unit. The leadlets are pre-attached to the pacemaker housing and can be deployed simultaneously with the device implantation, eliminating the need for separate lead implantation procedures. This merging reduces procedural invasiveness while maintaining electrode positioning capability in the coronary sinus and other heart chambers.
Solution Approach 2:
The pacemaker device is designed with multiple functional components: the main device body for atrial sensing and pacing, and integrated leadlets that can be selectively deployed to various heart chambers including the coronary sinus. This multi-functional design allows a single device to perform both traditional pacemaker functions and advanced therapies without requiring multiple separate implantation procedures.
2Adaptability or versatility
If multiple separate devices are implanted to achieve multi-chamber functionality, then therapy delivery capability is improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple functional components into a single pacemaker device: the main device body for atrial functionality and multiple leadlets (first leadlet for coronary sinus, second leadlet for ventricular penetration) all attached to one device. This consolidation reduces the number of separate implantable devices from multiple to one, while maintaining multi-chamber therapy delivery capability.
Solution Approach 2:
The device is segmented into functional modules: a main housing containing the pacemaker circuitry and atrial electrode, and separate detachable leadlets that can be independently deployed to different heart chambers. This segmentation allows flexible configuration for different therapy needs while keeping the overall system complexity manageable through modular design.
3Ease of operation
If leadlets are made flexible for easy deployment, then ease of operation is improved, but structural stability deteriorates
Solution Approach 1:
The leadlets are constructed using flexible materials and thin-film structures that enable easy deployment through catheters and into heart chambers. The flexibility allows the leadlets to navigate complex anatomical pathways during implantation while maintaining integrity.
Solution Approach 2:
The leadlets incorporate dynamic characteristics with varying stiffness along their length - more flexible at the proximal end for easy manipulation and deployment, and progressively stiffer toward the distal end to provide structural stability when positioned in the coronary sinus or penetrating heart tissue. This gradient stiffness design balances deployability with structural integrity.
Data Source
AI summary
A medical system includes an implantable medical device configured to be positioned within an atrium of a heart. The implantable medical device includes a housing carrying a return electrode, a first leadlet, a second leadlet, and a fixation device. The medical system may be configured to deliver a variety of therapies, including one or more of ventricle-from-atrium cardiac therapy (“VfA therapy”), left bundle branch pacing therapy (“LBB therapy”), or cardiac resynchronization therapy (“CRT”).