Leadless Pacing Sensing Extension for Multi-Chamber Cardiac Detection
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Solution Overview
Problem
Existing cardiac pacing systems with leads can cause complications due to lead migration and mechanical irritation, and there is a need for improved sensing capabilities beyond the chamber where the pacemaker is implanted.
Innovation Solution
A leadless pacing system with a sensing extension that includes a self-supporting body and electrodes to sense electrical activity in another heart chamber, minimizing mechanical interference and allowing for improved sensing capabilities without leads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If leadless pacing device is implanted within a chamber of the heart, then lead-related complications are eliminated, but sensing capability in other chambers is limited
Solution Approach 1:
The pacing system is segmented into two functional parts: the leadless pacing device implanted in one chamber and the sensing extension that can reach into other chambers. This segmentation allows the device to eliminate leads while still providing multi-chamber sensing capability through the separate sensing extension component.
Solution Approach 2:
The sensing extension acts as an intermediary element that bridges the gap between the leadless pacing device and other heart chambers. It provides the necessary reach and positioning capability to sense electrical activity in chambers distant from the implanted pacemaker without requiring traditional leads.
2Adaptability or versatility
If sensing extension is extended to reach other chambers, then sensing capability is improved, but mechanical interference with heart movement increases
Solution Approach 1:
The sensing extension employs a flexible, thin-walled structure that can conform to the heart's movement and deformation. This flexibility minimizes mechanical interference with normal heart function while maintaining the ability to reach and sense electrical activity in other chambers.
Solution Approach 2:
The sensing extension is designed with dynamic characteristics that allow it to move and adapt with the heart's rhythmic contractions. Its proximal portion can deform and flex to accommodate valve movement and chamber expansion, reducing mechanical interference while maintaining sensing capability.
3Device complexity
If self-supporting body is used to position electrodes, then device complexity is reduced, but control during implantation becomes more difficult
Solution Approach 1:
The self-supporting body is pre-configured with a specific geometry and structural characteristics that enable it to assume a desired position within the heart chamber. This preliminary structural design facilitates passive positioning while reducing the need for complex active control mechanisms during implantation.
Solution Approach 2:
The sensing extension's self-supporting body is designed to self-position and self-stabilize within the heart chamber using its inherent structural properties. It can autonomously navigate to and maintain the correct position without requiring external manipulation or complex control systems, simplifying both the device structure and implantation procedure.
Data Source
AI summary
A leadless pacing system includes a leadless pacing device and a sensing extension extending from a housing of the leadless pacing device. The sensing extension includes one or more electrodes with which the leadless pacing device may sense electrical cardiac activity. The one or more electrodes of the sensing extension may be carried by a self-supporting body that is configured to passively position the one or more electrodes proximate or within a chamber of the heart other than the chamber in which the LPD is implanted.