Leadless Pacing Device Fixation and Infection Control
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Solution Overview
Problem
There is a need for alternative medical devices and delivery systems for cardiac pacing that offer improved design, materials, manufacturing methods, and usage alternatives compared to existing technologies.
Innovation Solution
The development of leadless pacing devices with innovative designs, including a housing with a central longitudinal axis, a fixation member, and a distal extension, which can be used to deliver electrical stimulation to the heart without the need for external leads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pacing devices with external leads are used, then electrical stimulation can be delivered to the heart, but the device complexity and risk of infection increase
Solution Approach 1:
The patent removes the external lead component from the pacing system, extracting only the essential pacing function and placing it within a leadless device that is implanted directly in the heart chamber. This eliminates the external lead pathway that serves as a potential infection route while maintaining the electrical stimulation capability.
Solution Approach 2:
The patent combines the pulse generator, battery, and electrode functions into a single integrated leadless device unit that is implanted within the heart chamber. This merging of components eliminates the need for external leads and connection points, thereby reducing infection risk while maintaining full pacing functionality.
2Reliability
If leadless pacing devices are used, then infection risk is reduced, but the fixation and positioning capabilities may be compromised
Solution Approach 1:
The leadless device is segmented into distinct functional components including a fixation member (such as a helical anchor or expansion mechanism) separate from the pacing electrode and battery components. This segmentation allows the fixation member to be optimized specifically for stable anchoring in the heart chamber wall while the other components maintain their pacing functions.
Solution Approach 2:
The fixation member of the leadless device employs specialized local structures (such as helical threads, barbs, or expandable balloons) that are specifically designed to engage with the heart chamber wall tissue. This local quality enhancement provides robust fixation and positioning capabilities at the implantation site without compromising the overall leadless design that reduces infection risk.
Data Source
AI summary
A leadless pacing device may include a housing having a proximal end and a distal end, and one or more electrodes supported by the housing. The housing may include a body portion and a header. A distal extension may extend distally from the header of the housing, the distal extension including one or more electrodes. The header may include a guide wire port and a guide wire lumen may extend from the guide wire port through the header of the housing and through the distal extension. A fixation member may extend from the header of the housing. The header may be formed from an over mold process.