Leadless Pacemaker Tissue Engagement Verification
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Solution Overview
Problem
The challenge in implanting leadless cardiac pacemakers is securing them to intracardiac tissue effectively, as conventional methods lack verification of sufficient engagement of the fixation mechanism, which can lead to instability and inefficiency in cardiac pacing.
Innovation Solution
Incorporating a tissue engagement verification feature, such as radiopaque markers and anchoring members, to provide visual feedback during implantation, ensuring secure anchoring of the pacemaker to cardiac tissue through fluoroscopic observation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fixation mechanisms are used to secure the leadless pacemaker to cardiac tissue, then the device can be implanted, but verification of sufficient engagement is lacking leading to potential instability
Solution Approach 1:
The patent incorporates visual feedback features (radiopaque markers, movable indicators) that provide real-time information during implantation to confirm adequate tissue engagement of the fixation mechanism, allowing physicians to verify secure anchoring without adding complex verification systems
Solution Approach 2:
The patent replaces complex mechanical verification systems with visual/optical indicators that can be observed during fluoroscopy, substituting mechanical complexity with optical simplicity while maintaining engagement verification capability
2Stability of the object's composition
If no engagement verification is provided, then the device structure remains simple, but the stability and effectiveness of cardiac pacing is compromised
Solution Approach 1:
The patent employs radiopaque markers and visual indicators that change position or appearance during implantation to signal engagement status, using visual contrast changes rather than complex mechanical or electronic verification systems to ensure device stability
3Measurement precision
If radiopaque markers are added to provide visual feedback, then engagement verification is improved, but the device complexity increases
Solution Approach 1:
The patent uses radiopaque markers as intermediary visual elements that translate the mechanical engagement state into observable signals during fluoroscopy, enabling precise engagement detection without requiring complex sensing or measurement systems within the device itself
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The verification feature ensures secure anchoring of the leadless cardiac pacemaker, enhancing the reliability and effectiveness of the implantation process by confirming tissue engagement, thereby stabilizing the device's position and ensuring proper cardiac pacing.
Implementation Method 1
a radiopaque marker movable relative to the housing and a radiopaque reference point stationary relative to the housing. Displacement of the radiopaque marker relative to the radiopaque reference point provides visual feedback of engagement of the tissue anchoring member in cardiac tissue
Data Source
AI summary
An implantable leadless cardiac pacing device including a housing having a proximal end and a distal end, an electrode positioned proximate the distal end of the housing configured to be positioned adjacent cardiac tissue, and a tissue anchoring member extending from the distal end of the housing configured to secure the housing to cardiac tissue. The device further includes a tissue engagement verification feature configured to provide feedback upon engagement of the tissue anchoring member in cardiac tissue.