Leadless Pacemaker Atrial Anchoring Mechanism
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Solution Overview
Problem
Current implantable medical devices for pacing and sensing in the heart, particularly in the atria, face challenges due to the thinner walls and smaller volume of the atria, which differ from the ventricles, requiring specialized form factors and fixation mechanisms that are not adequately addressed by existing technologies.
Innovation Solution
The development of a leadless cardiac pacemaker (LCP) with an expandable anchoring member that transitions from a collapsed configuration for delivery to an expanded configuration for secure positioning within the atrium, featuring a housing with an anode and cathode electrode, and optionally including a mesh for endothelialization, allows for secure engagement with the atrial walls and appendages, enabling effective pacing and sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional pacemaker device is implanted in the ventricle, then reliable pacing and sensing is achieved, but the device cannot be effectively used in the atria due to thinner walls and smaller volume
Solution Approach 1:
The device incorporates an expandable anchoring member with struts that can be configured to engage with the specific anatomical structures of different heart chambers. The anchoring member expands to engage with atrial appendage or atrial wall, providing chamber-specific adaptation while maintaining reliable pacing and sensing through proper mechanical engagement.
2Stability of the object's composition
If the anchoring member is expanded to secure the device in the atrium, then stable positioning is achieved, but the device complexity increases
Solution Approach 1:
The anchoring member is divided into multiple struts that can independently engage with the atrial wall or appendage. This segmentation allows the complex anchoring function to be distributed across simpler structural elements, each contributing to overall stability without requiring a monolithic complex structure.
Solution Approach 2:
The anchoring member transitions from a compressed delivery configuration to an expanded deployed configuration. This dynamic transformation allows the device to be delivered through standard vascular access and then expanded to engage with the atrial structures, achieving stable positioning through a controlled structural change rather than a fixed complex design.
3Volume of moving object
If the device is designed with a compact form factor for atrial implantation, then ease of delivery is improved, but the housing volume for accommodating circuitry and power source is reduced
Solution Approach 1:
The device housing is designed with a compact form factor that can be nested within the expanded anchoring member during delivery. The anchoring member provides the larger structural envelope needed for engagement with atrial structures, while the housing remains compact for easy delivery through vascular access and contains the necessary circuitry and power source.
Data Source
AI summary
An implantable medical device (IMD) may be deployed within a patient's right atrium at a location near a right atrial appendage of the patient's heart in order to pace the patient's heart and/or to sense electrical activity within the patient's heart. In some cases, an IMD may be implanted within the right atrial appendage. The IMD may include an expandable anchoring mechanism configured to secure the IMD in place.