Leadless Pacemaker Loop Anchoring Bundle of His
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Solution Overview
Problem
Implantable leadless cardiac pacemakers face challenges in anchoring within the right atrium and delivering sufficient power for pacing the bundle of His, while also meeting size limitations and securing positioning.
Innovation Solution
A leadless cardiac pacemaker configured for atrial placement with a loop structure that converts between collapsed and expanded configurations, featuring a rechargeable power supply and energy-receiving antenna for secure anchoring via the tricuspid valve annulus, and including fixation elements and surface treatments for endothelialization, supports pacing the bundle of His with sufficient energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a leadless cardiac pacemaker is implanted in the right atrium to pace the bundle of His, then pacing therapy can be delivered to the ventricles, but the device faces challenges in anchoring securely and delivering sufficient power
Solution Approach 1:
The loop structure is divided into multiple segments or sections that can independently engage with the tricuspid valve annulus. The loop includes fixation features distributed along its length, allowing progressive anchoring as the loop expands and conforms to the annular geometry, thereby securing the device without requiring a single complex anchoring point
Solution Approach 2:
The loop structure transitions from a collapsed one-dimensional configuration during delivery to a three-dimensional expanded configuration that conforms to the tricuspid valve annulus. This dimensional transformation allows the loop to utilize the annular space for anchoring, providing secure fixation while maintaining a compact delivery profile
2Duration of action of moving object
If the pacemaker uses a rechargeable power supply with energy-receiving antenna, then power can be replenished after implantation, but the device size increases
Solution Approach 1:
The loop structure serves multiple functions: it provides structural support for the device, enables anchoring to the tricuspid valve annulus, and acts as an energy-receiving antenna for inductive power transfer. By combining these functions into a single component, the design avoids adding separate elements that would increase device volume, while still providing rechargeable power capability
Solution Approach 2:
The energy-receiving antenna is integrated with the loop structure rather than being a separate component. This merging of the antenna function into the existing loop reduces the overall device volume while maintaining the rechargeable power supply capability, allowing extended operation without proportionally increasing device size
3Reliability
If the loop structure is configured to fit within the atrium and expand to anchor at the tricuspid valve, then secure positioning is achieved, but the delivery complexity increases
Solution Approach 1:
The loop structure is designed to be dynamic, transitioning from a compressed delivery configuration to an expanded anchored configuration. This dynamic transformation allows the loop to navigate through the delivery catheter in a compact form and then expand to its functional shape for anchoring, simplifying the delivery procedure while maintaining positioning accuracy
Solution Approach 2:
The loop structure is pre-formed or pre-shaped to naturally expand into the correct configuration for anchoring at the tricuspid valve annulus. This preliminary preparation of the loop's geometry ensures that upon deployment, it automatically assumes the position-needed for secure anchoring, reducing the complexity of the delivery procedure while achieving reliable positioning
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 solution enables secure anchoring and efficient pacing of the bundle of His with sufficient power, addressing the challenges of size constraints and anchoring within the right atrium, while promoting endothelialization for long-term stability.
Implementation Method 1
The loop structure is configured as a loop antenna having two or more windings for receiving transmitted energy
Implementation Method 2
the support structure includes a shape memory alloy
Data Source
AI summary
A leadless cardiac pacemaker (LCP) that is configured for atrial placement may include a housing, two or more electrodes and a controller that is disposed within the housing and that is operably coupled to the two or more electrodes. The controller may be configured to sense activation of the atrium of the patient's heart via two or more of the electrodes and to deliver pacing therapy via two or more of the electrodes to a ventricle of the patient's heart by pacing the bundle of His in the patient's atrioventricular septum.