Left Atrial Appendage Twisting and Ablation for Secure Closure
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Solution Overview
Problem
Conventional LAA closure devices face issues such as complicated sizing algorithms, migration, leakage, fracture, and high recurrence of atrial fibrillation, along with difficulties in RF ablation due to the irregular shape and size of the LAA ostium, leading to potential thrombus formation and stroke risk.
Innovation Solution
A method involving twisting and ablating the LAA ostium using a treatment device with a contact member and securing element to constrict and electrically isolate the LAA, combined with radiofrequency or cryoablation to achieve effective closure and reduce stroke risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional LAA closure devices are used, then the LAA can be closed to reduce stroke risk, but the devices suffer from migration, leakage, and fracture leading to device-related complications
Solution Approach 1:
The treatment is divided into two independent stages: first deploying an occlusion device to close the LAA ostium, then separately performing ablation therapy. This segmentation allows each component to be optimized independently, reducing the risk of combined device-related complications while maintaining reliable LAA closure.
Solution Approach 2:
The occlusion device serves as an intermediary platform that enables subsequent ablation therapy. By providing a stable base with integrated ablation catheter access, the device mediates between mechanical closure and electrical isolation, reducing overall device-related complications through functional integration.
2Reliability
If RF ablation is performed on the LAA ostium, then electrical isolation can be achieved to reduce AF recurrence, but the irregular shape and size of the LAA ostium makes the procedure difficult and time-consuming
Solution Approach 1:
The LAA ostium is occluded first before ablation is performed. This preliminary action creates a controlled environment that simplifies subsequent ablation by defining clear boundaries and improving catheter contact, thereby reducing procedure time while maintaining effective electrical isolation.
Solution Approach 2:
The ablation catheter is designed to dynamically adapt to the irregular shape of the LAA ostium through flexible construction and adjustable positioning mechanisms. This allows the catheter to conform to varying anatomical geometries, maintaining effective electrical isolation without requiring excessive procedure time for positioning and shaping.
3Adaptability or versatility
If conventional LAA closure devices are used, then the LAA can be closed, but complicated sizing algorithms are required to determine the appropriate device size
Solution Approach 1:
The sizing process is segmented into standardized anatomical measurements that can be independently assessed. This breakdown simplifies the overall sizing algorithm by dividing complex three-dimensional measurements into manageable components, improving device size selection while reducing algorithmic complexity.
Solution Approach 2:
The sizing algorithm uses changeable parameters that can be adjusted based on patient-specific anatomy. By incorporating flexible sizing parameters rather than fixed dimensions, the system adapts to varying LAA geometries without requiring overly complex calculation algorithms, thus improving versatility while managing complexity.
4Reliability
If conventional LAA closure devices are used, then the LAA can be closed, but migration and leakage occur compromising the closure effectiveness
Solution Approach 1:
The occlusion device and ablation catheter are merged into an integrated system where the ablation catheter is positioned through the occlusion device. This merging provides mutual stabilization, preventing device migration and ensuring closure effectiveness while enabling simultaneous mechanical and electrical treatment.
Solution Approach 2:
The integrated system incorporates feedback mechanisms where the ablation catheter position provides real-time information about occlusion device stability. This feedback allows for immediate adjustment and confirmation of proper positioning, preventing migration and leakage while maintaining closure effectiveness.
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 method effectively reduces the risk of thrombus formation and recurrence of atrial fibrillation by securely closing the LAA, minimizing device-related complications and simplifying the procedure.
Implementation Method 1
twisting at least a portion of a tissue of a heart to constrict an ostium of the left atrial appendage
Implementation Method 2
ablating at least a portion of the left atrial appendage, at least a portion of the ostium of the left atrial appendage, and/or at least a portion of a tissue adjacent to the ostium of the left atrial appendage
Implementation Method 3
ablating at least a portion of the left atrial appendage, at least a portion of the ostium of the left atrial appendage, and/or at least a portion of a tissue adjacent to the ostium of the left atrial appendage
Data Source
AI summary
A method of treating a tissue of the heart, for example and without limitation, a tissue of the left atrial appendage, includes twisting at least a portion of a tissue of the left atrial appendage to constrict an ostium of the left atrial appendage, and ablating at least a portion of the tissue of the heart, which can include a tissue of the left atrial appendage, the ostium of the left atrial appendage, and/or at least a portion of a tissue adjacent to the ostium of the left atrial appendage.