Left Atrial Appendage Occluder Delivery System with Independent Anchor Deployment
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Solution Overview
Problem
Current implantable devices for occluding the left atrial appendage are limited by variability in size and shape, and orientation challenges, leading to inadequate performance in modifying the left atrial appendage anatomy.
Innovation Solution
A medical device delivery system with a deployable occluder and anchor portion, controlled by an actuation assembly, allows independent deployment and repositioning within the left atrial appendage, facilitated by a delivery catheter and sheath system, enabling precise placement and stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional implantable device is used for occluding the left atrial appendage, then the device structure is simple, but the device cannot meet the variability in size and shape of different left atrial appendages
Solution Approach 1:
The device is divided into multiple segments including an expandable frame with multiple struts, an occluder portion, and an anchor portion. Each segment can be independently positioned and deployed to adapt to the specific anatomy of the left atrial appendage, allowing customization without requiring completely different devices for different anatomies.
Solution Approach 2:
The device incorporates dynamic elements such as an expandable frame that can transition from a compressed delivery state to an expanded deployed state. The frame includes movable struts that can be selectively extended or adjusted to match the varying dimensions and geometry of different left atrial appendages, providing adaptability through mechanical transformation rather than fixed structure.
2Adaptability or versatility
If the device is deployed with fixed orientation, then the deployment process is simple, but the device cannot address orientation challenges in different anatomical configurations
Solution Approach 1:
The device employs dynamic positioning mechanisms including an expandable frame with adjustable struts that can be oriented in different directions. The anchor portion can be deployed at various angles relative to the occluder portion, allowing the device to adapt to different orientations required by specific anatomical configurations while maintaining a relatively simple deployment sequence.
Solution Approach 2:
The device is segmented into independently controllable portions including the occluder and anchor, each capable of being positioned and oriented separately. This segmentation allows the operator to adjust the orientation of each segment to match the specific anatomical requirements without requiring complete redeployment of the entire device.
3Ease of operation
If the occluder and anchor portions are deployed simultaneously, then the deployment process is fast, but the device cannot allow independent repositioning of each portion
Solution Approach 1:
The device is divided into separately deployable segments including the occluder portion and the anchor portion, each controlled by independent deployment mechanisms. This allows the operator to deploy one segment, verify its position, and then deploy the next segment in sequence, enabling independent repositioning of each portion without requiring simultaneous deployment of all components.
Solution Approach 2:
The device allows preliminary deployment and positioning of the occluder portion first, followed by deployment of the anchor portion. This sequential approach enables the operator to establish the primary occlusion function before adding the anchoring function, allowing for verification and adjustment at each stage rather than requiring all adjustments to be made after simultaneous deployment.
Data Source
AI summary
Devices, methods and systems are provided for occluding an opening within the tissue of a body, such as a left atrial appendage. In one embodiment, a delivery system for use in occluding an opening in the tissue of a body includes an actuation assembly operatively coupled to a medical device including an anchor portion and an occluder portion. The actuation assembly is configured to move the anchor portion between a deployed state and retracted state while the occluder portion maintains a deployed state. With this arrangement, the deployed occluder portion can be visualized via imaging at a preferred position prior to deploying the anchor portion of the medical device.