Endovascular Fixation Rings With Self-Flaring Crowns for Secure Anchoring
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Solution Overview
Problem
Existing endovascular fixation devices for creating fistulas or anastomoses face challenges with complex deployment, risk of detachment, and increased surgical time, particularly in critical situations like organ transplants and emergencies.
Innovation Solution
An endovascular fixation device with radially expandable rings and connectors that flare outward upon deployment, facilitating easy insertion and anchoring without additional manipulation, reducing manufacturing complexity and surgical time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional endovascular fixation devices are used to create fistulas or anastomoses, then the procedure can be performed endovascularly, but the deployment process becomes complex and time-consuming with increased risk of detachment
Solution Approach 1:
The fixation device incorporates dynamic flaring elements that automatically transition from a compressed state during delivery to an expanded flared state upon deployment. This dynamic transformation simplifies the deployment process while enhancing attachment security through the flared configuration that engages with the vessel wall.
Solution Approach 2:
The device is designed to self-flare upon deployment without requiring additional manipulation or complex deployment steps. The flaring action occurs automatically as part of the deployment process, reducing procedural complexity and time while ensuring reliable attachment.
2Reliability
If conventional fixation devices require additional manipulation for deployment, then the anchoring can be secured, but the surgical time increases significantly
Solution Approach 1:
The flaring elements are pre-configured in a compressed state within the delivery system, ready to automatically flare upon deployment. This preliminary preparation eliminates the need for additional manipulation steps during surgery, reducing surgical time while maintaining fixation stability through the automatic flaring action.
Solution Approach 2:
The device performs the flaring action automatically during deployment without requiring additional surgical manipulation. This self-flaring mechanism reduces surgical time while ensuring stable fixation through the automated engagement of flared elements with the vessel wall.
3Ease of manufacture
If simple fixation structures are used, then the manufacturing complexity is reduced, but the anchoring capability and resistance to detachment are insufficient
Solution Approach 1:
The fixation structure uses simple geometries that are easy to manufacture, combined with dynamic flaring action that generates anchoring strength during deployment. The simplicity of the base structure facilitates easy manufacturing while the dynamic flaring provides the necessary anchoring capability when deployed.
Solution Approach 2:
The device maintains simple manufacturing geometries while achieving enhanced anchoring strength through parameter changes during deployment. The flaring action changes the geometric parameters of the fixation elements, transforming them from simple compressed forms to expanded flared configurations that provide superior anchoring strength.
Data Source
AI summary
An endovascular fixation device includes a first portion and a second portion connected to the first portion to define a central lumen extending longitudinally through the portions. The first portion includes a first radially expandable ring and at least one first connector, connected to the first ring, configured to cause at least one first flarable crown of the first ring to flare radially outwardly relative to other portions of the first ring when the first ring is expanded from a retracted position to an expanded position. The second portion includes a second radially expandable ring and at least one second connector, connected to the second ring, configured to cause at least one second flarable crown of the second ring to flare radially outwardly relative to other portions of the second ring when the second ring is expanded from a retracted position to an expanded position.