Introducer Sheath Embolic Implant Deployment Mechanism
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Solution Overview
Problem
Existing mechanical implant deployment systems for intravascular devices, such as embolic coils, often require complex moving parts and auxiliary components, increasing procedural complexity and costs.
Innovation Solution
The use of an introducer sheath that is slid proximally to engage an interference feature attached to a pull wire, facilitating the deployment of embolic implants by moving the interference feature and pull wire proximally, allowing for simplified mechanical deployment without auxiliary components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex moving parts and auxiliary components are used in mechanical implant deployment systems, then the deployment function is achieved, but procedural complexity and costs increase
Solution Approach 1:
The patent combines the deployment function directly into the introducer sheath by integrating a pull wire mechanism, eliminating the need for separate deployment apparatuses with complex moving parts. The introducer sheath itself becomes the deployment device, merging protection and deployment functions into a single component.
Solution Approach 2:
The patent extracts the deployment function from separate auxiliary components and integrates it directly into the introducer sheath. By removing the need for external deployment apparatuses and their moving parts, the system achieves deployment capability while reducing overall device complexity.
2Ease of operation
If separate deployment apparatuses with moving parts are used, then implant deployment is achieved, but device complexity and cost increase
Solution Approach 1:
The deployment capability is merged into the introducer sheath structure itself through an integrated pull wire mechanism. This eliminates the need for separate deployment apparatuses, reducing device complexity while maintaining ease of operation through a simplified single-component system.
3Reliability
If auxiliary components are used for implant deployment, then deployment function is achieved, but costs increase
Solution Approach 1:
The patent extracts the deployment function from separate auxiliary components and integrates it into the introducer sheath. This eliminates the need for manufacturing additional deployment apparatuses, reducing overall system costs while maintaining reliable deployment function.
Solution Approach 2:
By merging the deployment function into the introducer sheath, the patent reduces the total number of components that need to be manufactured and assembled. This integration approach lowers manufacturing costs while ensuring reliable implant deployment through the combined structure.
Data Source
Figure 1~2B
Figure 3A~3C
Figure 4A~5B
AI summary
An aneurysm treatment system (100) that includes an embolic implant (140), a delivery system, and an introducer sheath (180) that are collectively designed so that the combination of the introducer sheath (180) and the delivery system can be used as a deployment apparatus for the embolic implant (140). The delivery system can have a pull wire (130), a delivery tube (110), and an interference feature (120) attached to the pull wire (130) and positioned near a proximal end of the delivery tube (110). Rather than being discarded, the introducer sheath (180) can be moved proximally over the delivery tube (110) until it engages the interference feature (120). To deploy the implant (140), the introducer sheath (180) can be pressed against the interference feature (120), causing the interference feature (120) to move proximally in relation to the delivery tube (110), thereby proximally pulling the pull wire (130) to which the interference feature (120) is attached and deploying the implant (140).