Occlusive Device With Braided Polymer And Shape Memory Wire
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Solution Overview
Problem
Current occlusive implants for vascular occlusion in the human body may face challenges in delivering effective and durable occlusions, particularly in smaller vessels or aneurysms, due to high surface friction and limited flexibility, which can hinder deployment and lead to incomplete or unstable blockages.
Innovation Solution
The development of an occlusive device featuring an elongate polymer body with a braided or knitted fiber structure coupled with a shape memory wire, secured by bands or clamps, which reduces surface friction and enhances flexibility, allowing for improved deployment and thrombosis induction, and a delivery system with a pusher member and tubular member for precise placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional occlusive implants are used, then occlusion function is provided, but surface friction is high and flexibility is limited, hindering deployment in smaller vessels
Solution Approach 1:
The occlusive implant incorporates a flexible braid structure comprising multiple strands that can flex and conform to the vessel geometry. This braid construction provides the necessary flexibility for navigation through smaller vessels while maintaining occlusion effectiveness upon deployment.
Solution Approach 2:
The implant combines different materials with complementary properties: the braid provides flexibility and conformability, while the thrombogenic coating or integrated thrombus-promoting features enhance occlusion. This composite approach balances flexibility during delivery with effective occlusion after deployment.
2Reliability
If traditional occlusive implants are used, then occlusion is achieved, but implant conformability is limited, leading to incomplete blockages
Solution Approach 1:
The flexible braid structure allows the implant to conform to the irregular geometry of aneurysms and smaller vessels. The multiple strands can adapt to curved and complex vessel paths, ensuring complete contact and effective occlusion throughout the target region.
Solution Approach 2:
The implant transitions from a constrained state during delivery to an expanded conformable state after deployment. The braid structure dynamically adapts to the vessel geometry, allowing the implant to mold itself to the target site for optimal occlusion effectiveness.
3Productivity
If traditional delivery systems are used, then implant delivery is possible, but procedure time is extended and radiation exposure increases
Solution Approach 1:
The implant is pre-formed with the braid structure and thrombogenic features integrated before delivery. This preliminary preparation eliminates the need for complex assembly steps during the procedure, reducing procedure time and radiation exposure while maintaining occlusion effectiveness.
Solution Approach 2:
The delivery system is designed to accommodate the flexible braid implant with a straightforward pusher-based mechanism. The universal design allows for simple deployment without requiring multiple specialized tools or complex manipulation steps, improving procedural efficiency.
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 efficient and durable vascular occlusion with reduced procedure time and radiation exposure, facilitating effective thrombus formation and occlusion in smaller vessels and aneurysms by minimizing surface friction and maximizing implant conformability.
Implementation Method 1
a shape memory wire coupled with the polymer body. The shape memory wire can be secured to the elongate polymer body and can have an instilled shape
Data Source
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AI summary
Disclosed are example embodiments of methods and systems for delivering a medical implant. One of the systems includes an occlusive device with a braided elongate polymer body and a shape memory wire coupled with the polymer body. Various configurations for the occlusive device are disclosed. Also disclosed is a transfer tool for use with various delivery systems.