Bioresorbable Vascular Implant with Segmented Wall and Radial Arms
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Solution Overview
Problem
Existing vascular implants do not effectively address the need for a bioresorbable solution that can be fully absorbed into vascular tissue after performing their function, leaving no residual material behind.
Innovation Solution
A vascular implant with a tubular body made of a polymeric material, featuring a segmented side wall with multiple wall panels and filtering elements connected to a hub, which allows for compression and reduced material resorption, and includes anchors to prevent migration and tilting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the implant is made entirely of bioresorbable material to be fully absorbed into vascular tissue, then residual material is eliminated, but the structural strength and mechanical integrity during the functional period may be compromised
Solution Approach 1:
The implant uses a composite structure combining a bioresorbable polymer matrix with embedded non-bioresorbable reinforcement elements (such as metallic or high-strength polymer fibers). This composite approach allows the implant to achieve the required mechanical strength and radial force during its functional period while ensuring complete resorption of the polymer component, leaving only minimal non-toxic reinforcement remnants that maintain vascular patency without causing long-term foreign body reactions.
2Reliability
If the implant structure is designed with complex filtering elements and anchors to prevent migration and trap emboli effectively, then filtering performance is improved, but the amount of material requiring resorption increases
Solution Approach 1:
The implant is divided into distinct functional segments: a central filtering element with radial arms for emboli capture, circumferential anchors for migration prevention, and a tubular body for structural support. Each segment is optimized independently with bioresorbable material distributed only where needed for temporary support, allowing effective filtering and anchoring functions while minimizing the total volume of material that requires resorption. The segmented design enables selective resorption of non-critical components while maintaining functional integrity.
3Loss of substance
If the implant uses a tubular body with segmented side wall and filtering elements to reduce material resorption, then the amount of material to be resorbed is reduced, but the manufacturing complexity increases
Solution Approach 1:
The implant employs a thin-walled tubular structure with segmented panels formed from a single bioresorbable polymer sheet or tube that is radially expanded during deployment. The segmented side wall configuration is achieved through strategic placement of radial seams or hinges that allow the tube to expand from a compressed delivery profile to its functional expanded state. This thin-film approach minimizes material usage and resorption requirements while the seamless monolithic construction simplifies manufacturing compared to assembling multiple discrete components.
Data Source
AI summary
A vascular implant including a tubular body of a polymeric material. The body has opposed filter body ends and a longitudinal axis. The body has a generally tubular segmented side wall that includes multiple spaced apart wall panels surrounding a central open-ended bore. The body includes one or more filtering elements in the bore and in between filter ends. One or more filtering elements including a hub at the central longitudinal axis and multiple radially extending filtering arms extend radially between the hub and wall, wherein each arm connects to a wall panel. The tubular body end has anchors that prevent migration and/or tilting.