Articulating IVC Filter Retrieval Device for Embedded Struts
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing IVC filter retrieval devices face challenges in removing filters that have become lodged in the vessel wall due to fibrosis, tilted positions, or embedded in adjacent structures, making snare-based retrieval difficult or impossible, and often result in complications such as filter migration, fracture, and penetration.
Innovation Solution
A medical device with a grasping assembly that articulates laterally to access and secure IVC filters in any orientation, combined with a dissecting sheath that can cut and rotate to release filters from fibrotic tissue without excessive penetration, allowing for controlled retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional snare-based retrieval methods are used, then simple IVC filter removal is achieved, but retrieval becomes difficult or impossible when filters are tilted or embedded in fibrotic tissue
Solution Approach 1:
The retrieval device incorporates an articulating mechanism that allows the grasper to move dynamically between straight and angled positions. This dynamic capability enables the device to adapt to tilted filters and embedded struts, resolving the contradiction between reliable retrieval and adaptability to difficult positions
Solution Approach 2:
The device is divided into distinct functional segments: a straight shaft for access, an articulating section for angular adjustment, and a grasper for filter engagement. This segmentation allows each component to perform its specific function optimally while working together to solve the retrieval challenge
2Productivity
If force is applied to pull embedded filters, then retrieval may be achieved, but filter migration, fracture, or vessel wall penetration occurs
Solution Approach 1:
The device performs preliminary dissection of fibrotic tissue around embedded struts before filter retrieval. The dissecting element separates adhesions and frees struts in advance, allowing subsequent retrieval without excessive force, thus preventing complications while maintaining efficiency
Solution Approach 2:
The articulating mechanism serves as an intermediary between the operator and the embedded filter. It provides mechanical advantage and controlled force application through angular adjustment, mediating the interaction to achieve retrieval without harmful forceful extraction
3Adaptability or versatility
If unconventional tools like rigid bronchoscopy forceps or laser sheath are used, then difficult filter retrieval may be achieved, but safety and effectiveness are not established as they were not designed for IVC filter retrieval
Solution Approach 1:
The device combines multiple functions in one integrated system: navigation through vessels, articulation to reach tilted filters, grasping of filter struts, and dissection of fibrotic tissue. This multi-functionality provides the adaptability of unconventional tools while maintaining the safety and effectiveness of a purpose-designed medical device
Data Source
AI summary
A medical device for retrieving an inferior vena cava filter from an inferior vena cava having a handle having a distal end, wherein a longitudinal axis is defined thereby; a grasping assembly coupled to the handle, wherein the grasping assembly comprises a grasper for grasping the inferior vena cava filter positioned within the inferior vena cava, and an articulation assembly coupled to the grasping assembly for causing the grasping assembly to move laterally with respect to the longitudinal axis of the handle. Methods of retrieving an inferior vena cava filter from an inferior vena cava are also disclosed.