Vena Cava Filter Catcher Ring for Stable Blood Flow Positioning
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Solution Overview
Problem
Existing catchers for vena cava filters are prone to deformation under blood flow, making them difficult to locate accurately and prolonging the withdrawal process, thereby increasing surgical risk.
Innovation Solution
A catcher with a ring structure supported by multiple connecting rods, featuring catching subrings and a soft section that deforms easily under high force, along with a clamping mechanism to prevent detachment, ensuring stability and accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a catching loop is used for withdrawing the vena cava filter, then the device can be inserted into the body, but the catching loop is relatively soft during clinical use and would be easy to deform under blood flow, making it difficult to locate and prolonging the withdrawal time
Solution Approach 1:
The catching loop is divided into multiple catching subrings (first, second, third, and fourth subrings) that are connected to form a complete ring. Each subring is supported by connecting rods, creating a segmented structure that maintains stability while allowing controlled flexibility for navigation through the vascular system.
Solution Approach 2:
The catcher incorporates a soft section in the operating rod that allows controlled deformation under blood flow forces, enabling the device to adapt to vascular movements while maintaining overall structural stability for accurate positioning and timely withdrawal.
2Ease of operation
If the catching loop is made softer to facilitate insertion, then the device can navigate the vascular system more easily, but it becomes even more prone to deformation under blood flow
Solution Approach 1:
The catching loop is segmented into multiple subrings connected by connecting rods, allowing each segment to flex independently during insertion while maintaining overall ring stability when deployed, thus facilitating navigation without sacrificing structural integrity.
Solution Approach 2:
Different portions of the catcher have different flexibility characteristics - the soft section in the operating rod provides local flexibility for navigation, while the connecting rods and subring structures provide local rigidity to maintain overall stability during positioning and withdrawal.
Data Source
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AI summary
Disclosed is a catcher (100), comprising an catching ring (11) and at least one connecting rod (15), wherein both ends of the connecting rod (15) are connected to the catching ring (11), and the connecting line between the two ends of the connecting rod (15) is located within the catching ring (11). Compared with catching loops in the prior art, the catching ring (11) of the catcher (100) is a ring structure supported by the connecting rod (15), thereby having a relatively high stability and not easily being deformed under erosion by a blood flow, so as to facilitate accurate positioning by a doctor during clinical operations and improve the success rate of withdrawal.