Distal Stabilizer Filtration Structure for Embolization Control
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Solution Overview
Problem
The operation of delivering a treatment catheter to a target location in a biological lumen can cause scattering of foreign matter such as thrombi or plaque, leading to embolization on the distal side.
Innovation Solution
A distal stabilizer with a self-expansion member featuring a cylindrical main body and filter portions composed of wire-shaped members that protrude radially, capturing and collecting foreign matter to prevent its scattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a locking stent is expanded and anchored to the inner wall in the biological lumen, then the operation of delivering the treatment catheter can be easily performed, but foreign matter such as thrombus or fragments may scatter on the distal side causing embolization
Solution Approach 1:
The locking stent is divided into distinct functional segments: a main body portion for anchoring and a filter portion with wire-shaped members protruding radially to intercept and contain foreign matter. This segmentation allows the device to simultaneously provide easy catheter delivery through anchoring while preventing embolization through foreign matter containment.
Solution Approach 2:
The filter portion acts as an intermediary structure between the locked stent and the biological lumen. The wire-shaped members protruding from the outer circumferential side toward the center side create a filtering barrier that intercepts foreign matter before it can scatter distally, while still allowing the stent to fulfill its anchoring function.
2Object-affected harmful factors
If wire-shaped members protrude radially from the outer circumferential side toward the center side, then foreign matter can be captured and scattering suppressed, but the structural complexity of the main body portion increases
Solution Approach 1:
The wire-shaped members serve multiple functions simultaneously: they provide structural support for the main body portion, create the filtering barrier for foreign matter interception, and maintain the radial geometry needed for both anchoring and filtration. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The filter portion is nested within the main body portion of the locking stent. The wire-shaped members are positioned within the radial space of the stent structure, with their ends coupled together to form a contained filtering network that does not require external additional structures.
Data Source
AI summary
Provided is a distal stabilizer that can mitigate the scattering of foreign matter from a locking stent to the distal side. A distal stabilizer 1 is used for catheter delivery in a body lumen, and includes: a linear delivery member 3; and a self-expanding member 2 that is linked to the distal end of the linear delivery member 3, and that has a cylindrical body section 11 locked inside the body lumen. The body section 11 includes a filter unit 17 constituted of a wire member 14 that protrudes towards the center in a radial direction RD from the circumferential side.