Rotatable Clamping Wings Stent Delivery Friction Reduction
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Solution Overview
Problem
The difficulty in retrieving and adjusting the position of vascular stents during delivery due to high frictional resistance between the stent delivery component and the catheter, leading to laborious operations and reduced delivery efficiency.
Innovation Solution
A stent delivery component with rotatably connected clamping wings that form a prismatic enclosing section, reducing frictional resistance by maintaining a line contact with the catheter and allowing for easy expansion to accommodate the stent, manufactured from materials like polymers or metals to ensure compliance and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional stent delivery component with large contact surface is used, then the stent can be securely held, but the frictional resistance between the delivery component and catheter increases, making delivery laborious and difficult
Solution Approach 1:
The delivery component is segmented into multiple clamping wings (at least two) that are rotatably connected to a base, allowing the structure to be divided into movable segments that can independently adjust their position and contact area with the catheter
Solution Approach 2:
The clamping wings are designed to be rotatable rather than fixed, enabling the delivery component to dynamically adjust its configuration - transitioning from a closed state (for secure stent holding) to an expanded state (for reduced friction during delivery)
2Measurement precision
If the stent is firmly secured in the delivery component, then the stent can be delivered accurately, but the retrieval operation becomes very inconvenient when position adjustment is needed
Solution Approach 1:
The rotatable clamping wings enable the delivery component to transition between different states - securely enclosing the stent for accurate positioning and delivery, while allowing easy expansion for retrieval when needed
Solution Approach 2:
The clamping wings can change their geometric configuration by rotating, altering the enclosed space from a tight fit (for secure holding) to an expanded state (for easy retrieval and position adjustment)
3Force
If the contact surface between pushing component and catheter is large, then the pushing force is distributed, but the frictional force increases significantly, becoming the main resistance in stent delivery
Solution Approach 1:
The delivery component is divided into multiple clamping wings that can be independently positioned, allowing the contact surface with the catheter to be segmented into discrete points or lines rather than a large continuous area, thereby reducing total frictional resistance
Solution Approach 2:
The clamping wings are designed to contact the catheter primarily at edges or lines (lower dimensional contact) rather than broad surfaces, reducing the area of interaction and consequently the frictional force while maintaining structural integrity
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 effectively reduces operation difficulty and increases delivery efficiency by minimizing frictional resistance and facilitating the successful deployment and retrieval of stents.
Implementation Method 1
a contact surface between a pushing component and a catheter is large, resulting in large frictional force between the pushing component and the catheter
Implementation Method 2
the at least two clamping wings are rotatably connected with the base, respectively... the at least two clamping wings are separated from each other to make the enclosing section expanded when rotated
Data Source
AI summary
The present disclosure relates to a stent delivery component, a stent delivery system and a stent system. In particular, a stent delivery component including a base and at least two clamping wings which are rotatably connected with the base, respectively, is provided. In one aspect, the stent delivery component can effectively enclose the stent to complete delivery. In another aspect, the stent delivery component is kept in line contact with an inner wall of a delivery catheter to reduce the contact area, thereby reducing the frictional resistance and being beneficial to reduce the operation difficulty and increasing the delivery efficiency.