Artificial Blood Stent Insertion Device Fixing Wire Mechanism
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Solution Overview
Problem
Conventional artificial blood stent insertion devices face challenges in accurately placing the stent due to blood pressure resistance, requiring antihypertensive agents and complex knotting procedures, which increase treatment costs and risks.
Innovation Solution
An artificial blood stent insertion device with a fixing wire having ring-shaped loops at both sides, tied by a core that passes through the loops, allowing the stent to remain contracted until positioned, simplifying placement and eliminating the need for knotting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the artificial blood stent is released from the insertion device in a high blood pressure condition, then the stent quickly returns to its expanded shape, but the stent is pushed down the blood vessel by blood flow resistance, making accurate placement difficult
Solution Approach 1:
The patent applies preliminary action by pre-tying the stent at multiple points (front end, middle, and rear end) with a fixing wire before insertion. This preliminary constraining action ensures that when the stent is released in the blood vessel, the tying points prevent immediate expansion and displacement by blood flow, allowing accurate placement at the desired position before the stent is fully deployed.
2Ease of operation
If conventional insertion devices are used without additional fixing mechanisms, then the device structure is simple, but complex knotting procedures are required to secure the stent, increasing operational complexity
Solution Approach 1:
The patent applies segmentation by dividing the stent into multiple sections (front end portion, middle portion, and rear end portion) and tying each section separately with a continuous fixing wire. This segmentation allows each portion to be independently secured, preventing the need for complex knotting procedures while maintaining simplicity in the overall fixing mechanism. The stent is tied at multiple discrete points rather than requiring complex overall securing.
3Reliability
If the stent is tied at only one point, then the fixing procedure is simple, but the stent cannot be securely maintained in a contracted state, requiring additional tying points and increasing procedure complexity
Solution Approach 1:
The patent applies merging by using a single fixing wire to tie the stent at multiple points (front end, middle, and rear end) in one continuous procedure. This combines the securing of multiple stent portions into a unified fixing process, maintaining reliability by securing the entire stent at three points while avoiding the need for separate complex procedures for each tying point. The fixing wire is inserted through loops at different positions and secured in a integrated manner.
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
Enables easy and precise placement of the stent without blood pressure interference and simplifies the operation by maintaining the stent in a contracted state until positioned, reducing the need for antihypertensive agents and minimizing operational complexity.
Implementation Method 1
an artificial blood stent using a superelastic shape memory alloy wire
Implementation Method 2
an artificial blood stent using a superelastic shape memory alloy wire
Data Source
AI summary
An artificial blood stent insertion device which includes a blood stent having a front end portion, a middle portion and a rear end portion compressed by a fixing wire having ring-shaped loops disposed at the sides thereof, and a core passing through the loops and extending through the moving tube so that one end thereof is accessible, whereby the artificial blood stent can be easily inserted and fixed to a desired position in a blood vessel without affecting blood pressure, and then the artificial blood stent is expanded by disengaging the core from the loops of the fixing wire.