Traction-Wire Valve Delivery Device for Precise Bending
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Solution Overview
Problem
Current valve delivery systems suffer from low control precision in bending adjustment, which affects the stability and accuracy of artificial valve release due to angular deviations between the access path and the valve axis during implantation.
Innovation Solution
A valve delivery device with a bending adjustment tube, a withdrawing assembly, a traction wire, a bending adjustment wheel, and a stabilizing tube, where the traction wire adjusts the bending degree of the bending adjustment tube, and the stabilizing tube limits its bending position, enhancing precision by allowing eccentric arrangement and precise bending adaptation to physiological tube walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the valve delivery device uses a conventional bending adjustment mechanism, then the device can achieve basic bending capability, but the control precision of bending adjustment is low
Solution Approach 1:
The delivery device is divided into multiple functional segments: a stabilizing tube portion and a bending adjustment tube portion. The stabilizing tube provides rigid support to maintain positioning precision, while the bending adjustment tube enables flexible positioning. This segmentation allows each part to optimize its function without compromising the other, thereby improving bending control precision without requiring a completely complex redesign.
Solution Approach 2:
The patent introduces a wire rope as an intermediary element to transmit bending forces precisely from the operator to the delivery device. The wire rope mechanism provides fine-grained control over the bending adjustment, enabling high-precision positioning. This intermediary transmission mechanism improves control precision while maintaining relatively simple device structure.
2Measurement precision
If the withdrawing assembly and traction wire are arranged on the same axis, then the structure is simple, but the bending adjustment control precision is low
Solution Approach 1:
The patent deliberately employs asymmetric arrangement where the withdrawing assembly and traction wire are positioned at different locations rather than on the same axis. This asymmetric configuration creates a mechanical advantage that amplifies the bending control precision. The offset arrangement allows the traction wire to exert more effective leverage on the delivery device during bending adjustment, improving precision while adding only moderate structural complexity.
3Adaptability or versatility
If the bending adjustment tube is made more flexible to adapt to curved paths, then the adaptability to physiological tube walls improves, but the control precision of bending adjustment decreases
Solution Approach 1:
The delivery device is divided into a stabilizing tube portion with high rigidity for precise control and a bending adjustment tube portion with appropriate flexibility for adapting to curved anatomical paths. This segmentation allows the system to simultaneously achieve both adaptability and control precision - the flexible portion conforms to physiological curves while the rigid stabilizing portion maintains positioning accuracy.
Solution Approach 2:
Different portions of the delivery device are assigned different mechanical properties: the stabilizing tube has high rigidity for precise positioning control, while the bending adjustment tube has controlled flexibility for adapting to curved paths. This local differentiation of material or structural properties allows each section to optimize its function, achieving both adaptability and precision without compromise.
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
Improves the precision and stability of valve delivery by ensuring better coaxiality with physiological valves, reducing the risk of displacement and damage during valve release.
Implementation Method 1
The traction block drives the withdrawing assembly to move by means of the traction wire, to adjust bending degree of the bending adjustment tube
Implementation Method 2
the hardness of the stabilizing tube is greater than that of the bending adjustment tube. When the bending adjustment tube is bent by being pulled by the traction wire, the stabilizing tube can limit the bending degree of the bending adjustment tube
Data Source
AI summary
Provided is a valve delivery device, including a bending adjustment tube, a withdrawing assembly, a traction wire, a bending adjustment wheel and a stabilizing tube. The withdrawing assembly is connected to the bending adjustment tube. The bending adjustment wheel is provided with a traction block. One end of the traction wire is connected to the withdrawing assembly, and the other end is connected to the traction block. The stabilizing tube sleeves the bending adjustment tube and is arranged between the withdrawing assembly and the bending adjustment wheel. The bending adjustment wheel is configured for adjusting the position of the traction block, and the traction block drives the withdrawing assembly to move by means of the traction wire to adjust the bending degree of the bending adjustment tube, and the stabilizing tube is configured for limiting the bending position of the bending adjustment tube.