Valve Delivery System With Elastic Fixing Claw
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Solution Overview
Problem
Self-expanding artificial valves tend to pop out and undergo large deformation when released from the delivery device, leading to potential displacement and damage to the human body.
Innovation Solution
A valve delivery system featuring a valve with a fixing part and a delivery device comprising a bolt wire assembly and a withdrawing assembly with an elastic fixing claw. The system allows for controlled and delayed release of the valve by using the bolt wire assembly and fixing claw to manage the expansion and fixation of the valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve is released from the delivery device, then the valve can be expanded to function, but the valve may pop out and undergo large deformation causing displacement or damage
Solution Approach 1:
The patent applies preliminary action by pre-configuring a controlled release mechanism within the delivery device that manages the valve expansion process step-by-step. The delivery device includes a release mechanism that gradually releases the valve from the constrained state to expanded state, preventing sudden popping out and large deformation that could cause displacement or damage to the body.
Solution Approach 2:
The delivery device acts as an intermediary between the compressed valve and the final deployed valve. It provides a controlled interface that manages the transition, using mechanical structures such as expansion balloons or shape memory alloys to mediate the expansion process, ensuring the valve expands gradually and controllably rather than instantly.
2Reliability
If a long claw structure is provided to fix the valve, then the valve can be secured, but the valve size increases affecting structural design and increasing lesion risk
Solution Approach 1:
The patent applies nesting by placing the fixing claws inside the delivery device catheter in a compressed state. The claws are nested within the delivery system, allowing them to be transported through blood vessels without increasing the overall valve profile. Upon deployment, the claws extend outward from the compressed position to engage with the vessel wall, providing fixation without requiring a larger valve size during delivery.
Solution Approach 2:
The fixing mechanism transitions from a one-dimensional linear claw structure to a three-dimensional deployment configuration. The claws are arranged radially and can expand outward in multiple directions from the central axis, providing comprehensive fixation capability without increasing the axial length or radial profile of the valve during delivery.
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 system enables a controlled and delayed release of the valve, reducing the risk of valve displacement and damage to the human body by managing the rapid expansion of the valve during release.
Implementation Method 1
the valve is able to be partially expanded under an action of its own elastic force
Implementation Method 2
the valve may drive the fixing claw to expand outward under the action of its own elastic force
Data Source
AI summary
A valve delivery system, comprising a valve and a delivery device. The valve is provided with a fixing part provided with a fixing hole. The delivery device comprises a bolt wire assembly comprising a bolt wire and a withdrawing assembly comprising a fixing claw, which is provided with a limiting hole and has elasticity. When the fixing part passes through the limiting hole, the bolt wire assembly passes through the fixing hole and limits separation of the fixing part from the limiting hole, so that the valve is in a connected state. When the bolt wire is separated from the fixing hole, the fixing part is separated from the limiting hole under the elastic action of the valve, so that the valve is in an unhooked state. The valve is controlled by the fixing claw and the bolt wire to realize delayed and controllable release of the valve.