Vascular Closure Pulling Control with Spring-Rotary Release
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Solution Overview
Problem
Existing vascular closure devices face difficulties in safe and easy operation due to mechanical limit snap mechanisms that require forceful pinching and are prone to accidental disengagement, leading to user inconvenience and potential malfunction.
Innovation Solution
A pulling control apparatus with a spring mechanism, rotating components, and pressing components that provide tensile force and axial displacement control, ensuring stable operation and preventing accidental detachment, featuring a conical cap, main body, and actuating components for precise alignment and expansion/contraction control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical limit snap mechanism is used for rear pulling control, then the device can achieve deployment and occlusion, but the operation becomes inconvenient and prone to accidental disengagement
Solution Approach 1:
The patent replaces the traditional mechanical limit snap mechanism with a rotating component system that uses rotational motion and axial displacement limitation to control deployment. The rotating component connects the pressing component and pulling wire, using rotation rather than linear snap-action to achieve the same deployment function, thereby eliminating the need for forceful pinching and reducing accidental disengagement risks
Solution Approach 2:
The patent introduces a dynamic rotating component that can freely rotate in the circumferential direction while maintaining axial displacement limitation. This dynamic element allows smooth operation during pulling while maintaining control over the deployment process, replacing the static snap mechanism with a more flexible rotational system that is easier to operate reliably
2Force
If forceful pinching is applied to overcome limit snap resistance, then the mechanism can be pulled rearward, but the operation becomes very inconvenient
Solution Approach 1:
The patent substitutes the linear snap-action mechanism with a rotational system where the rotating component can freely rotate. This eliminates the need to overcome high friction resistance from forceful pinching, as the rotational mechanism allows smooth pulling motion without the abrupt engagement and disengagement of a snap mechanism
Solution Approach 2:
Instead of pulling linearly against a snap mechanism, the patent inverts the approach by using rotational motion to control the deployment. The rotating component converts the pulling motion into rotation, which then translates to the desired linear displacement of the pulling wire, making the operation more convenient and requiring less force
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 apparatus provides a safer and more convenient operation by utilizing a spring for tensile force, ensuring stable expansion and contraction of the vascular closure device, preventing misoperations and enhancing user experience.
Implementation Method 1
a spring disposed within the housing for providing tensile force and tensile displacement
Data Source
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AI summary
A pulling control apparatus for a vascular closure device, comprising: a housing, a spring [33] disposed within the housing for providing tensile force and tensile displacement, a rotating component [34] and pressing component [35] assembly for controlling different states, wherein the rotating component [34] and pressing component [35] are axially limited after connection and can rotate freely in the circumferential direction; a pulling wire [11] can pass through the interior of the device and is fixed to a fixed component [36] at the rear end of the pressing component [35]; by pressing the pressing component, the rotating component [34] switches positions, relying on the spring [33] to provide tensile force and transmitting the tensile force to the front end through the pulling wire [11]. The present apparatus is safer and easier to use while avoiding device failure.