Vascular Stent Delivery Control for Fast and Precise Release
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Solution Overview
Problem
Traditional delivery apparatuses for vascular stents suffer from slow release processes and long operation times, which can lead to postoperative complications due to their structural defects, particularly in the complex anatomical environment of the aortic arch.
Innovation Solution
A delivery apparatus equipped with a control device that includes a fixing unit and a movable unit, allowing for speed control of vascular stent release through a screw rod mechanism with interchangeable thread engagement, enabling both fast and fine movements to facilitate quick and controlled deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional delivery apparatuses use a hollow inner tube and outer tube structure, then the guide wire can pass through during operation, but the release process of the vascular stent is too slow and operation time is too long
Solution Approach 1:
The patent applies dynamics by making the inner tube movable relative to the outer tube through a control mechanism. The inner tube can be rapidly retracted from the stent by moving distally relative to the outer tube, enabling fast stent release. This dynamic structure allows the system to transition from a static delivery configuration to a rapid release configuration, solving the contradiction between ease of operation and operation time.
Solution Approach 2:
The delivery apparatus is segmented into functionally independent components: an outer tube for guiding and protecting, an inner tube for stent release control, and a control mechanism for coordinating their movements. This segmentation allows the inner tube to be independently actuated for rapid retraction, enabling fast stent deployment while maintaining the guide wire passage function of the outer tube structure.
2Reliability
If the delivery apparatus uses a traditional sleeved structure, then the vascular stent can be held between tubes, but the release process is too slow which is not conducive to postoperative recovery
Solution Approach 1:
The patent transforms the static sleeved structure into a dynamic release mechanism. The inner tube is equipped with a control mechanism that enables rapid distal movement, allowing the inner tube to quickly retract from the stent and initiate deployment. This dynamic capability maintains reliable stent holding during delivery while achieving fast release for improved productivity and patient outcomes.
Solution Approach 2:
The inner tube serves as an intermediary component between the operator's control and the stent deployment. By controlling the inner tube's movement through the control mechanism, the system achieves precise and rapid stent release. The inner tube mediates the transition from the held state to the deployed state, enabling fast release while maintaining reliable holding capability.
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 achieves rapid and precise control over vascular stent release, reducing operation time and minimizing complications by integrating a control device that manages fast and slow movements of the connecting member.
Implementation Method 1
a screw rod provided with an accommodating hole and a sliding groove communicating with the accommodating hole
Implementation Method 2
the internal thread structure is engaged with the screw rod through a thread transmission
Implementation Method 3
the control member is provided with an elastic component, and the elastic component is in an elastic deformation state
Data Source
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AI summary
The present application disclosed a delivery apparatus and a control device. The control device includes a fixing unit and a movable unit, the fixing unit includes a screw rod provided with an accommodating hole and a sliding groove communicating with the accommodating hole; the movable unit includes a connecting member, a first handle, a mating member, and a control member; the connecting member is provided with a first connecting body and a second connecting body fixed to the first connecting body, the first connecting body is arranged in the accommodating hole, and the first connecting body is slidingly engaged with the screw rod, the first connecting body is provided with a connection portion, the second connecting body is rotatably connected to the first handle passing through the sliding groove,the first handle is hollow and is sleeved on an outside of the screw rod, and movable relative to the screw rod, the mating member is arranged in the first handle, and the mating member is provided with an internal thread structure engaged with the screw rod, the control member is movably arranged on the first handle. The control device can control the fast movement and the slow movement of the connecting member, thereby facilitating the realization of the speed control of the release of the vascular stent. The delivery apparatus uses the control device.