Occluder Pushing Device Locking Mechanism for Accurate Deployment
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Solution Overview
Problem
Existing occluder pushing devices often result in inaccurate release positions due to accidental contact during interventional medical procedures, leading to unsuccessful operations.
Innovation Solution
An occluder pushing device with a pushing tube and traction element, featuring a translation mechanism for axial movement and a rotation mechanism with a locking structure to prevent accidental rotation, ensuring precise control and accurate occluder deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple pushing device is used, then the device complexity is reduced, but the reliability of occluder release position deteriorates due to accidental contact
Solution Approach 1:
The pushing device is segmented into distinct functional modules: a pushing tube for axial movement, a rotation mechanism with locking structure for rotational control, and a locking component for position fixation. This segmentation allows each module to perform its specific function independently, reducing the risk of accidental interactions while maintaining overall device reliability.
Solution Approach 2:
The rotation mechanism includes a locking structure that can preliminarily lock the traction element at the desired rotation position before final occluder release. This preliminary locking action prevents accidental rotation during the pushing process, ensuring that the occluder is released only at the intended position and orientation.
2Reliability
If a locking component is added to prevent accidental release, then the reliability of occluder release position is improved, but the device complexity increases
Solution Approach 1:
The locking component is merged with the rotation mechanism, forming an integrated assembly where the locking structure is part of the rotation control system. This merging reduces the number of separate components needed, as the locking function is combined with the rotational actuation mechanism rather than being a completely separate system.
Solution Approach 2:
The locking component serves multiple functions: it locks the traction element axially within the pushing tube, locks the rotation mechanism at specific angular positions, and can be released controllably to allow movement. This multi-functionality reduces the need for separate locking mechanisms for each degree of freedom, simplifying the overall device structure.
Data Source
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AI summary
The present disclosure relates to an occluder pushing device and an occluder delivery system, wherein the pushing device includes a pushing component and a handle. The pushing component includes a pushing tube and a traction element slidably inserted into the pushing tube. The handle is fixedly connected to a proximal end of the pushing tube and internally provided with a moving component and a locking component. The moving component includes a translation mechanism and a rotation mechanism, where the translation mechanism is used to drive the traction element to move axially inside the pushing tube, and the rotation mechanism is used to drive the traction element to rotate axially inside the pushing tube. The locking component is used to lock relative positions of the traction element and the pushing tube, and the rotation mechanism includes a locking structure for locking or releasing linkage between the rotation mechanism and the traction element. The pushing device of the present invention has provided therein the locking component for locking the traction element and the pushing tube in relative positions, such that when the pushing tube pushes the occluder, the relative positions of the traction element and the pushing tube lock the occluder in a folded state, thereby preventing the occluder from being prematurely released before reaching a pre-determined position.