Stent Graft Transport Device Nested Wire Mechanism
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Solution Overview
Problem
The process of pulling and drawing out contracted and mounted state keeping wires from the distal end of a transport tube is complicated, leading to potential time consumption and risk of wire cutting during stent graft deployment in blood vessels.
Innovation Solution
A stent graft transport device with a mounting mechanism that houses the operation end of the mounted state keeping wire inside the transport tube, allowing for secure and simple release using a pulling-out string mechanism, and a contraction mechanism that houses the operation end of the contracted state keeping wire for expanding the stent graft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operation end parts of keeping wires are exposed through a window on the transport tube, then the wires can be accessed by operators, but the process becomes complicated and time-consuming with risk of wire cutting
Solution Approach 1:
The operation end parts of the keeping wires are nested inside the transport tube rather than being exposed externally. The pulling-out strings are also housed within the transport tube, creating a nested configuration where internal components are protected and organized, eliminating the need for operators to manually search for and grasp exposed wires through a window.
Solution Approach 2:
Pulling-out strings are introduced as intermediary elements that connect the operation end parts of the keeping wires to the external environment. Instead of directly manipulating the keeping wires, operators pull the keeping wires indirectly through the pulling-out strings, which serve as mediators that simplify the extraction process and reduce the risk of wire cutting.
2Ease of operation
If multiple keeping wires are exposed through a window, then operators can access them, but the complexity of picking and drawing out multiple wires increases
Solution Approach 1:
Multiple keeping wires and their corresponding pulling-out strings are combined and housed together within the transport tube. This merging of components into a single integrated system allows operators to manage multiple wires through a unified structure, reducing the complexity of handling individual exposed wires separately.
Solution Approach 2:
Pulling-out strings serve as intermediary elements for each keeping wire, allowing operators to extract multiple wires through a standardized indirect mechanism. This intermediary approach simplifies the extraction process by providing a consistent method for handling multiple wires, reducing the overall operational complexity.
3Ease of operation
If keeping wires are exposed externally, then they can be manipulated, but the risk of accidental cutting during manipulation increases
Solution Approach 1:
The operation end parts of the keeping wires are nested inside the transport tube, protected from external damage. This nested configuration shields the wires from accidental cutting during manipulation, as they are not exposed to the external environment where they could be inadvertently cut by surgical instruments or accidental contact.
Solution Approach 2:
Pulling-out strings serve as protective intermediaries that extend from the protected internal environment to the external manipulation zone. By manipulating the pulling-out strings rather than the keeping wires directly, the risk of accidentally cutting the critical keeping wires is significantly reduced, as the strings act as a sacrificial intermediary layer.
Data Source
AI summary
A transport device comprises a transport tube that extends from a rear end of a medical device. The transport tube has a double tube structure comprising an inner tube and an outer tube. The inner tube projects from a distal end part of the outer tube, and a distal end part of the inner tube is connected to the medical device. The outer tube and the inner tube are firmly fixed at a proximal end part of the outer tube.