Catheter Monorail Separation Guide for Stent Surgery
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Solution Overview
Problem
Conventional catheters for stent surgery face issues with guide wires becoming entangled with the inner tube, preventing smooth forward and backward movement and making it difficult to guide the stent to the target location.
Innovation Solution
A monorail system with a separation guide inserted into the outer tube to maintain a constant direction for the guide wire, ensuring it remains spaced from the inner tube, allowing for reliable forward and backward movement without entanglement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the guide wire is inserted into the outer tube to reduce its length and facilitate handling, then the guide direction setting becomes easier and production cost is reduced, but the guide wire may contact and become entangled with the inner tube, preventing smooth movement
Solution Approach 1:
A separation guide is introduced as an intermediary component between the guide wire and inner tube. The separation guide includes a guide wire passage that receives and guides the guide wire, and an inner tube passage that receives the inner tube, thereby preventing direct contact and entanglement between the guide wire and inner tube while maintaining the reduced guide wire length configuration
2Ease of manufacture
If the guide wire length is reduced to improve handling and reduce cost, then ease of operation and production cost are improved, but the guide wire cannot be reliably moved to the target location due to entanglement
Solution Approach 1:
The separation guide acts as a mediator that enables the use of shorter guide wires without compromising positioning reliability. By providing separate passages for the guide wire and inner tube, it prevents entanglement issues that would otherwise prevent reliable movement of the shortened guide wire to the target location
3Device complexity
If the guide wire and inner tube share the same pathway in the outer tube, then device complexity is reduced, but the guide wire becomes entangled with the inner tube and cannot move smoothly
Solution Approach 1:
The separation guide segments the shared pathway into distinct channels: a guide wire passage for the guide wire and an inner tube passage for the inner tube. This segmentation prevents entanglement while adding minimal complexity to the overall catheter structure, as the separation guide can be integrated into the existing outer tube configuration
Solution Approach 2:
The separation guide introduces a spatial dimension by creating separate three-dimensional pathways within the outer tube. Instead of a single shared linear path, the guide wire and inner tube are routed through different spatial channels, eliminating entanglement while maintaining a relatively simple overall structure
Data Source
AI summary
A monorail guides a guide wire introduced into an outer tube in a catheter for stent surgery. The catheter includes the outer tube having an outer hole, an inner tube installed in the outer tube, and a guide wire inserted into the outer hole and the inner tube and protruding outwards from a front end of the inner tube so that the outer tube and the inner tube move along the guide wire so as to be guide a stent. The monorail includes a separation guide which is inserted into and fixed in the outer tube and configured such that the guide wire that is inserted into the outer hole is spaced apart from the inner tube without making contact with the inner tube.