Guide Wire Capture Device Using Auxiliary Catheter
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Solution Overview
Problem
Existing snaring devices for guide wires irreparably damage the wires by causing permanent plastic deformation when attempting to retrieve them, which hinders subsequent operations.
Innovation Solution
A device comprising a snaring device and an auxiliary catheter that allows the guide wire to be captured without bending, using an auxiliary catheter that is at least partially echo-transparent and/or radio-transparent, with a radio-opaque and/or echo-opaque portion for visibility and flexibility, allowing the guide wire to be slid into the snaring device without deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a snaring device is used to capture and retrieve a guide wire, then the guide wire can be brought outside the patient, but the guide wire suffers permanent plastic deformation and is damaged
Solution Approach 1:
The patent introduces a catheter as an intermediary device between the snaring device and the guide wire. The catheter receives the guide wire in a relaxed state and guides it through the snaring device loops without direct mechanical grasping. This intermediary protects the guide wire from deformation while enabling its retrieval through the patient's body.
Solution Approach 2:
The patent divides the retrieval system into separate functional components: the snaring device for capture, the catheter for protection and guidance, and the guide wire for medical procedures. This segmentation allows each component to perform its function without compromising the others, particularly protecting the guide wire from damage.
2Ease of operation
If the guide wire is grasped by the snaring device with concentrated mechanical action, then the guide wire can be captured, but permanent plastic deformation occurs
Solution Approach 1:
The catheter acts as a mediator that receives the guide wire before it enters the snaring device. The guide wire is inserted into the catheter in a controlled, relaxed state, avoiding the concentrated mechanical action of the snaring loops. The catheter then guides the protected guide wire through the snaring device, preserving its original geometry.
Solution Approach 2:
The guide wire is preliminarily positioned inside the catheter before encountering the snaring device. This preliminary action protects the guide wire from deformation by providing a protective channel through which it can be guided safely through the capture mechanism.
Data Source
Figure 1~4
AI summary
A device (10) for capturing a guide wire (50) comprises a snaring device (20, 30) and an auxiliary catheter (40). The auxiliary catheter (40) is configured to slidingly accomodate the guide wire to be caught so as to extend a distal end (47) thereof beyond the distal end of the guide wire in order to be caught by the snaring device (20, 30) while the guide wire (50) is in a retracted position in the auxiliary catheter (40). The auxiliary catheter preferably comprises a portion which is at least partially echo-transparent and/or radio- transparent and an end portion (44) which is radio-opaque and/or echo-opaque.