Guidewire Capture Device for Retrograde Retrieval
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Solution Overview
Problem
Retrieving a retrograde guidewire from a body lumen is challenging, especially when attempting to re-vascularize a chronic total occlusion, as it is difficult to penetrate the proximal cap and then retrieve the guidewire for further medical device delivery.
Innovation Solution
A guidewire retrieval system comprising a retrieval catheter and a guidewire capture device with a hoop member and hook members that expand within the body lumen to capture and align the guidewire with the catheter's lumen, allowing for rotation to securely capture and retrieve the guidewire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guidewire is introduced in a retrograde procedure to penetrate a proximal cap of a chronic total occlusion, then the guidewire can be advanced through the occlusion from a distal location, but it becomes difficult to retrieve the guidewire from the body lumen for further medical device delivery
Solution Approach 1:
A retrieval catheter with a capture device is introduced as an intermediary tool to facilitate guidewire retrieval. The capture device, positioned at the distal end of the retrieval catheter, engages with the guidewire tip and allows the guidewire to be pulled back through the retrieval catheter's lumen, solving the retrieval difficulty without compromising the initial penetration capability
Solution Approach 2:
The retrieval system is segmented into distinct functional components: the retrieval catheter for access and support, the capture device for engagement, and the guidewire itself. This segmentation allows each component to be optimized for its specific function while working together as an integrated system for both penetration and retrieval operations
2Ease of manufacture
If the guidewire tip is introduced at a distal location to penetrate the softer distal cap, then penetration is achieved, but the guidewire must be retrieved through the body lumen which is complex and time-consuming
Solution Approach 1:
The retrieval catheter and capture device are positioned and prepared in advance within the body lumen before guidewire retrieval is needed. The capture device is pre-configured to engage the guidewire tip, allowing immediate capture and rapid retrieval without complex manipulation or additional procedural steps
Solution Approach 2:
The retrieval catheter serves as a pre-positioned intermediary pathway that guides the guidewire from its distal location back to the proximal exit point. This pre-established route eliminates the need for complex external manipulation and significantly reduces retrieval time
Data Source
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AI summary
A guidewire retrieval system generally comprises a guidewire capture device. The guidewire capture device includes a hoop member defining a hoop passage for receiving the guidewire therein, and a hook member extending inwardly from the hoop member toward the axis of the guidewire capture device. The hook member is configured to capture the guidewire received in the hoop passage as the guidewire capture device is rotated about its axis.