Radial Wire Catch Basket for Unobstructed Surgical Views
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Solution Overview
Problem
Conventional tissue retrieval devices used in minimally invasive surgeries, such as polyp removal, face challenges with impaired camera views due to mesh netting, which obstructs the surgeon's view and can interfere electrically, making it difficult to position and rotate the retrieval component within small body cavities.
Innovation Solution
A tissue capturing component with radially oriented wires that can be fully retracted into a conduit, featuring radial gaps for unobstructed camera views and allowing for rotation, enabling the device to function as both a snare and catch basket, with an optional cauterization loop, and independent control of the snare and basket.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mesh netting is used for tissue retrieval, then tissue capture capability is improved, but camera view is impaired and electrical interference occurs
Solution Approach 1:
The retrieval device is segmented into multiple functional components: a snare for tissue capture and a separate catch basket for retrieval. This segmentation allows each component to be optimized independently - the snare can be mesh-based for effective capture while the catch basket uses radial wires with gaps for unobstructed camera views and electrical isolation.
Solution Approach 2:
The harmful electrical conductivity and view-blocking properties are extracted from the retrieval component by removing the mesh netting and replacing it with radially oriented wires that have gaps between them. This extraction eliminates the electrical interference and camera view impairment while retaining the tissue retrieval function.
2Adaptability or versatility
If mesh netting is used for tissue retrieval, then tissue capture capability is improved, but electrical interference occurs
Solution Approach 1:
The electrical conductivity harmful property is extracted from the retrieval component by removing the mesh netting and replacing it with radially oriented wires. The gaps between the wires provide electrical isolation, eliminating the electrical interference that would occur with continuous mesh netting while preserving the tissue capture and retrieval functions.
Solution Approach 2:
Different parts of the device have different electrical properties - the snare maintains electrical conductivity for cauterization function, while the catch basket uses electrically isolated radial wires for retrieval. This local differentiation of electrical properties allows the device to perform both functions without interference.
3Adaptability or versatility
If conventional retrieval components are used, then tissue retrieval is possible, but positioning and rotation within small cavities is difficult
Solution Approach 1:
The catch basket is designed with radially oriented wires that can dynamically adjust their configuration. The wires are flexible enough to allow the basket to rotate and position itself within small body cavities, improving ease of operation while maintaining the tissue retrieval function.
4Adaptability or versatility
If mesh netting is used, then tissue capture is effective, but camera view is blocked
Solution Approach 1:
The device is segmented into a snare component for tissue capture and a catch basket component for retrieval. The catch basket uses radially oriented wires with gaps instead of mesh netting, allowing camera light to pass through unobstructed while the snare provides effective tissue capture capability.
Data Source
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AI summary
A device for retrieval of organic and inorganic matter during a surgical procedure employing a camera and viewer to ascertain a removal target. The device has a catch basket formed of a plurality of radially oriented shaped wires extending an axis with gaps in-between for camera viewing and light transmission. A mouth aperture area is maximized by formation in a single plane and using wires of a shape to form an oval, crescent, or hexagon. A cauterizing snare may be formed using wires forming the mouth, may project from the catch basket, or may be used separate from the catch basket. Shaped memory material forming the wires maintains the shape of the catch basket, mouth, and snare, despite repeated compressions thereof into catheter housed conduits.