Endoscopic Mucosal Lifting Instrument with Nested Wires
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Solution Overview
Problem
Existing endoscopic procedures face difficulties in inserting the distal end of an endoscope device between the submucosal layer and the muscular layer, especially when the opening formed near the lesion mucosal portion is small, making it challenging to create a sufficient working space for removing the mucosal layer.
Innovation Solution
An endoscopic mucous membrane lifting instrument with a cap mounted at the distal end of the endoscope device, featuring first and second wires with U-shaped portions and a wire-manipulating portion that allows independent operation, facilitating easy insertion and creating a wider working space between the submucosal and muscular layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the opening formed near the lesion mucosal portion is small, then the precision of lesion targeting is maintained, but the ease of inserting the distal end of the endoscope device between the submucosal layer and the muscular layer deteriorates
Solution Approach 1:
The first wire is inserted through the insertion portion of the endoscope device, and the second wire is inserted through the first wire. This nested configuration allows both wires to be delivered through a single small opening while maintaining their individual functions, resolving the contradiction between small opening size and ease of insertion
2Measurement precision
If the opening formed near the lesion mucosal portion is small, then the precision of lesion targeting is maintained, but the volume of working space for removing the mucosal layer deteriorates
Solution Approach 1:
The first wire extends in a direction approaching the extension line of the central line of the insertion portion (longitudinal dimension), while the second wire extends along the central line (axial dimension). This multi-dimensional wire arrangement creates working space in multiple directions from the small opening, effectively increasing the functional working space volume without compromising lesion targeting precision
3Device complexity
If a single wire is used for mucous membrane lifting, then the device complexity is reduced, but the versatility of creating working space in multiple directions deteriorates
Solution Approach 1:
The lifting function is divided into two separate wires with distinct functions: the first wire creates initial separation space by extending toward the central line, and the second wire extends along the central line to create additional working space. This segmentation allows each wire to be optimized for its specific function while together providing versatile working space creation in multiple directions
Data Source
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AI summary
An endoscopic mucous membrane lifting instrument includes: a cap mounted at a distal end of an insertion portion of an endoscope device; a first wire disposed at the cap and configured to be capable of protruding from an outer circumferential portion of the distal end of the insertion portion toward a direction more distal than the insertion portion and in a direction approaching an extension line of a central line of the insertion portion; a second wire disposed at the cap and be capable of protruding from the outer circumferential portion of the insertion portion along the central line of the insertion portion in the distal direction than the insertion portion; and a wire-manipulating portion configured to independently operate the first wire and the second wire.