Slit Endoscope Cap with Mucosa Grasping Member
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Solution Overview
Problem
Endoscopic submucosal dissection (ESD) procedures face challenges in maintaining a clear endoscopic field of view and securely holding the mucosa during incision, as existing instruments with large caps struggle to pass through narrow incisions and often slip off due to manipulation, requiring repeated operations.
Innovation Solution
A cylindrical endoscope procedure instrument with a slit on its side surface and a grasping member that can be moved within the slit to lift and hold the mucosa, allowing continuous visualization and secure grip without the need for repeated repositioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transparent cap with large diameter is attached to the endoscope to lift and hold the mucosa, then the mucosa can be held and elevated, but the cap cannot pass through the narrow incision and may slip off during manipulation
Solution Approach 1:
The cap is divided into two functional parts: a large-diameter main body for reliable mucosa holding and a separate thin-film expansion section that can pass through narrow incisions. The thin-film section expands only when needed to provide sufficient diameter for mucosa engagement, combining the advantages of both small and large diameters in different operational phases.
Solution Approach 2:
The cap transitions from a compressed state (for passing through narrow incisions) to an expanded state (for holding and lifting the mucosa). This dynamic transformation allows the cap to adapt its diameter according to the operational requirements at different stages of the procedure.
2Productivity
If the endoscope is manipulated to incise and separate the submucosa, then the resection can be performed, but the mucosa may slip off from the cap requiring repeated repositioning operations
Solution Approach 1:
The cap features a spherical or rounded front end that conforms to the natural curvature of the mucosa. This curved geometry provides superior contact and grip compared to flat or angular designs, reducing the likelihood of slippage during manipulation and incision operations.
Solution Approach 2:
The cap is made transparent or translucent, allowing the operator to visually confirm the position of the mucosa relative to the cap during the procedure. This visual feedback enables real-time adjustment and verification of proper positioning, reducing the need for repeated repositioning operations.
3Manufacturing precision
If the mucosa is elevated to a sufficient position for resection, then the cutting operation can be performed, but the endoscopic field of view may be obstructed requiring repeated repositioning
Solution Approach 1:
The cap is designed to elevate the mucosa in the vertical dimension (away from the endoscope lens) while maintaining a low profile in the horizontal dimension (parallel to the optical axis). This dimensional separation allows sufficient elevation for precise resection while minimizing obstruction of the endoscopic field of view.
Data Source
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AI summary
An endoscope procedure instrument provided with: a tube part that is cylindrical in shape and attaches to the front end of the endoscope, the tube part having a slit provided to the side surface thereof extending along the direction of the central axis; and a grasping member that is disposed to the tube part extending along the slit, for holding a biologic tissue with respect to the endoscope.