Endoscope Treatment Tool Pivot Shaft Rotation
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Solution Overview
Problem
Current endoscopic submucosal dissection (ESD) methods face challenges in efficiently manipulating and cutting the submucosal layer around pathological lesions due to limitations in the movement and positioning of treatment tools within the endoscope, which can lead to difficulties in grasping and cutting the mucous membrane without obstructing the field of view or causing tissue to fall.
Innovation Solution
An endoscope treatment tool with a cylindrical distal end member, a treatment portion, and a connection member that allows for free rotation and extension/retraction, featuring a first and second pivot shaft for movement and a pair of forceps members that can be opened and closed, enabling the treatment portion to move beyond the center axis and maintain a clear field of view, facilitating the cutting and lifting of biological tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the treatment portion is fixed at a fixed position relative to the endoscope, then the structure is simple, but the treatment portion cannot move freely to grasp and cut the mucous membrane effectively
Solution Approach 1:
The treatment portion is connected to the endoscope via a flexible connection member with pivot shafts, allowing the treatment portion to move dynamically relative to the endoscope. This dynamic connection enables the treatment portion to reach different positions and orientations for effective grasping and cutting operations while maintaining a relatively simple overall structure.
2Illumination intensity
If the treatment portion is extended far from the endoscope, then the field of view is not obstructed, but the control and positioning becomes difficult
Solution Approach 1:
The connection member acts as an intermediary mechanism between the endoscope and the treatment portion. It transmits control forces while allowing the treatment portion to extend to optimal positions for clear field of view. The pivot shafts in the connection member enable controlled movement and positioning even when the treatment portion is extended, maintaining both visibility and operability.
3Illumination intensity
If the treatment portion is positioned on the lateral side of the distal end member, then the field of view is clear, but the treatment portion cannot effectively reach the center area for cutting
Solution Approach 1:
The treatment portion can dynamically change its position from lateral to central areas through the flexible connection member with pivot shafts. This dynamic repositioning capability allows the treatment portion to access different tissue locations including the center area for cutting, while maintaining clear field of view when positioned laterally for observation.
Solution Approach 2:
The connection member enables movement in multiple dimensions, allowing the treatment portion to transition between lateral and central positions, and between different heights. This multi-dimensional movement capability provides both clear lateral field of view and effective central reachability for comprehensive tissue treatment.
Data Source
AI summary
The endoscope treatment tool 1 has a distal end member 3 which is installed in an endoscope. A connection member 4 is attached to the distal end member 3 in a freely rotatable manner. In the connection member 4, a portion which is supported by a cap 12 of the distal end member 3 is a second pivot shaft 15. A portion penetrating a supporting member 21 of a treatment portion 5 is a first pivot shaft 23. The first pivot shaft 23 is also a rotational axis of a pair of forceps members 22 provided in the treatment member 5. When the forceps members 22 are used, a coil sheath 6 is extended by an operation at the side of the proximal end. The connection member 4 rotates about the second pivot shaft 15, which is a fulcrum, and the treatment portion 5 moves forward beyond the cap 12. In accordance with the present invention, it is possible to resolve the difficulty of procedures by positioning the treatment portion in an appropriate location.