Pivoting Endoscope Cap for Precise Tissue Gripping in ESD
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Solution Overview
Problem
Existing endoscopic submucosal dissection (ESD) traction devices face challenges in efficiently gripping and lifting mucosal tissue due to limitations in the design of the cap-type devices attached to the endoscope, which affect the precision and effectiveness of the procedure.
Innovation Solution
An endoscope cap with a cylindrical hood portion, a cap portion, a channel tube, and a pivotable coupling member that allows the gripping device to move between raised and lowered positions, enabling precise tissue gripping and lifting by positioning support holes closer to the proximal end of the hood portion, enhancing the device's flexibility and grip range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the support holes are positioned closer to the distal end of the hood portion, then the gripping device can be positioned closer to the tissue for better visualization, but the range of motion and flexibility of the gripping device is reduced
Solution Approach 1:
The coupling member is configured to extend along the outer circumferential surface of the hood portion rather than radiating directly outward, utilizing the circumferential dimension to achieve both proximity to tissue and maintained range of motion through angular positioning
2Stability of the object's composition
If the coupling member is made rigid to provide stable support for the gripping device, then the positioning stability is improved, but the flexibility and adaptability to different tissue positions is reduced
Solution Approach 1:
The coupling member is designed as a pivotable connection rather than a fixed rigid or completely flexible joint, allowing dynamic adjustment of the gripping device position while maintaining structural support, enabling the system to adapt to different tissue positions while preserving stability
3Adaptability or versatility
If the hood portion is made larger to accommodate more complex mechanisms, then the functional capabilities are improved, but the interference with peripheral tissues and difficulty in navigation is increased
Solution Approach 1:
The device is divided into separate functional modules: the hood portion for navigation and positioning, the coupling member for mechanical connection, and the gripping device for tissue manipulation. This segmentation allows each component to be optimized independently, maintaining a compact overall structure while providing complex functionality
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enables improved tissue gripping and lifting capabilities, allowing for more precise manipulation of tissue within the endoscope's visual field, facilitating effective ESD procedures with enhanced control and reduced interference with peripheral tissues.
Implementation Method 1
the coupling member is pivotable with respect to the hood portion, with the individual support holes serving as fulcrums
Data Source
AI summary
An endoscope cap includes: a hood portion attached to a distal end portion of an endoscope; a cap portion connected to a distal end of the hood portion, having an abutting surface against which the endoscope is abutted in a state of the endoscope being inserted into the hood portion, and protruding from the distal end of the hood portion; a channel tube into which an elongated device is inserted; and a coupling member for coupling the device with the hood portion, the member being supported by the hood portion and extending along the hood portion. The hood portion has a pair of support holes into which the member is inserted. The member is pivotable with respect to the hood portion, with the individual support holes serving as fulcrums. The holes are formed at positions closer to a proximal end of the hood portion than the abutting surface is.