Endoscope Knife Passage for Adjustable Injection Pressure
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Solution Overview
Problem
Existing endoscopic treatment tools lack the ability to efficiently perform both high-frequency incision and local injection with adjustable water pressure without requiring tool changes, complicating the Endoscopic Submucosal Dissection (ESD) procedure.
Innovation Solution
An endoscope treatment tool with a sheath, knife, and connecting unit, featuring a passage-forming portion that can translate between positions to adjust water pressure, allowing for both high-frequency incision and local injection using a single tool by altering the cross-sectional area of the passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single treatment tool is used for both high-frequency incision and local injection, then tool complexity is reduced, but the ability to adjust water pressure for different procedures is compromised
Solution Approach 1:
The passage-forming portion is designed to be movable between a first position and a second position along the longitudinal axis of the knife. This dynamic configuration allows the passage cross-sectional area to be adjusted, enabling water to flow at different pressures for incision versus injection functions, thus achieving adaptability within a single tool structure.
Solution Approach 2:
The treatment tool integrates multiple functions into a single device: high-frequency incision, local injection, and hemostasis. The knife includes both an electrode for high-frequency current and a passage for liquid flow, allowing the same tool to perform different therapeutic functions by adjusting the passage configuration and liquid flow rate.
2Productivity
If multiple treatment tools are used for different procedures, then procedural versatility is maintained, but procedural efficiency decreases due to tool changes
Solution Approach 1:
The treatment tool is designed as a multi-functional device that can perform high-frequency incision, local injection, and hemostasis using a single integrated structure. The knife includes an electrode for high-frequency current and a passage for liquid flow, eliminating the need for tool changes during ESD procedures while maintaining all necessary functional capabilities.
Solution Approach 2:
The invention merges previously separate treatment tools (incision tool and injection tool) into a single integrated device. The knife combines the electrode for high-frequency incision with a passage for liquid injection, allowing both functions to be performed sequentially or simultaneously without removing or changing tools during the procedure.
3Ease of operation
If the passage cross-sectional area is fixed, then device simplicity is maintained, but the ability to control water pressure for different steps is lost
Solution Approach 1:
The passage-forming portion is configured to move between different positions along the knife, changing the passage cross-sectional area dynamically. This allows the operator to adjust water pressure by simply moving the passage-forming portion to different positions, providing ease of operation without requiring complex pressure control mechanisms.
Solution Approach 2:
The invention changes the physical parameter of passage cross-sectional area to control water pressure. By moving the passage-forming portion to different positions, the cross-sectional area changes, which directly affects water flow rate and pressure, enabling different procedural steps (incision vs. injection) without complex control systems.
Data Source
AI summary
An endoscope treatment tool includes a sheath, a knife, a connecting unit and a body. The sheath includes a first channel opened at a distal end of the sheath. The knife inserted into the first channel, the knife having a second channel extending from a distal end of the knife to a proximal end of the knife. The connecting unit is located inside the sheath, the connecting unit including a cavity internal to the connecting unit and defining a storage path. A cross-sectional area of the cavity is larger than a cross-sectional area of the second channel. The body disposed in the cavity. The body is translatable in the cavity between a first position and a second position. The body forms a passage and, in the first position, the passage is in communication with the second channel.