Endoscope Knife Passage Switching for Incision and Injection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing endoscopic treatment tools face challenges in efficiently performing both high-frequency incision and local injection tasks with a single tool, particularly in adjusting the water pressure for physiological saline solution discharge during Endoscopic Submucosal Dissection (ESD), necessitating tool changes for different procedures.
Innovation Solution
The endoscope treatment tool features a sheath with a knife and a passage-forming portion that translates between positions to adjust the cross-sectional area of the passage, allowing for high or low water pressure discharge without tool exchange, enabling both incision and injection steps with a single tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single treatment tool is used for both high-frequency incision and local injection, then tool versatility is improved, but the ability to adjust water pressure for different procedures deteriorates
Solution Approach 1:
The passage-forming portion is designed to be movable between a first position (for high-pressure discharge during incision) and a second position (for low-pressure discharge during injection). This dynamic repositioning allows the single tool to adapt its fluid discharge characteristics to match different procedural requirements, resolving the contradiction between versatility and operational ease.
Solution Approach 2:
The treatment tool is segmented into distinct functional components: a knife portion for incision and a passage-forming portion for fluid discharge. The passage-forming portion is further divided into multiple passages (first and second passages) that can be selectively activated by positioning, allowing independent control of fluid discharge paths and pressures for different procedures.
2Reliability
If multiple treatment tools are used for different procedures, then procedural specialization is improved, but device complexity and tool exchange requirements worsen
Solution Approach 1:
The invention merges multiple specialized tools into a single integrated treatment tool. The knife portion and passage-forming portion with multiple passages are combined in one device, allowing both high-frequency incision and local injection procedures to be performed with a single tool, thereby reducing device complexity and eliminating tool exchange requirements while maintaining procedural specialization.
Solution Approach 2:
The treatment tool is designed with universal functionality to perform multiple procedures. The knife can perform high-frequency incision, while the passage-forming portion with its multiple passages can perform both local injection (low-pressure) and blood washing (high-pressure). This multi-functionality eliminates the need for separate specialized tools.
3Ease of manufacture
If the passage cross-sectional area is fixed, then manufacturing simplicity is improved, but the ability to adjust discharge pressure for different procedures worsens
Solution Approach 1:
Instead of creating passages with different fixed cross-sectional areas, the invention uses a dynamic approach where the passage-forming portion can be repositioned between first and second positions. This allows the same passages to effectively provide different flow characteristics for high-pressure and low-pressure discharge, maintaining manufacturing simplicity while achieving pressure adaptability.
Solution Approach 2:
The invention resolves the pressure adjustment requirement not by varying passage cross-sectional area (two-dimensional approach), but by introducing a positional dimension. The passage-forming portion's movement between first and second positions along the longitudinal axis enables different discharge pressures without complicating the passage cross-sectional design.
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.