Endoscopic Forceps Fluid Path Switching for Bleeding Control
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Solution Overview
Problem
Existing endoscopic surgical devices face challenges in efficiently delivering liquids and performing multiple surgical functions, such as dissection and bleeding control, due to limitations in liquid delivery pathways and the need for multiple device insertions during procedures.
Innovation Solution
An endoscopic surgical device with a sheath and forceps section that includes a flow-path formation member with dual liquid delivery holes and an operable member that adjusts liquid flow based on forceps position, allowing for high-flow rate delivery when closed and focused delivery when open, and enabling functions like high-frequency cutting and gripping without requiring device removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single liquid delivery pathway is used, then the device structure is simple, but the liquid delivery efficiency and functional versatility are limited
Solution Approach 1:
The liquid delivery system is segmented into two separate pathways: a first liquid delivery hole for high-flow rate delivery and a second liquid delivery hole for focused delivery. This segmentation allows the device to perform multiple surgical functions (dissection, bleeding control, irrigation) with different liquid flow requirements, thereby improving functional versatility without requiring multiple separate devices
Solution Approach 2:
The forceps component is designed to perform multiple functions: it can grip tissue, block the first liquid delivery hole to redirect flow, and serve as a cutting edge for high-frequency dissection. This multi-functionality allows a single device to replace multiple separate surgical instruments, improving adaptability while maintaining reasonable structural complexity
2Productivity
If liquid is delivered at high flow rate, then bleeding control efficiency is improved, but the liquid delivery pathway requires larger diameter which limits precision
Solution Approach 1:
The liquid delivery system is divided into two pathways with different characteristics: the first liquid delivery hole provides high flow rate for efficient bleeding control, while the second liquid delivery hole provides focused, precise delivery. This segmentation resolves the contradiction by allowing both high-flow and precision delivery functions to coexist in the same device
Solution Approach 2:
Different regions of the liquid delivery system are designed with different qualities: the first liquid delivery hole has larger diameter for high flow rate, while the second liquid delivery hole has smaller diameter for precision. The forceps component also exhibits local quality by blocking different holes at different positions to achieve different delivery patterns
3Productivity
If multiple surgical functions are integrated, then procedural efficiency is improved, but the device complexity increases
Solution Approach 1:
Multiple surgical functions are merged into a single integrated device: the forceps component combines gripping, blocking, and cutting functions; the dual liquid delivery system combines high-flow and precision delivery capabilities. This merging allows all functions to be performed with a single device insertion, improving procedural efficiency
Solution Approach 2:
The forceps component is designed as a universal element that can perform multiple functions: it can grip tissue for retraction, block the first liquid delivery hole to redirect flow to the second hole for precision delivery, and serve as a cutting edge for high-frequency dissection. This multi-functionality reduces the need for multiple separate instruments
Data Source
AI summary
An endoscopic surgical device includes: a sheath; a forceps section protruding from a cover provided at a distal end of the sheath and including a pair of openable-closable forceps components; an operable member that is connected to a proximal end of the forceps section, that opens the forceps components when moved forward in a longitudinal direction, and that closes the forceps components when moved rearward; and a flow-path formation member having a through-hole through which the operable member extends and having a first liquid delivery hole constituted by a gap between the through-hole and the operable member and a second liquid delivery hole constituted by a gap between the flow-path formation member and an inner peripheral surface of the cover. The operable member is provided with a large-diameter section that abuts on the flow-path formation member when the operable member is moved forward to block the first liquid delivery hole.