Endoscope Snare Trap Integration for Tissue Capture
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Solution Overview
Problem
Existing endoscope systems face challenges in efficiently separating and gathering tissue from body cavities while minimizing tissue damage and requiring separate preparation and operation of snare and trap components.
Innovation Solution
An endoscope system with an integrated high-frequency snare and trap portion that allows for simultaneous cutting and suction of tissue, using a detachable trap portion connected to the endoscope's suction duct, which reduces tissue loss and facilitates preparation by combining snare and trap functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate snare and trap components are used, then each component can be optimized independently, but the device complexity increases and preparation becomes more difficult
Solution Approach 1:
The patent combines the snare and trap into a single integrated accessory that can be attached to the endoscope. The snare is positioned at the distal end while the trap is located proximal to it, both within the same accessory structure. This integration eliminates the need for separate preparation and handling of multiple components, directly resolving the contradiction between ease of manufacture and device complexity.
Solution Approach 2:
The integrated accessory serves multiple functions: the snare performs tissue cutting while the trap simultaneously captures and holds the cut tissue. This multi-functionality within a single component reduces the number of separate devices needed, addressing the contradiction by providing both specialized optimization and simplified preparation.
2Ease of operation
If the trap is fixed to the endoscope, then tissue capture is stable, but the snare movement freedom is restricted
Solution Approach 1:
The accessory is segmented into distinct functional portions: the snare at the distal end for cutting and the trap proximal to it for capture. This segmentation allows each component to perform its function independently - the snare can move freely to reach and cut tissue while the trap remains positioned to capture the cut tissue, resolving the contradiction between movement freedom and capture stability.
Solution Approach 2:
The snare is positioned within the accessory structure such that it can extend distally for cutting while the trap portion remains proximal. This nested arrangement allows the snare to have movement freedom for its cutting function while the trap maintains its stable position for capture, effectively resolving the contradiction.
3Length of stationary object
If a long suction path is used, then tissue can be gathered further from the body cavity, but tissue damage increases during suction
Solution Approach 1:
The trap is positioned proximal to the snare within the accessory, creating an intermediate capture point closer to the cutting site. Tissue is captured by the trap immediately after cutting, before being subjected to a longer suction path. This preliminary capture action reduces the distance tissue must be suctioned, thereby minimizing damage while still allowing gathering from the body cavity.
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 system enhances suction and gathering efficiency, improves operability by allowing the snare to move freely within the body cavity, and simplifies preparation by eliminating the need for separate snare and trap components, while preventing unnecessary movement of the snare when not in use.
Implementation Method 1
a high-frequency current is passed through the loop to cut the polyp, the mucosal tissue or the like
Implementation Method 2
the tissue is sucked and gathered into the suction bottle via the suction passage
Data Source
AI summary
An endoscope of an endoscope system includes a channel of which a distal end forms a distal opening at a distal end of an insertion portion, of which a proximal end forms a proximal opening at an operating portion, and used for at least suction, and a suction duct of which a distal end forms a suction opening at the operating portion and of which a proximal end is connected to a suction device. An endoscopic accessory includes a capture portion to be connected to an accessory insertion portion and detachably attached to the operating portion of the endoscope, and the capture portion includes a communication path to communicate the proximal opening with the suction opening when the capture portion is attached to the endoscope, and a capture unit interposed in the communication path and to capture the tissue being sucked from the channel into the suction duct.