Tissue Collecting Tool Bag Opening Width Adjustment
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Solution Overview
Problem
Existing tissue collection methods using endoscopes are inefficient in collecting and removing pathologic tissues like tumors, as they require manual grasping and handling, which can be cumbersome and risk tissue damage or loss during extraction.
Innovation Solution
A tissue collecting tool with a bag part and a linear member that can be opened and closed to accommodate tissues, featuring a wire part for adjustable opening width, allowing for easy collection and protection of tissues during removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual grasping forceps are used to collect tissue, then the tissue can be removed from the body, but the tissue may be damaged or lost during extraction and the process is cumbersome
Solution Approach 1:
The collecting tool is divided into distinct functional segments: a bag part for containing tissue, a linear member for actuation, and a wire part for opening control. This segmentation allows each component to perform its specific function efficiently, reducing the complexity of manual manipulation required in conventional forceps-based methods
Solution Approach 2:
The bag part is designed to be insertable into the channel of the flexible endoscope, and the linear member is inserted into the lumen of the main body. This nested configuration allows the collecting tool to be delivered through the endoscope system and deployed at the target site without requiring separate access routes or complex external manipulation
2Adaptability or versatility
If a fixed-size collecting tool is used, then the structure is simple, but it cannot accommodate various tissue sizes
Solution Approach 1:
The wire part is configured to be capable of raising from the fixing portion as a starting point by a movement of the linear member with respect to the main body in a direction of a longitudinal axis of the main body. This dynamic mechanism allows the opening width to be adjusted during the procedure to match the size of the tissue being collected, rather than being fixed at a single dimension
Solution Approach 2:
The opening width of the opening portion is configured to be adjustable by a movement of the wire part with respect to the main body in the direction of the longitudinal axis. By changing the positional parameter of the wire part along the longitudinal axis, the tool can adapt to collect tissues of varying sizes without requiring multiple different tool configurations
3Ease of manufacture
If the opening portion is positioned closer to the proximal end, then the bag part structure is simplified, but the collection efficiency at the distal end may be reduced
Solution Approach 1:
The opening portion is positioned closer to the proximal end of the bag part than the bottom portion, creating a specific spatial quality distribution within the bag part. This positioning allows the opening to be accessible for tissue insertion while the bottom portion extends distally to reach the target site, combining manufacturing simplicity with collection efficiency through differentiated regional functionality within the same component
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
Enables efficient and secure collection of tissues by adjusting the opening width of the bag part to accommodate various tissue sizes, preventing damage and ensuring complete removal without contact with surrounding tissues.
Implementation Method 1
the wire part which is capable of being elastically transformed
Implementation Method 2
a linear member which is connected to the opening portion and the operation part and which is configured to raise the opening portion by being moved in a longitudinal direction of the main body
Data Source
AI summary
A tissue collecting tool includes: a main body that is long; an operation part arranged on a proximal end side of the main body; a bag part including a bottom portion and an opening portion and having a part of the opening portion fixed to the main body such that the opening portion is positioned on a further proximal end side than the bottom portion; and a linear member connected to the opening portion and the operation part and raising the opening portion by being moved in a longitudinal direction of the main body.