Endoscopic Tissue Suturing Device with Frictional Stopper and Release Wire
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Solution Overview
Problem
Existing endoscopic tissue suturing and ligation devices face difficulties in easily releasing sutures or ligations, especially when the ligature is buried in tissue, making it troublesome to cut or remove without injuring the tissue.
Innovation Solution
A treatment device with a suturing-ligating member, a movable stopper for maintaining the sutured or ligated state, and a releasing member that allows for easy release by moving to the proximal end portion, utilizing a flexible wire and silicone tube to facilitate grasping and disengagement without harming the tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ligature is used to suture or ligate tissue, then the tissue can be securely held, but releasing the ligature becomes troublesome when it is buried in tissue
Solution Approach 1:
The device is divided into distinct functional segments: a ligating member (silicone tube) that secures the tissue, a separate releasing member (flexible wire with enlarged portion) that can be independently manipulated to解除 the ligation. This segmentation allows the ligature to remain secure during use while enabling easy release when needed.
Solution Approach 2:
The flexible wire with enlarged distal end acts as an intermediary between the operator and the ligating member. The enlarged portion serves as a grasping point that facilitates manipulation of the otherwise difficult-to-reach ligature, enabling easy release without directly manipulating the buried ligating member.
2Reliability
If a fixing member is designed to securely attach to tissue, then ligation stability is improved, but the fixing member becomes difficult to grasp and remove
Solution Approach 1:
The fixing system is segmented into the ligating member that provides stable attachment and the separate releasing member with enlarged distal end that provides easy grasping. This allows the fixing member to maintain stability during ligation while enabling simple removal through manipulation of the enlarged portion.
Solution Approach 2:
The releasing member has different local qualities: a thin flexible wire for navigating tissue spaces and an enlarged distal end for easy grasping. This local differentiation allows the device to provide both secure ligation and easy removal capabilities in different regions of the same component.
3Ease of operation
If forceps are used to cut or remove buried ligatures, then the ligature can be released, but tissue injury risk increases and operation complexity increases
Solution Approach 1:
The flexible wire with enlarged distal end serves as an intermediary that can be easily grasped by forceps and used to pull the ligating member off the tissue. This intermediary approach allows release of buried ligatures without directly manipulating the ligature near the tissue, reducing tissue injury risk while maintaining ease of operation.
Solution Approach 2:
The releasing member is extracted as a separate component from the ligating member, allowing it to be used as a dedicated tool for release operations. This extracted releasing member can be manipulated from a distance, removing the need to directly handle the buried ligature and reducing tissue injury risk.
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 simple and effective release of sutures or ligations under endoscopic observation, reducing the complexity of forceps operations and minimizing tissue injury during the release process.
Implementation Method 1
stoppable by friction on the suturing or ligating member to maintain the biological tissue in a sutured or ligated state
Implementation Method 2
release the suturing or ligation state maintained by frictional stopping between the suturing or ligating member and the fixing member by moving the releasing member to the proximal end portion side of the suturing or ligating member
Data Source
AI summary
A treatment device for endoscopic therapy of the present invention includes a suturing-ligating member having a distal end portion and a proximal end portion, that carries out at least one of suturing and ligation of biological tissue, a stopper provided to be movable forward or backward on an proximal end side of the suturing or ligating member, and stoppable by friction on the suturing-ligating member to maintain the biological tissue in a sutured or ligated state by the suturing-ligating member, and a suturing-ligation releasing member provided movable with relative to the suturing-ligating member to release the suturing-ligation state maintained by firctional stopping between the suturing-ligating member and the stopper by moving the releasing member to the proximal end portion side of the suturing-ligating member.