Multi-Arm Endoscopic Clip Closure for Secure Tissue Ligation
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Solution Overview
Problem
Existing endoscopic treatment devices face challenges in efficiently and effectively ligating resection portions within luminal cavities using clips, as they often require complex slider operations and may not securely grasp and indwell tissues.
Innovation Solution
A clip device with a fixed arm and two movable arms, each with claws, allows independent opening and closing to grasp tissue portions, and a stopper mechanism for secure indwelling, facilitating simplified and effective tissue closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a clip device with multiple movable arms and sliders is used to grasp and ligate tissue, then the ligation capability is improved, but the device complexity increases
Solution Approach 1:
The clip device is divided into a fixed arm and multiple movable arms (first movable arm and second movable arm), each capable of independent operation. This segmentation allows each arm to independently grasp different portions of tissue, improving ligation capability while maintaining manageable complexity through modular design
Solution Approach 2:
The multiple movable arms are designed to perform the same grasping function but operate independently to handle different tissue portions. This multi-functionality allows a single device to secure complex tissue structures that require multiple grasp points, enhancing reliability without proportionally increasing complexity
2Reliability
If independent control of multiple movable arms is implemented, then the grasping effectiveness is improved, but the ease of operation deteriorates
Solution Approach 1:
The control mechanism is segmented into independent slider systems for each movable arm, allowing surgeons to control each arm separately. This independent control enables precise grasping of multiple tissue portions simultaneously, improving grasping effectiveness while maintaining operational simplicity through dedicated control elements
Solution Approach 2:
The stopper mechanism automatically locks the movable arms in their desired positions once the sliders are moved, providing self-service functionality. This reduces the operational burden on the surgeon by eliminating the need for continuous active control, thereby improving ease of operation while maintaining effective tissue grasping
3Productivity
If the clip device is designed to indwell only the ligated portion, then the productivity is improved, but the reliability of tissue securation worsens
Solution Approach 1:
The movable arms are designed to be nestable within the fixed arm or each other during the indwelling process. This nesting capability allows the device to be collapsed into a compact form for easy insertion into the luminal cavity, improving productivity by enabling quick deployment of only the necessary ligated portion while maintaining secure tissue hold through the clipped structure
Solution Approach 2:
The excess or non-essential portions of the device structure are extracted or removed to allow selective indwelling of only the ligated tissue portion. This extraction approach enables the device to leave the body with minimal burden while ensuring the critical tissue securation function is maintained through the permanently deployed clip structure
Data Source
AI summary
A tissue closure method comprises grasping a first portion of a tissue between a first arm and a central arm, restricting a sliding of a first slider while grasping the first portion, the first slider configured to open and close the first arm relative to the central arm, grasping a second portion of the tissue between a second arm and the central arm while restricting the sliding of the first slider, indwelling the first arm, the second arm, and the central arm in a body.