Tissue Traction Structure for Closing Large Endoscopic Openings
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Solution Overview
Problem
Existing endoscopic procedures for closing large tissue deficiencies or openings in the stomach wall, such as those created by ESD or EFTR, are cumbersome due to the need for multiple thread hooks and significant movement, especially when the opening is large, making it difficult to effectively close the area with conventional devices.
Innovation Solution
A tissue traction device with a first and second needle connected to threads, an elongated main body, and a tube, allowing for relative movement between the tube and second thread to elongate and gather surrounding tissues, facilitating easier closure of the opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a thread is hooked at two sites of surrounding tissue around a large opening and pulled to close the opening, then the opening can be closed, but the movement amount of the needle becomes large and the procedure becomes difficult
Solution Approach 1:
The patent introduces a tube as an intermediary device that receives and guides the thread. The tube allows the thread to be pulled through a fixed path, eliminating the need for large needle movements. The tube acts as a mediator between the threading needle and the tissue, enabling efficient thread manipulation without requiring the needle to travel large distances through tissue.
2Ease of operation
If multiple clips are used to close a large opening, then the opening can be closed, but the arm becomes slippery with respect to tissue and reaction force is generated
Solution Approach 1:
The tube serves as an intermediary that guides the thread through a controlled path, reducing the need for direct manipulation of slippery tissue by the arm. This mediator structure minimizes reaction forces by providing a stable guide path for the thread, eliminating the friction and slippage problems associated with direct arm-tissue interaction.
3Area of stationary object
If the opening area is large, then more thread hooks are necessary, but the procedure becomes more complex and time-consuming
Solution Approach 1:
The tube provides a universal solution that works for openings of various sizes. Instead of requiring multiple thread hooks for larger openings, the tube allows a single thread to be effectively managed through its guided path. The tube's multi-functional design enables it to guide, support, and constrain the thread, replacing the need for multiple hooks regardless of opening size.
Data Source
AI summary
A tissue traction device includes a first needle connected to a distal end of a first thread; a second needle connected to a distal end of a second thread; an elongated main body connected to the first thread and extending between the first thread and the second thread, the main body including a first hole; and a tube disposed at a proximal end of the main body, wherein the second thread is inserted through the first hole to be advanceable and retractable at a position between the second needle and a distal end of the tube, and the tube and the second thread are configured to be relatively movable in a longitudinal direction of the tube.