Clip Unit Thread Grip for Mucous Membrane Traction Force Adjustment
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Solution Overview
Problem
Current mucous membrane traction tools face difficulties in adjusting traction force and size during submucous membrane peeling in endoscopic procedures due to limited space and the fixed restoring force of elastic portions, making it challenging to effectively capture and lift the mucous membrane within the endoscope's field of view.
Innovation Solution
A clip unit with openable and closeable arms, featuring a thread grip that can be elastically deformed to securely hold and adjust the traction force, allowing for flexible manipulation of the mucous membrane lifting by utilizing a thread sandwiched between the arms, which generates a frictional force to maintain the lifted state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a mucous membrane traction tool with an elastic portion is used, then the mucous membrane can be pulled up, but the amount of traction force cannot be adjusted because it is defined by the fixed restoring force of the elastic portion
Solution Approach 1:
The clip unit employs movable arms that can be opened and closed to sandwich the thread, replacing the fixed elastic portion with a dynamic mechanical system. The arms can be positioned at different distances from each other, allowing the traction force to be adjusted by changing the arm configuration rather than relying on a fixed elastic restoring force.
Solution Approach 2:
The traction force is controlled by changing the physical parameters of the arm configuration - specifically the distance between the arms and the position of the thread grip. By adjusting these parameters, the operator can control the amount of traction force applied to the mucous membrane.
2Device complexity
If a mucous membrane traction tool with fixed arm length is used, then the structure is simple, but the distance between the mucous membrane to be incised and another mucous membrane cannot be made shorter than the length of the retractor
Solution Approach 1:
The arms are designed to be movable relative to each other, allowing the effective length of the retractor to be adjusted. The arms can be opened wider or closed tighter depending on the distance required, providing adaptability to different anatomical configurations while maintaining a relatively compact overall structure.
Solution Approach 2:
The retractor is divided into separate movable arms rather than a single fixed structure. This segmentation allows each arm to be positioned independently, enabling the operator to adjust the effective length and configuration to match the specific distance requirements of the surgical site.
3Volume of moving object
If the first arm and second arm are kept close together to reduce size, then the thread grip space is limited, but the thread grip needs sufficient space to securely hold the thread
Solution Approach 1:
The thread grip is designed to be movable along the arms, allowing it to be positioned at the optimal location for securing the thread. The thread grip can slide to accommodate different thread positions while the arms maintain their compact configuration, ensuring both small size and effective thread gripping.
Solution Approach 2:
The thread grip acts as an intermediary component between the arms and the thread. It provides a dedicated interface for securing the thread with sufficient surface area and friction, while being mounted on the compact arm structure, thus resolving the conflict between small size and effective gripping capability.
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 easy adjustment of traction force and size during mucous membrane peeling, improving operational efficiency and reducing the complexity of submucous membrane peeling by allowing precise control over the lifting and peeling process.
Implementation Method 1
The thread grip can be elastically deformed when the first arm and the second arm are in the closed state
Implementation Method 2
The thread grip can be elastically deformed when the first arm and the second arm are in the closed state
Data Source
AI summary
A clip unit includes: an arm portion including arms extending from a proximal end portion to a distal end portion so as to be openable and closeable; a holder than can hold the arms in a closed state by accommodating the proximal end portion of the arm portion; and a thread grip attached to at least one of the arms and positioned between the arms. In a state where the arms are spread open, a dimension of the thread grip in the opening/closing direction of the arms is equal to or larger than a distance between the arms in the closed state. The thread can be elastically deformed in the closed state.