Endoscopic Clip Applicator With Wire Resistance Control
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Solution Overview
Problem
Existing clip systems for endoscopic treatments face issues with unintentional detachment of clips during manipulation, making them difficult to reload and operate reliably.
Innovation Solution
A clip system with a sheath, operation body, wire, handle, and obstruction mechanism that provides sliding resistance to prevent unwanted detachment and facilitate easy gripping, release, and re-gripping operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the clip is placed in the open state to grip excised tissue, then the clip can securely hold the tissue, but the connector portion of the applicator can be unintentionally moved to a position where the clip apparatus may be detached from the connector portion
Solution Approach 1:
An obstruction member is introduced as an intermediary component between the wire and the connector portion. This obstruction member prevents the wire from accidentally moving to a position that would cause unintentional detachment of the clip apparatus from the connector portion, while still allowing controlled operation of the clip
2Ease of operation
If the wire is allowed to move freely in the sheath, then the clip can be easily opened and closed, but the clip apparatus may be unintentionally detached from the connector portion
Solution Approach 1:
The obstruction member serves as a mediator that constrains the wire's movement within the sheath. It allows the wire to move sufficiently to enable clip opening and closing operations while preventing excessive movement that would cause unintentional detachment of the clip apparatus from the connector portion
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
The system allows for reliable and easy manipulation of clips, preventing unintended detachment and ensuring secure gripping and release, enhancing operational efficiency during endoscopic procedures.
Implementation Method 1
an obstruction attached to the wire and configured to generate a sliding resistance to the wire
Data Source
AI summary
A system, comprises a sheath, an operation body attached to the sheath, the operation body including a first wall, a clip configured to be inserted in and protruded from the sheath, the clip including a pair of arms, a wire inserted in the sheath, the wire including a first end and a second end, the first end attached to the clip, a handle attached to the second end and configured to move the wire against the operation body, the handle configured to open and close the pair of arms via the wire, and an obstruction attached to the wire and configured to generate a sliding resistance to the wire. The handle is configured to change a configuration of the clip between a first configuration and a second configuration. In the first configuration, the obstruction and the wire are placed in a relative position, the handle opens the arms, and the obstruction contacts the first wall. In the second configuration, the obstruction and the wire maintain the relative position, the handle closes the arms, and the obstruction is spaced apart from the first wall.