Endoscopic Clip Device Sliding Ring Mechanism
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Solution Overview
Problem
Current endoscopic systems face challenges in providing devices that can effectively cooperate with existing endoscopic systems, particularly in procedures requiring precise orientation and locking of medical instruments like wire guides and catheters within the gastrointestinal tract.
Innovation Solution
An endoscopic apparatus with a clip device that includes a delivery system comprising an operating wire, outer sheath, and a handle, featuring a sliding ring mechanism that uses the endoscope's elevator to deploy a hemostatic clip for securing tissue, allowing for precise placement and closure of the clip on targets within the body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a V-shaped groove elevator is used to guide and lock the distal end of the catheter or wire guide, then the orientation and locking function is achieved, but the device complexity increases and compatibility with different endoscopic systems is limited
Solution Approach 1:
The clip device is divided into separate functional components: the hemostatic clip itself, the delivery apparatus, and the operating wire mechanism. This segmentation allows each component to be optimized independently while maintaining compatibility with standard endoscopic elevators.
Solution Approach 2:
The delivery apparatus is designed to work with the standard V-shaped groove elevator found in many endoscopic systems, making the clip device universally compatible across different endoscopic platforms while maintaining reliable locking function through the elevator's existing structure.
2Manufacturing precision
If a dedicated clip delivery system is integrated into the endoscope, then the precision of clip placement is improved, but the adaptability to work with existing endoscopic systems decreases
Solution Approach 1:
The operating wire acts as an intermediary between the operator's manual control and the clip deployment mechanism. The wire transmits force and motion precisely while allowing the delivery apparatus to interface with standard endoscopic elevators, thus achieving both precision and compatibility.
Solution Approach 2:
The delivery apparatus incorporates dynamic elements such as the movable operating wire and flexible delivery catheter that allow precise control of clip placement while adapting to the varying geometries of different endoscopic systems' working channels and elevators.
3Ease of operation
If the arms of the hemostatic clip are made resilient and spaced apart, then the ease of insertion and tissue engagement is improved, but the structural strength decreases
Solution Approach 1:
The clip arms are designed as resilient (flexible) structures that can dynamically change shape: they are spaced apart during insertion to reduce profile and ease of engagement, then close together when actuated to provide strong clamping force. This dynamic behavior resolves the contradiction between insertion ease and structural strength.
Solution Approach 2:
The clip is pre-formed with arms in a spaced-apart configuration that facilitates easy insertion through the delivery catheter and engagement with tissue. Once positioned, the operating wire actuates the arms to close together, transforming the structure from an easy-to-insert open configuration to a strong clamping closed configuration.
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 effective hemostasis and tissue securing in the upper gastrointestinal tract by providing a reliable method for deploying and locking hemostatic clips, enhancing the precision and effectiveness of endoscopic procedures.
Implementation Method 1
The arms are formed of a resilient material and are shaped so that the arms tend to be spaced apart from each other. The sliding ring is configured to close the arms together as the elevator engages and moves the sliding ring toward the arms by retraction of the operating wire.
Data Source
AI summary
A hemostatic clip delivery system cooperable with an elevator of an endoscope and a method of treating a target with the system are disclosed. The system comprises a delivery apparatus comprising an operating wire, an outer sheath and a handle. The operating wire is cooperable with the elevator of the endoscope and slidably disposed within the outer sheath. The system further comprises a hemostatic clip cooperable with the delivery apparatus. The clip comprises a first retainer, a plurality of arms extending distally from the first retainer, and a sliding ring disposed about the plurality of arms. The arms are shaped so that the arms tend to be spaced apart from each other. The sliding ring is configured to close the arms together as the elevator engages and moves the sliding ring toward the arms by retraction of the operating wire.