Through-the-scope hemostatic clip release mechanism
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Solution Overview
Problem
Endoscopic hemostatic clipping devices face challenges in properly positioning and releasing hemostatic clips within the body, due to limited size and complexity in design, which can lead to ineffective bleeding control and increased procedure time.
Innovation Solution
A through-the-scope hemostatic clipping device with a handle assembly, shaft, and clip assembly that includes a control wire system providing user feedback for clip deployment and release, ensuring accurate positioning and full deployment of clips before withdrawal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional hemostatic clipping tool is used, then clips can be deployed to stop bleeding, but the operator cannot be certain of the clip deployment status and may require additional clips
Solution Approach 1:
The patent implements a feedback mechanism through a tactile indication system that provides real-time status information to the operator. A movable indicator component responds to clip deployment actions, giving tactile feedback that confirms when a clip has been successfully released from the tool. This eliminates uncertainty about deployment status and prevents the need for additional clips to be placed to ensure hemostasis.
2Length of moving object
If the clipping tool design is simplified to fit through the endoscope, then the tool can be inserted through the endoscope lumen, but the clip positioning and release mechanisms become constrained
Solution Approach 1:
The patent employs a nested structure where the clip assembly is contained within a capsule that is itself contained within the tool shaft. The clip positioning and release mechanisms are integrated within this nested arrangement, allowing complex functionality to be achieved within the constrained outer diameter required for endoscope passage.
Solution Approach 2:
The patent introduces a control wire as an intermediary element that transmits operator input from the proximal end of the tool to the clip release mechanism at the distal end. This allows the operator to control clip deployment without direct mechanical connection, simplifying the overall structure while maintaining functional complexity where needed.
3Reliability
If multiple clips are deployed to ensure effective bleeding control, then hemostasis is achieved, but the complexity of the procedure and number of medical devices increase
Solution Approach 1:
The tactile feedback mechanism confirms successful clip release to the operator, providing confidence that each deployed clip is functioning properly. This reduces the tendency to deploy additional clips as a precautionary measure, thereby reducing the total number of devices while maintaining effective bleeding control.
Data Source
AI summary
An apparatus for deployment of a hemostatic clip includes a clip assembly releasably coupled to a distal portion of a shaft, wherein the clip assembly includes a capsule releasably coupled to the shaft, clip arms slidably received within the capsule and cooperating with the capsule to provide a first user feedback indicating a decision configuration of the clip assembly and a yoke slidably received within the capsule, the yoke including proximal and distal portions releasably and rotatably connected to one another via a first control wire, a distal end of the distal portion being connected to proximal ends of the clip arms. A second control wire extends from the handle assembly and is coupled to a proximal end of the second portion to move the clip assembly between open and closed configurations.