Two-Part Hemostasis Clip Arms for Tight-Space GI Deployment
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Solution Overview
Problem
Current hemostatic clips are large and difficult to navigate through tight areas, making it challenging to deploy additional clips near already treated sites within the gastrointestinal tract.
Innovation Solution
A two-part arm design with a capsule that allows the proximal portions of the clip arms to be disengaged from the distal portions after deployment, reducing the clip size and enabling easier navigation, and a smaller capsule design to maintain the distal portions in the clipped configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If current hemostatic clips use a capsule design long enough to contain the full length of tissue gripping arms, then the clips can maintain proper arm configuration during deployment, but the clips become large and difficult to navigate in tight areas
Solution Approach 1:
The clip arm is divided into two separate parts: a proximal part that remains outside the body after deployment and a distal part that is retained within the capsule. This segmentation allows the capsule to be shorter while still maintaining the functional length of the clip arms during deployment, resolving the contradiction between configuration stability and navigable size.
Solution Approach 2:
The proximal part of the clip arm is extracted from the capsule after deployment. This extraction allows the capsule to be shortened for better navigation while the full-length clip arms are still available during the deployment process, addressing both the need for proper arm configuration and reduced clip size for navigation.
2Area of moving object
If current clips are made large to contain full-length gripping arms, then the arms can effectively close larger injured areas, but it becomes difficult to place additional clips near already treated sites
Solution Approach 1:
By segmenting the clip arm into proximal and distal parts with only the distal part retained in the capsule, the overall clip size is reduced. This allows multiple clips to be placed in close proximity to each other along the gastrointestinal tract, enabling treatment of multiple bleeding sites without the clips interfering with each other.
3Length of moving object
If the capsule is shortened to improve navigation, then the device can access tight areas more easily, but the mechanism to maintain arm configuration during deployment becomes more complex
Solution Approach 1:
The segmentation of the clip arm into proximal and distal parts simplifies the capsule design, allowing it to be shorter while still containing the necessary distal portion for tissue engagement. The proximal part is released and removed after deployment, eliminating the need for a long capsule to accommodate the entire arm length.
Solution Approach 2:
The proximal part of the clip arm is discarded after serving its purpose during deployment. This allows the capsule to be shorter since it only needs to retain the distal part that remains in the body, reducing the complexity of the deployment mechanism while maintaining proper arm 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
The design facilitates easier deployment of hemostatic clips in tight spaces, allowing for efficient treatment of multiple bleeding sites within the gastrointestinal tract.
Implementation Method 1
The capsule includes a cam extending into the channel, the cam being sized and shaped to extend through a first longitudinal slot of the proximal part to releasably couple the clip arms to the capsule
Implementation Method 2
the first longitudinal slot defining a first pair of opposing portions biased toward one another
Implementation Method 3
the coupling mechanism includes a hook extending distally from an outer surface of the distal portion, the hook being removably received within a hook receiving space of the proximal part
Data Source
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AI summary
A device (100) for treating tissue includes a capsule (108) defining a channel (106) extending therethrough and clip arms (104). Each of the arms (104) includes a proximal part (120) releasably coupled to a distal part (122), a proximal portion of the distal part (122) configured to be received within the channel (106) of the capsule (108) so that the arms (104) move proximally and distally relative to the capsule (108) between a tissue receiving configuration, in which distal ends (110) of the arms (104) are separated from one another, and a tissue clipping configuration, in which the distal ends (110) of the arms (104) are moved toward one another. The proximal part (120) of each of the arms (104) is configured to release from the corresponding distal part (122) to lock the distal part (122) of each of the arms (104) over a portion of target tissue to be clipped while the proximal parts (120) of the arms (104) are removed from the body.