Fixed-Jaw Endoscopic Closure Clip for Large Tissue Defects
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Solution Overview
Problem
Conventional endoscopic tissue closure devices are insufficient for closing large tissue defects and may increase the risk of perforating or damaging the GI tract during aggressive interventional procedures.
Innovation Solution
An endoscopic clipping device with a first arm rigidly fixed to a capsule and a second arm slidably housed within, allowing movement between open and closed configurations to grasp and close large tissue defects, featuring compliant materials and precise Nitinol arm formation through a die assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional endoscopic tissue closure devices are used, then the procedure can be performed endoscopically, but the devices are insufficient to close large tissue defects and may increase the risk of perforating or damaging the GI tract
Solution Approach 1:
The closure device is divided into multiple independent arms (first arm and second arm) that can be moved and positioned separately. Each arm can be independently adjusted to grasp tissue edges, allowing the device to accommodate larger tissue defects while maintaining control and reducing the risk of perforation through precise, segmented manipulation rather than a single rigid structure
Solution Approach 2:
The device incorporates dynamic movement capabilities where the first and second arms can be moved between different positions and configurations. The arms can be advanced, retracted, and adjusted to adapt to the specific anatomy and size of the tissue defect, enabling reliable closure of large defects while minimizing harmful forces on the GI tract wall
2Adaptability or versatility
If the second arm is made movable between open and closed configurations, then the device can grasp and close tissue defects, but the device complexity increases
Solution Approach 1:
The second arm is slidably received within the capsule, creating a nested configuration where one component fits inside another. This nesting allows the arms to be compact when not in use while enabling easy extension and movement between configurations, achieving high adaptability without proportionally increasing external device complexity
Solution Approach 2:
The capsule serves as a flexible housing that accommodates the movable second arm. The flexible nature of the capsule allows it to bend and conform within the body while providing a protected pathway for the arm to move between configurations, reducing the need for complex external mechanical structures
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
Effectively closes large tissue defects by approximating tissue edges, reducing the risk of perforation and providing secure closure with precise geometric control.
Implementation Method 1
forming a superelastic Nitinol arm for a tissue clipping device
Data Source
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AI summary
A device includes a capsule extending longitudinally from a proximal end to a distal end and including a channel extending therethrough. The capsule is releasably coupled to a proximal portion of the device. Device also includes a first arm rigidly fixed to the distal end of the capsule to extend distally therefrom. In addition, Device includes a second arm, a proximal end of which is slidably received within the capsule so that the second arm is movable between an open configuration, in which the second arm is moved laterally away from the first arm and a distal end of the second arm is moved distally past the distal end of the first arm, and a closed configuration, in which the second arm is moved toward the first arm and the distal end of the second arm is moved proximally toward the distal end of the first arm.