Tissue Clip Grasper With Spring-Biased Jaws for ESD Retraction
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Solution Overview
Problem
Current medical procedures, such as endoscopic submucosal dissection (ESD), face challenges with inefficient tissue retraction and visualization due to complex device manipulation and lack of adequate traction force, leading to prolonged procedure times and potential errors.
Innovation Solution
The development of tissue clip devices with a grasper and spring portion that biases jaws together, featuring a wedge and filament system, allowing for easy deployment and repositioning of clips to enhance tissue engagement and visualization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional tissue retraction methods are used, then procedure complexity and time increase, but tissue visualization and traction force remain inadequate
Solution Approach 1:
The tissue clip device is divided into distinct functional segments: the grasper portion with jaws for tissue engagement, the spring portion for providing biasing force, and the filament for actuation. This segmentation allows each component to perform its specific function efficiently, reducing overall procedural complexity while improving tissue retraction capability
Solution Approach 2:
The tissue clip device is designed to be nested within a delivery catheter system. The grasper and spring portion are contained within the catheter lumen during delivery, and the filament extends through the catheter for actuation. This nesting approach simplifies the overall system configuration and reduces manipulation complexity during the procedure
2Illumination intensity
If more traction force is applied to improve tissue visualization, then device complexity increases, but procedure time may be reduced
Solution Approach 1:
The spring portion of the tissue clip device automatically provides biasing force to maintain jaw separation and tissue engagement without requiring additional actuation mechanisms. This self-service feature generates the necessary traction force passively, improving tissue visualization while avoiding increased device complexity
Solution Approach 2:
The spring portion is designed with specific mechanical properties (spring constant, wire diameter, coil spacing) that determine the biasing force magnitude. By optimizing these parameters, adequate traction force is achieved for improved tissue visualization without requiring complex active control systems
3Manufacturing precision
If precise device positioning is required for accurate tissue clipping, then procedure time increases, but clipping precision is improved
Solution Approach 1:
The tissue clip device is pre-loaded into the delivery catheter in a ready-to-deploy configuration. The grasper, spring portion, and filament are all positioned and prepared before reaching the target tissue site. This preliminary action eliminates time-consuming positioning adjustments during the procedure while maintaining precise clipping accuracy
Solution Approach 2:
The filament actuation system replaces complex mechanical positioning mechanisms. By pulling the filament, the jaws are opened in a controlled manner without requiring intricate mechanical linkages or adjustment mechanisms, thereby reducing positioning time while maintaining precision
4Ease of manufacture
If reusable tissue clip devices are used, then cost is reduced, but sterilization complexity and time increase
Solution Approach 1:
The tissue clip device is designed as a disposable single-use component that is discarded after one use. This eliminates the need for complex sterilization processes and associated validation requirements, while keeping manufacturing costs low through standardized production of simple components
Solution Approach 2:
The tissue clip device is designed as a disposable single-use component that is discarded after one use. This eliminates the need for complex sterilization processes and associated validation requirements, while keeping manufacturing costs low through standardized production of simple components
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 solution provides improved tissue retraction and visualization, reducing procedure complexity and time by facilitating efficient clipping and repositioning of tissue, thereby enhancing the precision and efficiency of medical procedures.
Implementation Method 1
A spring portion may be at a second end. The grasper may extend a length from the first end to the second end along a longitudinal axis. The spring portion may be configured to bias the jaws toward each other.
Implementation Method 2
A wedge may be slidably disposed between the jaws. An apex of the wedge may be oriented toward the spring portion.
Data Source
AI summary
The present disclosure pertains to medical devices. More particularly, the present disclosure pertains to tissue clip devices and related systems and methods. In an embodiment, a tissue clip may include a grasper including jaws at a first end, and a spring portion at a second end, and a longitudinal axis extending along a length of the grasper from the first end to the second end, wherein the spring portion is configured to bias the jaws toward each other. A wedge may be slidably disposed between the jaws such that an apex of the wedge is oriented toward the spring portion. A filament may be coupled to the wedge at a first end of the filament and may extend through a channel of the spring portion of the grasper to a second end of the filament.