Deformable Retraction Strip for Endoscopic Submucosal Dissection
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Solution Overview
Problem
The lack of a second hand to provide traction and counter-traction during endoscopic submucosal dissection (ESD) complicates the procedure, making it less efficient.
Innovation Solution
A tissue retraction device with a deformable retraction strip body that can be selectively moved between engaging and retracting patient tissue, equipped with tissue engagement members, is used in conjunction with an endoscope to facilitate submucosal dissection by providing controlled traction and counter-traction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional endoscopic surgery is performed without additional retraction devices, then the procedure is simpler in terms of device complexity, but the efficiency and precision of tissue dissection deteriorates due to lack of traction and counter-traction
Solution Approach 1:
The retraction strip is integrated with the endoscope shaft, combining the functions of endoscopic visualization and tissue retraction into a single unified device. This eliminates the need for separate retraction instruments while maintaining procedural efficiency.
Solution Approach 2:
The endoscope serves dual purposes: as a diagnostic/visualization tool and as a platform for delivering retraction functionality through the integrated retraction strip mechanism, reducing the need for multiple specialized devices.
2Force
If a rigid retraction device is used, then the retraction force and control are improved, but the ability to navigate through the endoscope lumen and adapt to tissue geometry deteriorates
Solution Approach 1:
The retraction strip is constructed as a flexible, elongated element that can bend and conform to the curvature of the endoscope shaft and the geometry of the tissue being retracted, while still providing sufficient retraction force when engaged.
Solution Approach 2:
The retraction strip transitions from a flexible, navigable state during insertion to a more rigid, force-applying state when engaged with the tissue, allowing it to adapt to different operational requirements within the procedure.
3Adaptability or versatility
If the retraction strip body is made from a highly deformable material, then the ability to navigate through the endoscope lumen and conform to tissue is improved, but the retraction force and structural stability deteriorate
Solution Approach 1:
The retraction strip body is made from a composite or specially engineered material that combines flexibility for navigation with sufficient structural strength to provide effective retraction force when engaged with the tissue.
4Manufacturing precision
If tissue engagement members are added to the retraction strip, then the precision of tissue engagement and retraction control is improved, but the device complexity and difficulty of insertion deteriorate
Solution Approach 1:
The retraction strip is divided into functional segments, with tissue engagement members positioned at specific locations along the strip body, allowing for precise tissue engagement while maintaining a relatively simple overall structure.
Data Source
AI summary
Systems, methods, and apparatuses for assisting with submucosal dissections include a retraction strip body. The retraction strip body is formed at least partially from a deformable material. The retraction strip body is capable of being selectively moved between a first condition and a second condition. In the first condition, the retraction strip body is capable of engaging a target patient tissue. In the second condition, the retraction strip body is capable of retracting the target patient tissue. At least one tissue engagement member is located on the retraction strip body.