Endoscopic Traction and Cutting Tools for Precise Tissue Resection
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Solution Overview
Problem
Endoscopic procedures face challenges in applying traction or tension to lesions or body lumens to facilitate medical procedures such as endoscopic submucosal dissection (ESD), as existing tools lack effective mechanisms for lifting and resecting tissues efficiently.
Innovation Solution
A medical system comprising a shaft with a working channel and two medical instruments: a tensioning tool with a hook or forceps and a cutting tool with pivotable blades, actuated by wires or cables, allowing for simultaneous traction and resection of target tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a lifting agent is injected under the lesion to facilitate access, then the lesion can be accessed by surgical instruments, but traction or tension cannot be effectively applied to the lesion
Solution Approach 1:
The system divides the traction application function into separate components: a first medical instrument (tensioning tool) dedicated to applying traction forces, and a second medical instrument (cutting tool) dedicated to resection. This segmentation allows each instrument to be optimized for its specific function, with the tensioning tool capable of applying effective traction forces through hooks or forceps while the cutting tool performs precise resection.
Solution Approach 2:
The system introduces an intermediary mechanism - the actuation cable or wire - that transmits forces from the proximal control mechanism to the distal end effectors. This intermediary allows the operator to apply traction forces through the working channel of the endoscope, enabling force application without requiring external traction devices.
2Productivity
If existing endoscopic tools are used for resection, then the procedure can be performed, but efficient lifting and resection of tissues cannot be achieved simultaneously
Solution Approach 1:
The system merges two previously separate functions - tissue lifting/traction and tissue resection - into a single integrated endoscopic system. The first medical instrument applies traction to lift the tissue, while the second medical instrument performs resection, and both can be operated simultaneously or sequentially through the same endoscope, improving overall procedural efficiency.
Solution Approach 2:
The endoscopic system is designed with multi-functionality, accommodating both a tensioning tool for traction and a cutting tool for resection within the same working channel architecture. This universal design allows a single endoscope to perform multiple functions that previously required separate devices, enhancing both lifting capability and resection efficiency.
3Illumination intensity
If traction is applied to facilitate resection, then visualization is enhanced, but tissue damage may occur
Solution Approach 1:
The system applies partial traction - sufficient to lift and visualize the target tissue adequately for precise resection, but not so excessive as to cause tissue damage or tearing. The tensioning tool can apply controlled forces through hooks or forceps that grasp the tissue edges, providing just enough traction to improve visualization and access without compromising tissue integrity.
Data Source
AI summary
Disclosed is a medical system that may comprise: a shaft having a working channel; a first medical instrument extending through the working channel; a second medical instrument disposed radially outside the shaft. The first medical instrument may be a tensioning tool and the second medical instrument may be a cutting tool comprising a first blade and a second blade. The first blade may be attached to a first actuation wire and the second blade may be attached to a second actuation wire.