Endoscopic Trisecting Cutting Snare for Large Polyp Removal
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Solution Overview
Problem
Current endoscopic techniques for polypectomy and tissue retrieval are inefficient and ineffective, particularly for large polyps in the proximal colon, due to the limitations of traditional snares and basket devices, which can prolong procedures and increase the risk of complications.
Innovation Solution
The endoscopic trisecting cutting snare system, which includes a primary snare loop and two cutting wires, allows for a trisecting cutting plane, enabling efficient cutting and removal of large polyps by cutting the polyp into three smaller fragments that can be easily suctioned and retrieved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional snare device is used for polypectomy, then the polyp can be removed, but the procedure is prolonged and tissue retrieval is ineffective for large polyps
Solution Approach 1:
The snare device is divided into multiple independent cutting loops (first cutting loop, second cutting loop, third cutting loop) that can simultaneously cut the polyp into multiple segments. This segmentation of the cutting function allows rapid fragmentation of large polyps into smaller pieces that can be suctioned through the collection channel, eliminating the need for time-consuming sequential cutting or basket device insertion.
2Reliability
If a basket device is used to collect large polyps, then the polyp can be collected, but the colonoscope must be removed and reinserted, adding significant time and complication risk
Solution Approach 1:
The device merges the polypectomy function (cutting loops) with the tissue retrieval function (collection channel) into a single integrated system. The cutting loops are positioned such that cut polyp segments fall directly into the collection channel, which remains in place throughout the procedure. This eliminates the need to remove and reinsert the colonoscope or switch between separate devices.
Solution Approach 2:
The snare device performs multiple functions simultaneously: it cuts the polyp into segments and collects the segments for retrieval through the same catheter assembly. The collection channel serves dual purposes as both a pathway for the cutting loops and a receptacle for the cut tissue segments.
3Quantity of substance
If a traditional snare is used to cut large polyps into small pieces, then tissue retrieval may be achieved, but the process is technically difficult and ineffective
Solution Approach 1:
The cutting function is segmented into multiple independent loops positioned at different locations and orientations. This allows the polyp to be cut into multiple segments simultaneously or in rapid succession, ensuring adequate fragmentation without requiring complex manual manipulation or precise timing by the operator.
Data Source
AI summary
An endoscopic trisecting cutting snare for use in colonoscopy or other endoscopic procedures, includes a primary snare loop, two trisecting cutting wires, a retracting wire, and a catheter for use in polypectomy or similar endoscopic procedures. The endoscopic trisecting cutting snare may be utilized in connection with an endoscopic device through a working channel for access to the operation site.