3D Lesion Marking for Accurate Stapled Full-Thickness Resection
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Solution Overview
Problem
In existing gastrointestinal duct resection methods using medical staplers, it is difficult to accurately determine the position of the ligation relative to the marked region due to planar markings formed by high-frequency treatment, making it challenging to correctly resect the lesion site.
Innovation Solution
A method involving a three-dimensional marking step, retracting the marking to the hand side of the staple ejection position, followed by ligation and resection using a medical stapler with a grasping forceps and staple ejection mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If planar marking is formed by high-frequency treatment device, then marking can be made to determine guide of resection region, but it is difficult to recognize whether marking position is at hand side of stapler ejection position during ligation
Solution Approach 1:
The patent transforms the traditional planar (two-dimensional) marking into a three-dimensional marking structure. Specifically, it forms a raised marking by cauterizing peripheral tissues to create a protruding structure, or by placing a clip at the marking position. This dimensional change from flat to elevated/立体 allows the surgeon to visually and tactilely distinguish the marking position from the stapler ejection position, solving the recognition difficulty during ligation.
2Manufacturing precision
If ligation position is disposed outside of marking position, then correct resection of lesion site can be achieved, but it requires pulling marking to hand side of stapler ejection position which is difficult with planar marking
Solution Approach 1:
By creating a three-dimensional raised marking or clip-based marking, the patent makes the marking position visually distinct and easier to track during the retraction operation. The elevated structure or clip provides clear visual cues that help the surgeon accurately pull the marking to the hand side of the stapler ejection position, thereby facilitating precise ligation positioning outside the marking region.
Solution Approach 2:
The patent employs visual differentiation through color or appearance changes. The cauterized peripheral tissues exhibit color changes (charring or discoloration) that make the marking position easily distinguishable. Alternatively, a metal clip with distinct visual characteristics is placed at the marking position. These visual changes enable the surgeon to easily track and retract the marking to the correct position relative to the stapler ejection position.
3Measurement precision
If three-dimensional marking is formed, then marking position can be clearly recognized, but additional preprocessing step is required
Solution Approach 1:
The patent integrates the marking function with existing surgical instruments and procedures. The high-frequency treatment device used for cauterizing peripheral tissues also serves to create the three-dimensional raised marking, combining two functions into one tool. Similarly, a clip indwelling device that is commonly used for tissue clipping is utilized to create the marking, eliminating the need for specialized marking instruments and simplifying the overall procedure.
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
Enables precise and efficient resection of the lesion site by ensuring the ligation position is outside the marked region, facilitating accurate full thickness resection.
Implementation Method 1
cauterize the peripheral tissues of the lesion site and perform the marking by a high-frequency treatment device
Implementation Method 2
pulling the grasping forceps grasping the lesion site
Implementation Method 3
ejecting a staple from the stapler to ligate the peripheral tissues of the lesion site
Implementation Method 4
cut off tissues to resect the lesion site
Data Source
AI summary
In a full thickness resection using a medical stapler, when preprocessing of the resection, one may cauterize the peripheral tissues of the lesion site and perform the marking with a high-frequency treatment device to determine a guide of a region for the resection. However, when a planar marking is formed by cauterizing the peripheral tissues by a high-frequency treatment device, it may be difficult to visually recognize the marking in an endoscopic visual field.A lesion resection method can include forming a three-dimensional marking in peripheral tissues of a lesion; grasping the lesion by a grasping forceps; pulling the marking to a hand side of a staple ejection position of a stapler by pulling the grasping forceps grasping the lesion; ejecting a staple from the stapler to ligate the peripheral tissues of the lesion; and resecting the lesion.